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Juniper Networks

jnpr · NASDAQ Technology
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Employees 5001-10,000
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FY2010 Annual Report · Juniper Networks
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JUNIPER NETWORKS INC (JNPR) 

   10-K 

Annual report pursuant to section 13 and 15(d) 
Filed on 02/25/2011 
Filed Period 12/31/2010 

 
 
  
 
  
  
  
 
 
 
  
  
 
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
 
 
                                    
Table of Contents 

(Mark One) 

UNITED STATES SECURITIES AND EXCHANGE COMMISSION 
Washington, D.C. 20549 
Form 10-K 

[X]  ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the fiscal year ended December 31, 2010 

OR 

[ ]  TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from to 

Commission file number 001-34501 
JUNIPER NETWORKS, INC. 
(Exact name of registrant as specified in its charter) 

Delaware 
(State or other jurisdiction of incorporation or organization)

77-0422528 
(IRS Employer Identification No.) 

1194 North Mathilda Avenue 
Sunnyvale, California 94089 
(Address of principal executive offices, incorporation or organization)

(408) 745-2000 
(Registrant's telephone number, including area code)

Securities registered pursuant to Section 12(b) of the Act: 

Title of Each Class 
Common Stock, par value $0.00001 per share 

Name of Each Exchange on Which Registered

New York Stock Exchange LLC

Securities registered pursuant to Section 12(g) of the Act: None 

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. Yes [X] No [ ] 
Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act. Yes [ ] No [X] 

Indicate by check mark whether the Registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the 
preceding  12 months  (or  for  such  shorter  period  that  the  registrant  was  required  to  file  such  reports),  and  (2) has  been  subject  to  such  filings  requirements  for  the  past 
90 days.  Yes [X] No [ ] 

Indicate  by  check  mark  whether  the  registrant  has  submitted  electronically  and  posted  on  its  corporate  Web  site,  if  any,  every  Interactive  Data  File  required  to  be 
submitted and posted pursuant to Rule 405 of Regulation S-T during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such 
files). Yes [X] No [ ] 

Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K is not contained herein, and will not be contained, to the best of the 

Registrant's knowledge, in definitive proxy or information statements incorporated by reference in Part III of the Form 10-K or any amendment to this Form 10-K. [ ]  

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See the definitions 

of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act. (Check one): 

Large Accelerated Filer [X] 

Accelerated Filer [ ] 

Non-Accelerated Filer [ ]

Smaller Reporting Company [ ]

Indicate by check mark whether the registrant is a shell company (as defined in Exchange Act Rule 12b-2 of the Exchange Act). Yes [ ] No [X] 

(Do not check if a smaller reporting company)

The aggregate market value of the common stock held by non-affiliates of the Registrant was approximately $8,678,000,000 as of the end of the Registrant's second 
fiscal quarter (based on the closing sale price for the common stock on the New York Stock Exchange on June 30, 2010). For purposes of this disclosure, shares of common 

 
 
 
 
  
  
  
 
 
  
 
 
  
     
 
 
 
 
 
  
 
 
 
 
 
 
  
 
 
 
 
 
  
  
  
  
  
  
 
 
 
 
  
  
  
  
stock held or controlled by executive officers and directors of the registrant and by persons who hold more than 5% of the outstanding shares of common stock have been treated 
as  shares  held  by  affiliates.  However,  such  treatment  should  not  be  construed  as  an  admission  that  any  such  person  is  an  “affiliate”  of  the  registrant.  The  registrant  has  no 
non-voting common equity. 

As of February 18, 2011, there were approximately 534,922,000 shares of the Registrant's common stock outstanding. 

DOCUMENTS INCORPORATED BY REFERENCE 

As  noted  herein,  the  information  called  for  by  Part III  is  incorporated  by  reference  to  specified  portions  of  the  Registrant's  definitive  proxy  statement  to  be  filed  in 
conjunction  with  the  Registrant's  2011  Annual  Meeting  of  Stockholders,  which  is  expected  to  be  filed  not  later  than  120 days  after  the  Registrant's  fiscal  year  ended 
December 31, 2010. 

 
 
  
 
  
  
ITEM 1. Business 
ITEM 1A. Risk Factors 
ITEM 1B. Unresolved Staff Comments 
ITEM 2. Properties 
ITEM 3. Legal Proceedings 
ITEM 4. Removed and Reserved 

Table of Contents 

PART I

PART II

ITEM 5. Market for Registrant's Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities
ITEM 6. Selected Consolidated Financial Data 
ITEM 7. Management's Discussion and Analysis of Financial Condition and Results of Operations
ITEM 7A. Quantitative and Qualitative Disclosure about Market Risk
ITEM 8. Financial Statements and Supplementary Data 
ITEM 9. Changes in and Disagreements with Accountants on Accounting and Financial Disclosures
ITEM 9A. Controls and Procedures 
ITEM 9B. Other Information 

PART III

ITEM 10. Directors and Executive Officers of the Registrant
ITEM 11. Executive Compensation 
ITEM 12. Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters 
ITEM 13. Certain Relationships and Related Transactions, and Director Independence
ITEM 14. Principal Accountant Fees and Services 

ITEM 15. Exhibits and Financial Statement Schedules 

PART IV

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ITEM 1.    Business 

Overview 

PART I 

We design, develop, and sell innovative products and services that together provide our customers with high-performance network 
infrastructure that creates responsive and trusted environments for accelerating the deployment of services and applications over a single 
network. We serve the high-performance networking requirements of global service providers, enterprises, and public sector organizations 
that view the network as critical to their success. We believe we are well positioned in the networking industry based on our core 
competencies in architecture, silicon design, and our open cross-network software platform that includes the Junos® operating system 
(“Junos OS”), Junos Space network application platform, and Junos Pulse integrated network client. We offer a broad product portfolio that 
spans routing, switching, security, application acceleration, and identity policy and control, which is designed by management to provide 
performance, choice, and flexibility while reducing overall total cost of ownership. In addition, through strong industry partnerships, we are 
fostering innovation across the network. 

Our operations are organized into two reportable segments: Infrastructure and Service Layer Technologies (“SLT”). Our Infrastructure 
segment primarily offers scalable routing and switching products that are used to control and direct network traffic from the core, through the 
edge, aggregation, and the customer premise equipment level. Additionally, the Infrastructure segment offers a complete wireless local area 
network ("WLAN") solution that provides high reliability, performance, security, and management for mobile applications. Infrastructure 
products include our Internet Protocol (“IP”) routing, carrier Ethernet routing portfolio, and Ethernet switching portfolio. Our SLT segment 
offers solutions that meet a broad array of our customers' priorities, from protecting the network itself and data on the network, to maximizing 
existing bandwidth and acceleration of applications across a distributed network. Both segments offer worldwide services, including technical 
support and professional services, as well as educational and training programs to our customers. Together, our high-performance product 
and service offerings help our customers to convert legacy networks that provide commoditized services into more valuable assets that 
provide differentiation, value, and increased performance, reliability, and security to end-users. See Note 13, Segment Information, in Notes 
to Consolidated Financial Statements in Item 8 of Part II of this Annual Report on Form 10-K, for financial information regarding each of our 
Infrastructure and SLT segments, which is incorporated herein by reference. 

During our fiscal year ended December 31, 2010, we generated net revenues of $4,093.3 million and net income attributable to Juniper 
Networks of $618.4 million, and conducted business in more than 100 countries around the world. Additionally, we completed the 
acquisitions of Ankeena Networks, Inc. ("Ankeena"), SMobile Systems, Inc. ("SMobile"), Altor Networks, Inc. ("Altor"), and Trapeze 
Networks ("Trapeze") during 2010. See Item 8 of Part II for more information on our consolidated balance sheets as of December 31, 2010, 
and 2009 and our consolidated statements of operations, consolidated statements of changes in equity, and consolidated statements of cash 
flows for each of the three years in the period ended December 31, 2010. 

We were incorporated in California in 1996 and reincorporated in Delaware in 1998. Our corporate headquarters are located in Sunnyvale, 
California. Our website address is www.juniper.net. 

Our Strategy 

Our objective and strategy is to be the leading provider of high-performance network infrastructure by transforming the experience and 
economics of networking. Key elements of our strategy are described below. 

Maintain and Extend Technology Leadership 

Our Junos OS, application-specific integrated circuit (“ASIC”) technology, and network-optimized product architecture have been key 
elements to establishing and maintaining our technology leadership. We believe that these elements can be leveraged for future products that 
we are currently developing. We intend to maintain and extend our technological leadership in the service provider and enterprise markets 
primarily through innovation and continued investment in research and development (“R&D”), supplemented by external partnerships, 
including strategic alliances and strategic acquisitions that would allow us to deliver a broad range of products and services to customers in 
target markets. 

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Leverage Position as Supplier of High-Performance Network Infrastructure 

From inception, we have focused on designing, developing, and building high-performance network infrastructure for demanding service 
provider and enterprise networking environments and have integrated purpose-built technology into a network-optimized architecture that 
specifically meets customer needs. We believe that many customers will deploy networking equipment from only a few vendors, and that the 
performance, reliability, and security of our products will provide us with a competitive advantage, which is critical to be selected as one of 
these vendors. 

Be Strategic to Our Customers 

In developing our Infrastructure and SLT solutions, we work very closely with customers to design and build best-in-class products and 
solutions specifically designed to meet their complex needs. Over time, we have expanded our understanding of the escalating demands and 
risks facing our customers, which has enabled us to design additional capabilities into our products. We believe our close relationships with, 
and constant feedback from, our customers have been key elements in our design wins and rapid deployments to date. We plan to continue to 
work hand-in-hand with our customers to implement product enhancements, as well as to design products that meet the evolving needs of the 
marketplace, while enabling customers to reduce costs. 

Enable New IP-Based Services 

Our platforms enable network operators to quickly build and secure networks cost-effectively and deploy new differentiated services to drive 
new sources of revenue more efficiently than legacy network products. We believe that the secure delivery of IP-based services and 
applications, including web hosting, outsourced Internet and intranet services, outsourced enterprise applications, and voice-over IP, will 
continue to grow and benefit from cost efficiencies enabled by our high-performance network infrastructure offerings. 

Establish and Develop Industry Partnerships 

Our customers have diverse requirements. While our products meet certain requirements of our customers, our products are not intended to 
satisfy all of their requirements. Therefore, we believe that it is important that we attract and build relationships with other industry leaders 
with diverse technologies and services that extend the value of the network to our customers. These partnerships ensure that our customers 
have access to those technologies and services, whether through technology integration, joint development, resale, or other collaboration, in 
order to better support a broader set of our customers' requirements. In addition, we believe an open network infrastructure that invites partner 
innovation provides customers with greater choice and control in meeting their evolving business requirements, while enabling them to 
reduce costs. 

Markets and Customers 

We sell our high-performance network products and service offerings through direct sales and through distributors, value-added resellers, and 
original equipment manufacturer (“OEM”) partners to end-users in the following markets: 

Service Providers 

Service providers include wireline, wireless, and cable operators, as well as major Internet content and application providers. We support 
most major service provider networks in the world and our high-performance network infrastructure offerings are designed and built for the 
performance, reliability, and security that service providers demand. We believe our networking infrastructure offerings benefit our service 
provider customers by: 

•     

Reducing capital and operational costs by running multiple services over the same network using our high density and highly 
reliable platforms; 

•     

Promoting generation of additional revenues by enabling new services to be offered to new market segments based on our 

 
 
  
  
  
  
  
  
  
  
  
  
  
  
 
 
  
 
 
product capabilities; 

•     

Increasing customer satisfaction, while lowering costs, by enabling consumers to self-select automatically provisioned service 
packages that provide the quality, speed, and pricing they desire; and

•     

Providing increased asset longevity and higher return on investment as their networks can scale to multi-terabit

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rates based on the capabilities of our platforms. 

While many of these service providers have historically been categorized separately as wireline, wireless, or cable operators, in recent years, 
we have seen a move towards convergence of these different types of service providers through acquisitions, mergers, and partnerships. We 
believe these strategic developments are made technically possible as operators invest in the build out of next generation networks capable of 
supporting voice, video, and data traffic on to the same IP-based network. This convergence relies on IP-based traffic processing and creates 
the opportunity for multi-service networks and offer service providers significant new revenue opportunities. 

We believe that there are several other trends affecting service providers for which we are well positioned to deliver products and solutions. 
These trends include significant growth in IP traffic on service provider networks because of peer-to-peer interaction, broadband usage, 
video, an increasing reliance on the network as a mission critical business tool in the strategies of our IP customers and of their enterprise 
customers, and growth in mobile traffic as a result of the increase mobile device usage including notebooks, netbooks, smartphones, and 
tablets. 

The IP infrastructure market for service providers includes: products and technology at the network core; the network edge to enable access; 
the aggregation layer; security to protect from the inside out and the outside in; the application awareness and intelligence to optimize the 
network to meet business and user needs; and the management, service awareness, and control of the entire infrastructure. 

Enterprise 

Our high-performance network infrastructure offerings are designed to meet the performance, reliability, and security requirements of the 
world's most demanding businesses. Enterprises and public sector organizations, such as governments and research and education institutions, 
that view their networks as critical to their success are able to deploy our solutions as a powerful component in delivering the advanced 
network capabilities needed for their leading-edge applications. In addition, our solutions: 

•     

Assist in the consolidation and delivery of existing services and applications;

•     

Accelerate the deployment of new services and applications;

•     

Offer integrated security to assist in the protection and recovery of services and applications; and 

•     

Offer operational improvements that enable cost reductions, including lower administrative, training, customer care, and labor 
costs. 

As with the service provider market, innovation continues to be a critical component in our strategy for the enterprise market. 
High-performance enterprises require networks that are global, distributed, and always available. Network equipment vendors serving these 
enterprises need to demonstrate performance, reliability, and security with best-in-class open solutions for maximum flexibility. We offer 
enterprise solutions and services for data centers, branch and campus applications, distributed and extended enterprises, and Wide Area 
Network (“WAN”) gateways. 

As customers increasingly view the network as critical to their success, we believe that customers will increasingly demand fast, reliable, and 
secure access to services and applications over a single IP-based network. This is partly illustrated by the success of our SRX Services 
Gateways that consolidate switching, routing, and security services in a single device, Integrated Security Gateway (“ISG”) products that 

 
 
  
  
  
  
  
  
 
 
  
 
 
  
 
 
  
 
 
  
  
combine firewall/virtual private network (“VPN”) and intrusion detection and prevention (“IDP”) solutions in a single platform, and Secure 
Services Gateway (“SSG”) platforms that provide a mix of high-performance security with Local Area Network (“LAN”)/WAN connectivity 
for regional and branch office deployments. We will continue to invest to develop these and other converged technologies and solutions. 

Customers with Ten Percent of Net Revenues or Greater 

Verizon Communications, Inc. accounted for greater than 10% of our total net revenues in 2010. AT&T, Inc., accounted for greater than 10% 
of our total net revenues in 2009. No single customer accounted for more than 10% of our total net revenues in 2008. 

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Our Products and Technology 

Early in our history, we developed, marketed, and sold the first commercially available purpose-built IP backbone router optimized for the 
specific high-performance requirements of service providers. As the need for core bandwidth continued to increase, the need for service rich 
platforms at the edge of the network was created. 

Our Infrastructure products are designed to address the needs at the core and the edge of the network, as well as for wireless access, by 
combining high-performance packet forwarding technology and robust operating systems into a network-optimized solution. In addition, as 
enterprises continue to develop and rely upon more sophisticated and pervasive internal networks, we believe the need for products with 
high-performance routing and switching technology is expanding to a broader set of customers, and we believe our expertise in this 
technology well positions us to address this growing market opportunity. 

Additionally, our SLT segment offers a broad family of network security solutions that deliver high-performance, cost-effective security for 
enterprises, service providers, and government entities, including integrated firewall and VPN solutions, secure sockets layer (“SSL”) VPN 
appliances, and IDP appliances. We also offer complementary products and technologies to enable our customers to provide additional 
IP-based services and enhance the performance and security of their existing networks and applications. 

The following is an overview of our major Infrastructure and SLT product families: 

Infrastructure Products 

•     

•     

•     

T Series, TX, JCS, and M Series:  Our T Series core routers are primarily designed for core IP infrastructures and are also being 
sold into the multi-service environment. Our M Series routers are extremely versatile as they can be deployed at the edge of 
operator networks, in small and medium core networks, enterprise networks, and in other applications. The T Series and M Series 
products leverage our ASIC technology and Junos OS to enable consistent, continuous, reliable, and predictable service delivery. 
The TX and TX Plus products connect multiple T Series chassis to deliver multi-chassis scale in a single network node for the 
world's largest core routing applications. The JCS product reduces complexity and operating cost for our customers by 
virtualizing the network infrastructure to allow multiple independent network services to run on top of the same physical network 
infrastructure. 

E Series:  Our E Series products are a full featured platform designed for the network edge with support for carrier-class routing, 
broadband subscriber management services, and a comprehensive set of IP services. Leveraging our JunosETM software, the E 
Series service delivery architecture enables service providers to easily deploy innovative revenue-generating services to their 
customers. All E Series platforms offer a full suite of routing protocols and provide scalable capacity for tens of thousands of users.

MX Series:  The MX Series is a product family developed to address emerging Ethernet network architectures and services in 
service provider and enterprise networks. Using our Junos OS, the MX platforms provide the carrier-class performance, scale, and 
reliability to enable service providers and enterprises to support large-scale Ethernet deployments. The MX Series also leverages 
our Junos Trio chipset with “3D Scaling” technology, which functions as an Universal Edge platform capable of supporting all 
types of business, mobile, and residential services optimized for Ethernet and addresses a wide range of deployments architectures, 
port densities, and interfaces for both service provider and enterprise environments.

•     

EX Series:  Our EX Series family extends our product portfolio running our Junos OS to address the Ethernet switch market. 
Ethernet is a widely used technology used to transport information in enterprise networks. Our EX Series switches are designed to 

 
 
  
  
  
  
  
  
 
 
  
 
 
  
 
 
  
 
 
enable customers to cost effectively accelerate and simplify the installation and management of business applications across their 
networks and enhance network operations without compromising performance.

Trapeze Products: The Trapeze product family adds a complete WLAN solution to the Juniper campus portfolio, accelerating our 
growth in the enterprise market and advancing our vision for the new network. The Trapeze product family provides the highest 
levels of WLAN reliability, performance, security, and management for today's most demanding mobile applications.

VXA Series: Our VXA Series Media Flow Engines are a line of high-performance content delivery appliances

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designed to maximize the scale and reliability of our Media Flow Solution. Our Media Flow Solution is a converged content delivery and 
caching solution that enables service providers, content publishers, and content delivery networks to deliver rich media content more 
efficiently, cost effectively and profitably. 

SLT Products 

•     

Services Gateway, Integrated Firewall, and VPN Solutions:  Our SRX Series of dynamic services gateways, running our Junos 
software, provides unrivaled firewall/VPN performance and scalability and combines routing, switching, and security 
functionality. The series is designed to meet network and security requirements for data center consolidation, rapid managed 
services deployments, and aggregation of security services. Our firewall and VPN systems and appliances are designed to provide 
integrated firewall, VPN, and denial of service protection capabilities for both enterprise environments and service provider 
network infrastructures. These products range from our SSG product series, which combines LAN/WAN routing capabilities with 
unified threat management features such as antivirus, anti-spam, and web filtering technologies, to our ISG and NetScreen Series 
firewall and VPN systems, which are designed to deliver high-performance security in medium/large enterprises, carrier networks, 
and data centers. 

•     

Secure Access Appliances:  Our Junos Pulse, Junos Pulse Mobile Security Suite, and SA Series SSL VPN appliances, designed for 
use in companies of all sizes, are used to provide secure access to corporate resources for remote and mobile users from any 
web-enabled device, regardless of location. 

•     

IDP Series Appliances:  Our IDP Series appliances utilize advanced intrusion detection methods to increase the detection rate of 
and prevent network attacks, as well as provide fast and efficient traffic processing and alarm collection, presentation, and 
forwarding. Once an attack is detected, our IDP appliances prevent the intrusion by dropping the packets or connection associated 
with the attack, reducing or eliminating the effects of the attack.

•     

Application Acceleration Platforms:  Our WXC Series platforms improve the performance of client-server and web-enabled 
business applications for branch-office, remote, and mobile users. These application acceleration platforms enable our customers 
to deliver LAN-like performance to users around the globe who access centralized applications. 

•     

Identity and Policy Control Solutions:  Our portfolio of identity and policy control solutions integrate subscriber privileges, 
application requirements, and business policies with the IP network infrastructure in order to improve the end-user experience, 
enhance security, and help reduce operational costs.

See Item 7, "Management's Discussion and Analysis of Financial Condition and Results of Operations," in Part II of this Annual Report on 
Form 10-K, for an analysis of net product revenues by segment. 

Junos Platform 

In addition to our major product families, our extended software portfolio, known as Junos Platform, is a key technology element in our 
strategy to be the leader in high-performance networking. In February 2010, we announced a new business group called Junos Ready 
Software dedicated to creating and delivering an ecosystem of software and applications built on the Junos Platform to solve the most 

 
 
  
  
 
 
  
 
 
  
 
 
  
 
 
  
 
 
  
  
  
pressing challenges facing customers today. The Junos Platform includes: 

•     

Junos Space - Our Junos Space network application platform offers an open, Service-Oriented Architecture-based ("SOA") 
platform for creating organic and third party software applications to drive network innovation.   Junos Space includes 
applications for network infrastructure automation that help customers reduce operational cost and complexity and scale services. 
These include Network Activate, Ethernet Design, Route Insight, Security Design, Virtual Control, Service Now and Service 
Insight. 

•     

Junos Pulse - Junos Pulse is a dynamic, integrated network client that delivers unified location-aware, identity-enabled network 
security, connectivity, access, and acceleration. It simplifies mobility and streamlines fast network and application access 
regardless of location, while supporting select third-party application development and integration. 

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The Junos Platform enables our customers to expand network software into the application space, deploy software clients to control delivery, 
and accelerate the pace of innovation with an ecosystem of developers. At the heart of the Junos Platform is Junos OS. We believe Junos OS 
is fundamentally superior to other network operating systems in not only its design, but also in its development capabilities. The advantages 
of Junos OS include: 

•     

One modular operating system with single source base of code and a single, consistent implementation for each control plane 
feature; 

•     

•     

One software release train extended through a highly disciplined and firmly scheduled development process; and

One common modular software architecture that scales across all Junos-based platforms.

Junos OS is designed to maintain continuous systems and improve the availability, performance, and security of business applications 
running across the network. Junos OS helps to automate network operations by providing a single consistent implementation of features 
across the network in a single release train that seeks to minimize the complexity, cost, and risk associated with implementing network 
features and upgrades. This operational efficiency allows network administrators more time to innovate and deliver new revenue-generating 
applications, helping to advance the economics of high-performance networking. 

The security and stability of Junos OS, combined with its modular architecture and single source code base, provides a foundation for 
delivering performance, reliability, security, and scale at a lower total cost of ownership than multiple operating code base environments. 
With an increasing number of our platforms able to leverage Junos OS, including routing, switching, and security products, we believe Junos 
OS provides us a competitive advantage over other major network equipment vendors. 

Major Product Development Projects 

In 2010, we announced the first solutions from Project Falcon, Juniper's initiative for providing flexible mobility solutions to service 
providers that enables them to take advantage of the rapid rise in mobility and mobile applications, including video. The new solutions, 
including - Juniper Traffic Direct, Juniper Media Flow, and Juniper Mobile Core Evolution - are based on the Junos software platform and 
Juniper's MX 3D Series Universal Edge Routers, which deliver what we believe is revolutionary 3D Scaling to help networks scale 
dynamically to support more bandwidth, subscribers, and services. Further, we expect to extend our leadership in universal edge with the 
introduction of non-Ethernet interfaces in our MX Series routers. Additionally, we announced a new data center network architecture called 
the 3-2-1, which allows customers to begin the process of simplifying and “flattening” their data centers with an ultimate vision of a single 
tier data center fabric promised by Project Stratus, which was our initiative to deliver the next-generation data center fabric. We also 
announced the Junos Pulse Mobile Security Suite, the industry's most comprehensive solution for securing mobile devices in today's highly 
connected personal and work environments. 

Customer Service 

In addition to our Infrastructure and SLT products, we offer support, professional, and educational services. We deliver these services directly 
to end-users and utilize a multi-tiered support model, leveraging the capabilities of our partners and third-party organizations, as appropriate. 

We also train our channel partners in the delivery of support, professional, and educational services to ensure these services are locally 
delivered. 

As of December 31, 2010, we employed 1,064 people in our worldwide customer service and support organization. We believe that a broad 
range of support services is essential to the successful customer deployment and ongoing support of our products, and we have hired support 
engineers with proven network experience to provide those services. 

Manufacturing and Operations 

 
 
  
 
 
  
 
 
  
 
 
  
  
  
  
  
  
  
  
  
As of December 31, 2010, we employed 273 people in manufacturing and operations who primarily manage relationships with our contract 
manufacturers, manage our supply chain, and monitor and manage product testing and quality. 

We have subcontracted the majority of our manufacturing activity with Celestica, Flextronics, Plexus, and Accton Technology. Our 
manufacturing is primarily conducted through contract manufacturers in China, Malaysia, Mexico, the United States, and 

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Taiwan. 

 Our contract manufacturers in all locations are responsible for all phases of manufacturing from prototypes to full production and assist with 
activities such as material procurement, final assembly, test, control, shipment to our customers, and repairs. Together with our contract 
manufacturers, we design, specify, and monitor the tests that are required to meet internal and external quality standards. These arrangements 
provide us with the following benefits: 

•     

We can quickly deliver products to customers with turnkey manufacturing and drop-shipment capabilities; 

•     

We gain economies of scale because, by purchasing large quantities of common components, our contract manufacturers obtain 
more favorable pricing than if we were buying components alone;

•     

We operate without dedicating significant space to manufacturing operations; and

•     

We can reduce our costs by reducing fixed overhead expenses.

Our contract manufacturers manufacture our products based on our rolling product demand forecasts. Each contract manufacturer procures 
components necessary to assemble the products in our forecast and tests the products according to our specifications. Products are then 
shipped to our distributors, value-added resellers, or end-users. Generally, we do not own the components, and title to the products transfers 
from the contract manufacturers to us and immediately to our customers upon delivery at a designated shipment location. If the components 
remain unused or the products remain unsold for specified period, we may incur carrying charges or obsolete material charges for 
components that our contract manufacturers purchased to build products to meet our forecast or customer orders. 

Although we have contracts with our contract manufacturers, those contracts merely set forth a framework within which the contract 
manufacturer may accept purchase orders from us. The contracts do not require them to manufacture our products on a long-term basis. 

Our ASICs are manufactured primarily by sole or limited sources, such as International Business Machines Corporation (“IBM”), each of 
which is responsible for all aspects of ASICs production using our proprietary designs. 

By working collaboratively with our suppliers, we have the opportunity to promote socially responsible business practices beyond our 
company and into our worldwide supply chain. To this end, we have adopted, and promote the adoption by others, of the Electronic Industry 
Code of Conduct (“EICC”). The EICC outlines standards to ensure that working conditions in the electronics industry supply chain are safe, 
workers are treated with respect and dignity, and manufacturing processes are environmentally responsible. 

Research and Development 

We have assembled a team of skilled engineers with extensive experience in the fields of high-end computing, network system design, ASIC 
design, security, routing protocols, software applications and platforms, and embedded operating systems. As of December 31, 2010, we 
employed 4,132 people in our worldwide R&D organization. 

We believe that strong product development capabilities are essential to our strategy of enhancing our core technology, developing additional 
applications, integrating that technology, and maintaining the competitiveness and innovation of our product and service offerings. In our 
Infrastructure and SLT products, we are leveraging our software ASIC and systems technology, developing additional network interfaces 
targeted to our customers' applications, and continuing to develop technology to support the anticipated growth in IP network requirements. 

 
 
  
  
 
 
  
 
 
  
 
 
  
 
 
  
  
  
  
  
  
  
We continue to expand the functionality of our products to improve performance reliability and scalability, and to provide an enhanced user 
interface. 

Our R&D process is driven by the availability of new technology, market demand, and customer feedback. We have invested significant time 
and resources in creating a structured process for all product development projects. Following an assessment of market demand, our R&D 
team develops a full set of comprehensive functional product specifications based on inputs from the product management and sales 
organizations. This process is designed to provide a framework for defining and addressing the steps, tasks, and activities required to bring 
product concepts and development projects to market. Expenditures for R&D were $917.9 million, $741.7 million, and $731.2 million in 
2010, 2009, and 2008, respectively. 

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Sales and Marketing 

As of December 31, 2010, we employed 2,466 people in our worldwide sales and marketing organization. These sales and marketing 
employees operate in different locations around the world in support of our customers. 

Our sales organization, with its structure of sales professionals, system engineers, and marketing and channel teams, is generally split 
between service provider and enterprise customers. Within each team, sales team members serve the following three geographic regions: 
(i) Americas (including United States, Canada, Mexico, and Central and South America), (ii) Europe, Middle East, and Africa (“EMEA”), 
and (iii) Asia Pacific (“APAC”). Within each region, there are regional and country teams, as well as major account teams, to ensure we 
operate close to our customers. 
See Note 13, Segment Information, in Notes to Consolidated Financial Statements in Item 8 of Part II of this Annual Report on Form 10-K, 
for information concerning our revenues by geographic regions and by significant customers, which is incorporated herein by reference. Our 
operations subject us to certain risks and uncertainties associated with international operations. See Item 1A of Part I, “Risk Factors,” for 
more information. 

Our sales teams operate in their respective regions and generally either engage customers directly or manage customer opportunities through 
our distribution and reseller relationships or channels as described below. 

In the United States and Canada, we sell to several service providers directly and sell to other service providers and enterprise customers 
primarily through distributors and resellers. Almost all of our sales outside the United States and Canada are made through our channel 
partners. 

Direct Sales Structure 

Our sales team engages with customers with which we have direct relationships. The terms and conditions of these arrangements are 
governed either by customer purchase orders and our acknowledgment of those orders or by purchase contracts. The direct contracts with 
these customers set forth only general terms of sale and do not require customers to purchase specified quantities of our products. We directly 
receive and process customer purchase orders.  

Channel Sales Structure 

A critical part of our sales and marketing efforts are our channel partners through which we do the majority of our sales. We employ various 
channel partners, including but not limited to: 

•     

•     

A global network of strategic distribution relationships, as well as region- or country-specific distributors who in turn sell to local 
value-added resellers who sell to end-user customers. Our distribution channel partners mainly sell our SLT products plus certain 
Infrastructure products that are often purchased by our enterprise customers. These distributors tend to be focused on particular 
regions or countries within regions. For example, we have substantial distribution relationships with Ingram Micro in the Americas 
and with NEC in Japan. Our agreements with these distributors are generally non-exclusive, limited by region, and provide product 
discounts and other ordinary terms of sale. These agreements do not require our distributors to purchase specified quantities of our 
products. 

Direct value-added resellers, including our strategic worldwide resellers referenced below, resell our products to end-users around 
the world. These direct value-added resellers buy the products and services directly from us and have expertise in deploying 
complex networking solutions in their respective markets. Our agreements with these direct value-added resellers are generally 
non-exclusive, limited by region, and provide product discounts and other ordinary terms of sale. These agreements do not require 
our direct value-added resellers to purchase specified quantities of our products. Increasingly, our service provider customers also 
resell our products to their customers or purchase our products for the purpose of providing managed services to their customers.

 
 
  
  
  
  
  
  
  
  
  
 
 
  
 
 
  
 
 
•     

Strategic worldwide reseller relationships with Nokia Siemens Networks B.V. ("NSN"), Ericsson Telecom A.B. (“Ericsson”), and 
IBM. These companies each offer services and products that complement, but in some cases compete with, our own product 
offerings and act as a fulfillment partner for our products. Our arrangements with these partners allow them to resell our products 
on a worldwide, non-exclusive basis, provide for product discounts, and specify other general terms of sale. These agreements do 
not require these partners to purchase specified quantities of our products.

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•     

OEM relationships with Dell Corporation and IBM. Our OEM arrangements with these partners allow them to rebrand and resell 
certain of our product lines on a worldwide, non-exclusive basis, provide for product discounts, and specify other general terms of 
sale. These agreements do not require these partners to purchase specified quantities of our products. 

In addition to our sales that are direct to customers or that are made entirely through channel partners, we have a “direct touch” sales team 
that works directly with channel partners on key accounts in order to maintain a direct relationship with our more strategic end-user 
customers while at the same time supporting the ultimate fulfillment of product through our channel partners. 

Backlog 

Our sales are made primarily pursuant to purchase orders under framework agreements with our customers. At any given time, we have 
backlog orders for products that have not shipped. Because customers may cancel purchase orders or change delivery schedules without 
significant penalty, we believe that our backlog at any given date may not be a reliable indicator of future operating results. As of 
December 31, 2010, and 2009, our total backlog was approximately $330 million and $270 million, respectively. Our backlog consists of 
confirmed orders for products scheduled to be shipped to customers, generally within the next six months. Our backlog excludes orders from 
distributors as we recognize product revenue on sales made through distributors upon sell-through to end-users. 

Seasonality 

Many companies in our industry experience adverse seasonal fluctuations in customer spending patterns, particularly in the first and third 
quarters. In addition, our SLT segment has generally experienced seasonally strong customer demand in the fourth quarter. This historical 
pattern should not be considered a reliable indicator of our future net revenues or financial performance. 

Competition 

Infrastructure Business 

In the network infrastructure business, Cisco Systems, Inc. ("Cisco") has historically been the dominant player in the market. However, other 
companies such as Alcatel-Lucent, Brocade Communications Systems, Inc. ("Brocade"), Extreme Networks, Inc., Hewlett Packard Company 
("HP"), and Huawei Technologies Co., Ltd. ("Huawei") are also our principal competitors. 

Many of our current and potential competitors, such as Cisco, Alcatel-Lucent, HP, and Huawei bundle their products with other networking 
products in a manner that may discourage customers from purchasing our products. In addition, consolidation among competitors, or the 
acquisition of our partners and resellers by competitors, can increase the competitive pressure faced by us due to their increased size and 
breadth of their product portfolios. For example, in 2009, Brocade acquired Foundry Networks, Inc. ("Foundry Networks"). In addition, many 
of our current and potential competitors have greater name recognition and more extensive customer bases that they may leverage to compete 
more effectively could be leveraged. Increased competition could result in price reductions, fewer customer orders, reduced gross margins, 
and loss of market share, negatively affecting our operating results. 

SLT Business 

In the market for SLT products, Cisco generally is our primary competitor with its broad range of products. In addition, there are a number of 
other competitors for each of the product lines within SLT, including Checkpoint Software Technologies, F5 Networks, Inc., and Riverbed 
Technology, Inc. These additional competitors tend to be focused on single product line solutions and, therefore, may be considered 
specialized compared to our broader product line. In addition, a number of public and private companies have announced plans for new 
products to address the same needs that our products address. We believe that our ability to compete with Cisco and others depends upon our 
ability to demonstrate that our products are superior in meeting the needs of our current and potential customers. 

For both product groups, we expect that over time, large companies with significant resources, technical expertise, market experience, 
customer relationships, and broad product lines, such as Cisco, Alcatel-Lucent, and Huawei, will introduce new products designed to compete 
more effectively in the market. There are also several other companies that claim to have products with greater capabilities than our products. 
There continues to be consolidation in this industry, with smaller companies being acquired by larger, established suppliers of network 
infrastructure products. We believe this trend is likely to continue. 

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As a result, we expect to face increased competition in the future from larger companies with significantly more resources than we have. 
Although we believe that our technology and the purpose-built features of our products make them unique and will enable us to compete 
effectively with these companies, we cannot guarantee that we will be successful. 

Environment 

We are subject to regulations that have been adopted with respect to environmental matters, such as the Waste Electrical and Electronic 
Equipment (“WEEE”), Restriction of the Use of Certain Hazardous Substances in Electrical and Electronic Equipment (“RoHS”), and 
Registration, Evaluation, Authorization, and Restriction of Chemicals (“REACH”) regulations adopted by the European Union. In addition, 
we participate in the Carbon Disclosure Project (“CDP”). CDP is a global standardized mechanism by which companies report their 
greenhouse gas emissions to institutional investors. It hosts one of the largest registries of corporate greenhouse gas data in the world at 
www.cdproject.net. We continue to invest in the infrastructure and systems required to be able to inventory and measure our carbon footprint 
on a global basis. We believe we have made significant strides in improving our energy efficiency around the world. 

To date, compliance with federal, state, local, and foreign laws enacted for the protection of the environment has had no material effect on 
our capital expenditures, earnings, or competitive position. 

In addition, we are committed to the environment by our effort in improving the energy efficiency of key elements in our high-performance 
network product offerings. For example, our T1600 router consumes substantially less energy than competitive products. The environment 
will remain a focus area across multiple aspects of our business. 

Intellectual Property 

Our success and ability to compete are substantially dependent upon our internally developed technology and expertise. 

While we rely on patent, copyright, trade secret, and trademark law to protect our technology, we also believe that factors such as the 
technological and creative skills of our personnel, new product developments, frequent product enhancements, and reliable product 
maintenance are essential to establishing and maintaining a technology leadership position. There can be no assurance that others will not 
develop technologies that are similar or superior to our technology. 

In addition, we integrate licensed third-party technology into certain of our products. From time to time, we license additional technology 
from third parties to develop new products or product enhancements. There can be no assurance that third-party licenses will be available or 
continue to be available to us on commercially reasonable terms. Our inability to maintain or re-license any third-party licenses required in 
our products or our inability to obtain third-party licenses necessary to develop new products and product enhancements could require us to 
obtain substitute technology of lower quality or performance standards or at a greater cost, any of which could harm our business, financial 
condition, and results of operations. 

Our success will depend in part upon our ability to obtain necessary intellectual property rights and protect our intellectual property rights. 
We cannot be certain that patents will be issued on the patent applications that we have filed, that we will be able to obtain the necessary 
intellectual property rights, or that other parties will not contest our intellectual property rights. 

Employees 

As of December 31, 2010, we had 8,772 full-time employees. We have not experienced any work stoppages, and we consider our relations 
with our employees to be good. Competition for qualified personnel in our industry is intense. We believe that our future success depends in 
part on our continued ability to hire, motivate, and retain qualified personnel. We believe that we have been successful in recruiting qualified 
employees, but there is no assurance that we will continue to be successful in the future. 

Our future performance depends significantly upon the continued service of our key technical, sales, and senior management personnel, none 
of whom are bound by an employment agreement requiring service for any defined period of time. The loss of one or more of our key 
employees could have a material adverse effect on our business, financial condition, and results of operations. Our future success also 
depends on our continuing ability to attract, train, and retain highly qualified technical, sales, and managerial personnel. Competition for such 
personnel is intense, and there can be no assurance that we can retain our key personnel in the future. 

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Executive Officers of the Registrant 

The following sets forth certain information regarding our executive officers as of the filing of this Annual Report on Form  
10-K. 

Name  
Kevin R. Johnson 
Pradeep Sindhu 

Mark Bauhaus 

Robyn M. Denholm 

Stefan Dyckerhoff 

Mitchell Gaynor 
John Morris 
Michael J. Rose 
Gene Zamiska 

Age

50
58

49 

47

38 

51
50
58
49

Position  

  Chief Executive Officer 
  Chief Technical Officer and Vice Chairman of the Board
   Executive Vice President and General Manager, Service 

Layer Technology Business Group 

  Executive Vice President and Chief Financial Officer
   Executive Vice President and General Manager, 

Infrastructure Products Group 

  Senior Vice President, General Counsel and Secretary
  Executive Vice President, Worldwide Sales and Services
  Executive Vice President of Service, Support and Operations
  Vice President, Finance and Corporate Controller

KEVIN R. JOHNSON joined Juniper Networks as Chief Executive Officer and a member of the board of directors in September 2008. Mr. 
Johnson joined Juniper Networks from Microsoft Corporation where he served in a range of executive assignments since September 1992. 
Most recently he was president of the Platforms and Services Division, the company's largest division responsible for the Windows and 
online services businesses. Prior to that, he was group vice president of Microsoft's worldwide sales, marketing and services. He began his 
career at IBM, working in the company's systems integration and consulting business. Mr. Johnson holds a Bachelor's degree in business 
administration from New Mexico State University and has served on the board of non-profits focusing on technology and women's career 
advancement. He was appointed by President George W. Bush to serve on the National Security Telecommunications Advisory Committee. 
He is also a board member of Starbucks Coffee Company. 

PRADEEP SINDHU founded Juniper Networks in February 1996 and served as Chief Executive Officer and Chairman of the Board of 
Directors until September 1996. Dr. Sindhu currently serves as Vice Chairman of the Board of Directors and Chief Technical Officer. Before 
founding Juniper Networks, Dr. Sindhu was a Principal Scientist and Distinguished Engineer at the Computer Science Lab at Xerox 
Corporation's Palo Alto Research Center. Dr. Sindhu holds a bachelor's degree in electrical engineering from the Indian Institute of 
Technology in Kanpur, a master's degree in the same discipline from the University of Hawaii, and a master's and a doctorate degree in 
Computer Science from Carnegie-Mellon University. 

MARK BAUHAUS joined Juniper Networks in September 2007 as Executive Vice President and General Manager of the SLT Business 
Group. Before joining Juniper Networks, Mr. Bauhaus established Bauhaus Productions Consulting, where he served as founder and 
principal until September 2007, after serving over 20 years at Sun Microsystems ("Sun") in a range of executive level assignments from 
December 1986 through December 2006, most recently in the position of Senior Vice President of Service-Oriented Architecture Software. 
Prior to that, he was Senior Vice President, Java Web Services at Sun and Vice President and Founder of Global Dot.Com Consulting. Mr. 
Bauhaus began his career as an environmental engineer for HP. Mr. Bauhaus holds a bachelor's degree in business management and 
environmental systems analysis from the University of California at Davis. 

ROBYN M. DENHOLM joined Juniper Networks in August 2007 as Executive Vice President and Chief Financial Officer. Prior to joining 
Juniper Networks, Ms. Denholm was at Sun from January 1996 to August 2007, where she served in executive assignments that included 
Senior Vice President of Corporate Strategic Planning, Senior Vice President of Finance, Vice President and Corporate Controller (Chief 
Accounting Officer), Vice President of Finance, Director of Service Division, and Shared Financial Services APAC and Controller, 
Australia/New Zealand. Prior to joining Sun, Ms. Denholm served at Toyota Motor Corporation Australia for seven years and at Arthur 
Andersen & Company for five years in various finance assignments. Ms. Denholm is a Fellow of the Institute of Chartered Accountants of 
Australia and holds a bachelor's degree in economics from the University of Sydney and a master's degree in commerce from the University 
of New South Wales. 

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STEFAN DYCKERHOFF joined Juniper Networks in October 2009 and serves as our Executive Vice President and General Manager of the 
Infrastructure Products Group. Prior to re-joining Juniper, Mr. Dyckerhoff was at Cisco, from May 2004 to September 2009, serving as Vice 
President and General Manager of the Edge Routing Business Unit. From January 1997 to May 2004, Mr. Dyckerhoff was at Juniper 
Networks serving in various engineering leadership roles. Mr. Dyckerhoff holds a bachelor's degree in electrical engineering and computer 
science from Duke University and a master's degree in Electrical Engineering from Stanford University. 

MITCHELL GAYNOR joined Juniper Networks in February 2004 as Vice President, General Counsel, and Secretary and served as Senior 
Vice President, General Counsel and Secretary from February 2008 to February 2011 and is currently our Executive Vice President, 
General Counsel and Secretary. Prior to joining Juniper Networks, Mr. Gaynor was Vice President, General Counsel, and Secretary of 
Portal Software, Inc. and Sybase, Inc. In private practice, he was an associate with the law firm of Brobeck, Phleger & Harrison. 
Mr. Gaynor holds a law degree from University of California's Hastings College of the Law and a bachelor's degree in History from the 
University of California, Berkeley. 

JOHN MORRIS joined Juniper Networks in July 2008 as Executive Vice President of Worldwide Field Operations. Prior to joining Juniper 
Networks, Mr. Morris was President and Chief Operating Officer of Pay By Touch, from May 2005 to October 2007, after serving 23 years 
at IBM, where he served in a range of executive assignments, most recently as Vice President and General Manager of the Distribution 
Sector in the Americas region. Mr. Morris also served on IBM's Global Marketing Council and has extensive experience in Asia, including 
serving as Vice President and General Manager of the distribution sector for Asia Pacific, based in Tokyo, Japan. 

MICHAEL J. ROSE joined Juniper Networks in November 2008 as Executive Vice President of Service, Support. and Operations. He also 
served on Juniper Network's Board of Directors from July 2007 through November 2008. Before joining Juniper Networks, Mr. Rose was an 
independent business consultant after serving as Executive Vice President and Chief Information Officer of Royal Dutch Shell plc from 
September 2001 through December 2005. Prior to Royal Dutch Shell, Mr. Rose worked for 23 years in a wide range of positions at HP 
across finance, IT, and field operations, including Chief Information Officer and Corporate Controller. Mr. Rose holds a bachelor's degree 
in economics from the State University of New York at Geneseo, N.Y. 

GENE ZAMISKA joined Juniper Networks in December 2007 as Vice President of Finance and Corporate Controller and in February 2009, 
was appointed Chief Accounting Officer of Juniper Networks. Before joining Juniper Networks, Mr. Zamiska was at HP from February 1989 
through November 2007, where he served in various roles in the finance department, most recently serving as Senior Director of Finance - 
Controller for HP's consulting and integration division and HP's Senior Director of Finance - Assistant Corporate Controller. Prior to HP, 
Mr. Zamiska was at Arthur Anderson & Company where he served in various roles in the audit and assurance practice. Mr. Zamiska is a 
Certified Public Accountant (inactive) and holds a bachelor's degree in Business-Accounting from the University of Illinois, 
Champaign-Urbana. 

Available Information 

We file our annual reports on Form 10-K, quarterly reports on Form 10-Q, and current reports on Form 8-K pursuant to Section 13(a) or 
15(d) of the Securities Exchange Act of 1934, as amended, with the U.S. Securities and Exchange Commission (the “SEC”) electronically. 
The public may read or copy any materials we file with the SEC at the SEC's Public Reference Room at 100 F Street, NE, Washington, DC 
20549. The public may obtain information on the operation of the Public Reference Room by calling the SEC at 1-800-SEC-0330. The SEC 
maintains a website that contains reports, proxy and information statements, and other information regarding issuers, including Juniper 
Networks, that file electronically with the SEC. The address of that website is http://www.sec.gov. 

You may obtain a free copy of our annual reports on Form 10-K, quarterly reports on Form 10-Q, current reports on Form 8-K, and 
amendments to those reports on our website at http://www.juniper.net, by contacting the Investor Relations Department at our corporate 
offices by calling 1-888-586-4737, or by sending an e-mail message to investor-relations@juniper.net. Such reports and other information are 
available on our website when they are available on the SEC website. Our Corporate Governance Standards, the charters of our Audit 
Committee, Compensation Committee, Stock Committee, and Nominating and Corporate Governance Committee, as well as our Worldwide 
Code of Business Conduct and Ethics are also available on our website. Information on our website is not a part of this Annual Report on 
Form 10-K. 

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ITEM 1A.      Risk Factors 

Factors That May Affect Future Results 

Investments in our securities involve significant risks. The market price of our stock has historically reflected a higher multiple of earnings 
than many other companies. Accordingly, even small changes in investor expectations for our future growth and earnings, whether as a result 
of actual or rumored financial or operating results, changes in the mix of the products and services sold, acquisitions, industry changes, or 
other factors, could trigger, and have triggered in the past, significant fluctuations in the market price of our common stock. Investors in our 
securities should carefully consider all of the relevant factors, including, but not limited to, the following factors, that could affect our stock 
price. 

Our quarterly results are unpredictable and subject to substantial fluctuations, and, as a result, we may fail to meet the expectations of 
securities analysts and investors, which could adversely affect the trading price of our common stock. 

Our revenues and operating results may vary significantly from quarter-to-quarter due to a number of factors, many of which are outside of 
our control and any of which may cause our stock price to fluctuate. 

The factors that may cause our quarterly results to be unpredictable include, but are not limited to: limited visibility into customer spending 
plans, changes in the mix of products and services sold, changes in geographies in which our products and services are sold, changing market 
conditions, current and potential customer consolidation, competition, customer concentration, long sales and implementation cycles, regional 
economic and political conditions, and seasonality. For example, many companies in our industry experience adverse seasonal fluctuations in 
customer spending, particularly in the first and third quarters. 

As a result of these risk factors, we believe that quarter-to-quarter comparisons of operating results are not necessarily a good indication of 
what our future performance will be. It is likely that in some future quarters, our operating results may be below the expectations of securities 
analysts or investors, in which case the price of our common stock may decline. Such a decline could occur, and has occurred in the past, 
even when we have met our publicly stated revenues and/or earnings guidance. 

Fluctuating economic conditions make it difficult to predict revenues for a particular period and a shortfall in revenues or increase in 
costs of production may harm our operating results. 

Our revenues depend significantly on general economic conditions and the demand for products in the markets in which we compete. 
Economic weakness, customer financial difficulties, and constrained spending on network expansion and enterprise infrastructure have 
resulted in certain historical periods, and may in the future result, in decreased revenues and earnings and could make it difficult to forecast 
sales and operating results and could negatively affect our ability to provide forecasts to our contract manufacturers and manage our contract 
manufacturer relationships and other expenses. In addition, the recent recession and economic weakness, particularly in the United States and 
Europe, as well as turmoil in the geopolitical environment in many parts of the world, may continue to put pressure on global economic 
conditions, which could lead to reduced demand for our products and/or higher costs of production. Continued economic weakness may also 
lead to longer collection cycles for payments due from our customers, an increase in customer bad debt, restructuring initiatives and 
associated expenses, and impairment of investments. Furthermore, the continued weakness and uncertainty in worldwide credit markets may 
adversely impact the ability of our customers to adequately fund their expected capital expenditures, which could lead to delays or 
cancellations of planned purchases of our products or services. In addition, our operating expenses are largely based on anticipated revenue 
trends and a high percentage of our expenses is, and will continue to be, fixed in the short and medium term. 

Uncertainty about future economic conditions makes it difficult to forecast operating results and to make decisions about future investments. 
Future or continued economic weakness, failure of our customers and markets to recover from such weakness, customer financial difficulties, 
increases in costs of production, and reductions in spending on network maintenance and expansion could have a material adverse effect on 
demand for our products and consequently on our business, financial condition, and results of operations. 

A limited number of our customers comprise a significant portion of our revenues and any decrease in revenues from these customers 
could have an adverse effect on our net revenues and operating results. 

A substantial majority of our net revenues depend on sales to a limited number of customers and distribution partners. For example, Verizon 
accounted for greater than 10% of our net revenues for the year ended December 31, 2010. Changes in the 

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business requirements, vendor selection, financial prospects, capital resources, or purchasing behavior of our key customers could 
significantly decrease sales to such customers or could lead to delays or cancellations of planned purchases of our products or services, which 
increases the risk of quarterly fluctuations in our revenues and operating results. Any of these factors could adversely affect our business, 
financial condition, and results of operations. 

In addition, in recent years, there has been consolidation in the telecommunications industry (for example, the acquisitions of AT&T, Inc., 
MCI, Inc., and BellSouth Corporation). If our customers or partners are parties to consolidation transactions they may suspend or indefinitely 
reduce their purchases of our products or other unforeseen consequences could harm our business, financial condition, and results of 
operations. 

If we receive product orders late in a quarter, we may be unable to recognize revenue for these orders in the same period, which could 
adversely affect our quarterly revenues. 

Generally, our Infrastructure products are not stocked by distributors or resellers due to their cost and complexity and configurations required 
by our customers, and we generally build such products as orders are received. In recent years, the volume of orders received late in any 
given fiscal quarter has generally continued to increase but remains unpredictable. If orders for certain products are received late in any 
quarter, we may not be able to build, ship, and recognize revenue for these orders in the same period, which could adversely affect our ability 
to meet our expected revenues for such quarter. Additionally, we determine our operating expenses largely on the basis of anticipated 
revenues and a high percentage of our expenses are fixed in the short and medium term. As a result, a failure or delay in generating or 
recognizing revenue could cause significant variations in our operating results and operating margin from quarter-to-quarter. 

The long sales and implementation cycles for our products, as well as our expectation that some customers will sporadically place large 
orders with short lead times, may cause our revenues and operating results to vary significantly from quarter-to-quarter. 

A customer's decision to purchase certain of our products involves a significant commitment of its resources and a lengthy evaluation and 
product qualification process. As a result, the sales cycle may be lengthy. In particular, customers making critical decisions regarding the 
design and implementation of large network deployments may engage in very lengthy procurement processes that may delay or impact 
expected future orders. Throughout the sales cycle, we may spend considerable time educating and providing information to prospective 
customers regarding the use and benefits of our products. Even after making the decision to purchase, customers may deploy our products 
slowly and deliberately. Timing of deployment can vary widely and depends on the skill set of the customer, the size of the network 
deployment, the complexity of the customer's network environment, and the degree of hardware and operating system configuration 
necessary to deploy the products. Customers with large networks usually expand their networks in large increments on a periodic basis. 
Accordingly, we may receive purchase orders for significant dollar amounts on an irregular basis. These long cycles, as well as our 
expectation that customers will tend to sporadically place large orders with short lead times, may cause revenues and operating results to vary 
significantly and unexpectedly from quarter-to-quarter. 

We face intense competition that could reduce our revenues and adversely affect our business and financial results. 

Competition is intense in the markets that we address. The Infrastructure market has historically been dominated by Cisco with competition 
coming from other companies such as Alcatel-Lucent, Brocade, Extreme Networks, Hewlett Packard Company, and Huawei. In the SLT 
market, we face intense competition from a broader group of companies such as CheckPoint, Cisco, F5 Networks, and Riverbed. In addition, 
a number of other small public and private companies have products or have announced plans for new products to address the same 
challenges and markets that our products address. 

In addition, actual or speculated consolidation among competitors, or the acquisition of our partners and/or resellers by competitors, can 
increase the competitive pressures faced by us as customers may delay spending decisions. In this regard, Ericsson acquired Redback in 2007, 
and Brocade acquired Foundry Networks in 2009. A number of our competitors have substantially greater resources and can offer a wider 
range of products and services for the overall network equipment market than we do. If we are unable to compete successfully against 
existing and future competitors on the basis of product offerings or price, we could experience a loss in market share and revenues and/or be 
required to reduce prices, which could reduce our gross margins, and which could materially and adversely affect our business, financial 
condition, and results of operations. 

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We rely on value-added and other resellers, distribution partners, and OEM partners to sell our products, and disruptions to, or our 
failure to effectively develop and manage our distribution channel and the processes and procedures that support it could adversely affect 
our ability to generate revenues from the sale of our products. 

Our future success is highly dependent upon establishing and maintaining successful relationships with a variety of value-added and other 
reseller and distribution partners, including our worldwide strategic partners such as Ericsson, IBM, and NSN. The majority of our revenues 
are derived through value-added resellers and distributors, most of which also sell our competitors’ products. Our revenues depend in part on 
the performance of these partners. The loss of or reduction in sales to our value-added resellers or distributors could materially reduce our 
revenues. For example, in 2006, one of our largest resellers, Lucent, merged with Alcatel, a competitor of ours. As a result of the merger, 
Alcatel became a competitor, their resale of our products declined, and we ultimately terminated our reseller agreement with Alcatel. Our 
competitors may in some cases be effective in providing incentives to current or potential resellers and distributors to favor their products or 
to prevent or reduce sales of our products. If we fail to develop and maintain relationships with our partners, fail to develop new relationships 
with value-added resellers and distributors in new markets, or expand the number of distributors and resellers in existing markets, fail to 
manage, train or motivate existing value-added resellers and distributors effectively, or if these partners are not successful in their sales 
efforts, sales of our products may decrease, and our business, financial condition, and results of operations would suffer. 

In addition, we recognize a portion of our revenues based on a sell-through model using information provided by our distributors. If those 
distributors provide us with inaccurate or untimely information, the amount or timing of our revenues could be adversely impacted. 

Further, in order to develop and expand our distribution channel, we must continue to scale and improve our processes and procedures that 
support it, and those processes and procedures may become increasingly complex and inherently difficult to manage. For example, in 2009, 
we entered into an agreement to form a joint venture with NSN to develop and resell joint carrier Ethernet solutions and entered into OEM 
agreements with Dell and IBM pursuant to which they rebrand and resell our products as part of their product portfolios. These relationships 
are complex and require additional processes and procedures that may be challenging and costly to implement, maintain and manage. Our 
failure to successfully manage and develop our distribution channel and the processes and procedures that support it could adversely affect 
our ability to generate revenues from the sale of our products. 

Governmental regulations affecting the import or export of products or affecting products containing encryption capabilities could 
negatively affect our revenues. 

The United States and various foreign governments have imposed controls, export license requirements, and restrictions on the import or 
export of some technologies, especially encryption technology. In addition, from time to time, governmental agencies have proposed 
additional regulation of encryption technology, such as requiring certification, notifications, review of source code, or the escrow and 
governmental recovery of private encryption keys. For example, Russia and China recently have implemented new requirements relating to 
products containing encryption and India has imposed special warranty and other obligations associated with technology deemed critical. 
Governmental regulation of encryption technology and regulation of imports or exports, or our failure to obtain required import or export 
approval for our products, could harm our international and domestic sales and adversely affect our revenues. In addition, failure to comply 
with such regulations could result in penalties, costs, and restrictions on import or export privileges or adversely affect sales to government 
agencies or government funded projects. 

Our ability to process orders and ship products in a timely manner is dependent in part on our business systems and performance of the 
systems and processes of third parties such as our contract manufacturers, suppliers, or other partners, as well as the interfaces between 
our systems and the systems of such third parties. If our systems, the systems and processes of those third parties, or the interfaces 
between them experience delays or fail, our business processes and our ability to build and ship products could be impacted, and our 
financial results could be harmed. 

Some of our business processes depend upon our IT systems, the systems, and processes of third parties, and on the interfaces of our systems 
with the systems of third parties. For example, our order entry system feeds information into the systems of our contract manufacturers, 
which enables them to build and ship our products. If those systems fail or are interrupted, our processes may function at a diminished level 
or not at all. This could negatively impact our ability to ship products or otherwise operate our business, and our financial results could be 
harmed. For example, although it did not adversely affect our shipments, an earthquake in late December of 2006 disrupted our 
communications with China, where a significant part of our manufacturing occurs. 

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We also rely upon the performance of the systems and processes of our contract manufacturers to build and ship our products. If those 
systems and processes experience interruption or delay, our ability to build and ship our products in a timely manner may be harmed. For 
example, as we have expanded our contract manufacturing base to China, we have experienced instances where our contract manufacturer 
was not able to ship products in the time periods expected by us. If we are not able to ship our products or if product shipments are delayed, 
our ability to recognize revenue in a timely manner for those products would be affected and our financial results could be harmed. 

Upgrades to key internal systems and processes, and problems with the design or implementation of these systems and processes could 
interfere with, and therefore harm, our business and operations. 

We previously initiated a multi-year project to upgrade certain key internal systems and processes, including our company-wide human 
resources management system, our customer relationship management (“CRM”) system and enterprise resource planning (“ERP”) system. In 
the first quarter of 2010, we implemented a major upgrade of our CRM system. We have invested, and will continue to invest, significant 
capital and human resources in the design and implementation of these systems and processes. Any disruptions or delays in the design and 
implementation of the new systems or processes, particularly any disruptions or delays that impact our operations, could adversely affect our 
ability to process customer orders, ship products, provide service and support to our customers, bill and track our customers, fulfill 
contractual obligations, record and transfer information in a timely and accurate manner, file SEC reports in a timely manner, or otherwise 
run our business. Even if we do not encounter these adverse effects, the design and implementation of these new systems and processes may 
be much more costly than we anticipated. If we are unable to successfully design and implement these new systems and processes as planned, 
or if the implementation of these systems and processes is more costly than anticipated, our business, financial condition, and results of 
operations could be negatively impacted. 

We expect our gross margin to vary over time, and our recent level of product gross margin may not be sustainable. 

We expect our product gross margins to vary from quarter-to-quarter, and the gross margins we have recently achieved may not be 
sustainable and may be adversely affected in the future by numerous factors, including product mix shifts, increased price competition in one 
or more of the markets in which we compete, increases in material or labor costs, excess product component or obsolescence charges from 
our contract manufacturers, increased costs due to changes in component pricing or charges incurred due to component holding periods if we 
do not accurately forecast product demand, warranty related issues, or our introduction of new products or entry into new markets with 
different pricing and cost structures. 

We are dependent on sole source and limited source suppliers for several key components, which makes us susceptible to shortages or 
price fluctuations in our supply chain, and we may face increased challenges in supply chain management in the future. 

During periods of high demand for electronic products, component shortages are possible, and the predictability of the availability of such 
components may be limited. Any future growth in our business and the economy is likely to create greater pressures on us and our suppliers 
to accurately forecast overall component demand and to establish optimal component levels. If shortages or delays persist, the price of these 
components may increase, or the components may not be available at all. We may not be able to secure enough components at reasonable 
prices or of acceptable quality to build new products in a timely manner, and our revenues and gross margins could suffer until other sources 
can be developed. For example, from time to time, including the first quarter of 2008, we experienced component shortages that resulted in 
delays of product shipments. We currently purchase numerous key components, including ASICs, from single or limited sources. The 
development of alternate sources for those components is time-consuming, difficult, and costly. In addition, the lead times associated with 
certain components are lengthy and preclude rapid changes in quantities and delivery schedules. In the event of a component shortage or 
supply interruption from these suppliers, we may not be able to develop alternate or second sources in a timely manner. If we are unable to 
buy these components in quantities sufficient to meet our requirements on a timely basis, we will not be able to deliver product to our 
customers, which would seriously affect present and future sales, which would, in turn, adversely affect our business, financial condition, and 
results of operations. 

In addition, the development, licensing, or acquisition of new products in the future may increase the complexity of supply chain 
management. Failure to effectively manage the supply of key components and products would adversely affect our business. 

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If we do not successfully anticipate market needs and opportunities, and develop products and product enhancements that meet those 
needs and opportunities, or if those products are not made available in a timely manner or do not gain market acceptance, we may not be 
able to compete effectively and our ability to generate revenues will suffer. 

We cannot guarantee that we will be able to anticipate future market needs and opportunities or be able to develop new products or product 
enhancements to meet such needs or opportunities in a timely manner or at all. If we fail to anticipate market requirements or fail to develop 
and introduce new products or product enhancements to meet those needs in a timely manner, it could cause us to lose customers and such 
failure could substantially decrease or delay market acceptance and sales of our present and future products, which would significantly harm 
our business, financial condition, and results of operations. Even if we are able to anticipate, develop, and commercially introduce new 
products and enhancements, there can be no assurance that new products or enhancements will achieve widespread market acceptance. 

For example, in 2010, in connection with the acquisitions of Altor and Trapeze, we are now offering a WLAN product and a virtualization 
security product. Additionally, in 2009, we announced plans to develop and introduce new data center products with our Project Stratus and 
mobility solutions with our Project Falcon. If these or other new products do not gain market acceptance at a sufficient rate of growth, our 
ability to meet future financial targets may be adversely affected. In addition, if we fail to achieve market acceptance at a sufficient rate of 
growth, our ability to meet future financial targets and aspirations may be adversely affected. In addition, if we fail to deliver new or 
announced products to the market in a timely manner, it could adversely affect the market acceptance of those products and harm our 
competitive position and our business and financial results. 

Changes in effective tax rates or adverse outcomes resulting from examination of our income or other tax returns could adversely affect 
our results. 

Our future effective tax rates could be subject to volatility or adversely affected by: earnings being lower than anticipated in countries where 
we have lower statutory rates and higher than anticipated earnings in countries where we have higher statutory rates; changes in the valuation 
of our deferred tax assets and liabilities; expiration of, or lapses in, the R&D tax credit laws applicable to us; transfer pricing adjustments 
related to certain acquisitions, including the license of acquired intangibles under our intercompany R&D cost sharing arrangement; tax 
effects of share-based compensation; costs related to intercompany restructurings; or changes in tax laws, regulations, accounting principles, 
or interpretations thereof. In addition, we are subject to the continuous examination of our income tax returns by the Internal Revenue Service 
(“IRS”) and other tax authorities. We regularly assess the likelihood of adverse outcomes resulting from these examinations to determine the 
adequacy of our provision for income taxes. There can be no assurance that the outcomes from these continuous examinations will not have 
an adverse effect on our business, financial condition, and results of operations. 

For example, in 2009, we received a proposed adjustment from the IRS claiming that we owe additional taxes, plus interest and possible 
penalties, for the 2004 tax year based on a transfer pricing transaction related to the license of acquired intangibles under an intercompany 
R&D cost sharing arrangement. As a result of the proposed adjustment, the incremental tax liability would be approximately $807 million 
excluding interest and penalties. We believe the IRS’ position with regard to this matter is inconsistent with applicable tax laws and existing 
Treasury regulations, and that our previously reported income tax provision for the year in question is appropriate. However, there can be no 
assurance that this matter will be resolved in our favor. Regardless of whether this matter is resolved in our favor, the final resolution of this 
matter could be expensive and time-consuming to defend and/or settle. While we believe we have provided adequately for this matter, there is 
a possibility that an adverse outcome of the matter could have a material effect on our results of operations and financial condition. 

Telecommunications companies and our other large customers generally require more onerous terms and conditions in our contracts 
with them. As we seek to sell more products to such customers, we may be required to agree to terms and conditions that could have an 
adverse effect on our business or ability to recognize revenues. 

Telecommunications service provider companies and other large companies, because of their size, generally have greater purchasing power 
and, accordingly, have requested and received more favorable terms, which often translate into more onerous terms and conditions from us. 
As we seek to sell more products to this class of customer, we may be required to agree to such terms and conditions, which may include 
terms that affect the timing of our ability to recognize revenue and have an adverse effect on our business, financial condition, and results of 
operations. Consolidation among such large customers can further increase their buying power and ability to require onerous terms. 

For example, customers in this class have purchased products from other vendors who promised but failed to deliver certain functionality 
and/or had products that caused problems or outages in the networks of these customers. As a result, this class of 

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customers may request additional features from us and require substantial penalties for failure to deliver such features or may require 
substantial penalties for any network outages that may be caused by our products. These additional requests and penalties, if we are required 
to agree to them, may require us to defer revenue recognition from such sales, which may negatively affect our business, financial condition, 
and results of operations. 

If we fail to accurately predict our manufacturing requirements, we could incur additional costs or experience manufacturing delays, 
which would harm our business. 

We provide demand forecasts to our contract manufacturers and the manufacturers order components and plan capacity based on these 
forecasts. If we overestimate our requirements, our contract manufacturers may assess charges, or we may have liabilities for excess 
inventory, each of which could negatively affect our gross margins. Conversely, because lead times for required materials and components 
vary significantly and depend on factors such as the specific supplier, contract terms, and the demand for each component at a given time, if 
we underestimate our requirements, as we did in the third quarter of 2010 with respect to certain components, our contract manufacturers may 
have inadequate time, materials, and/or components required to produce our products, which could increase costs or could delay or interrupt 
manufacturing of our products and result in delays in shipments and deferral or loss of revenues. 

We are dependent on contract manufacturers with whom we do not have long-term supply contracts, and changes to those relationships, 
expected or unexpected, may result in delays or disruptions that could cause us to lose revenues and damage our customer relationships. 

We depend on independent contract manufacturers (each of which is a third-party manufacturer for numerous companies) to manufacture our 
products. Although we have contracts with our contract manufacturers, these contracts do not require them to manufacture our products on a 
long-term basis in any specific quantity or at any specific price. In addition, it is time-consuming and costly to qualify and implement 
additional contract manufacturer relationships. Therefore, if we fail to effectively manage our contract manufacturer relationships or if one or 
more of them experiences delays, disruptions, or quality control problems in our manufacturing operations, or if we had to change or add 
additional contract manufacturers or contract manufacturing sites, our ability to ship products to our customers could be delayed. Also, the 
addition of manufacturing locations or contract manufacturers would increase the complexity of our supply chain management. Moreover, an 
increasing portion of our manufacturing is performed in China and other countries and is therefore subject to risks associated with doing 
business in other countries. Each of these factors could adversely affect our business, financial condition, and results of operations. 

Integration of acquisitions could disrupt our business and harm our financial condition and stock price and may dilute the ownership of 
our stockholders. 

We have made, and may continue to make, acquisitions in order to enhance our business. For example, in December 2010 we acquired Altor 
and Trapeze, in July 2010 we acquired SMobile, and in April 2010 we acquired Ankeena. Acquisitions involve numerous risks, including 
problems combining the purchased operations, technologies or products, unanticipated costs, diversion of management's attention from our 
core businesses, adverse effects on existing business relationships with suppliers and customers, risks associated with entering markets in 
which we have no or limited prior experience, and potential loss of key employees. There can be no assurance that we will be able to 
integrate successfully any businesses, products, technologies, or personnel that we might acquire. The integration of businesses that we may 
acquire is likely to be a complex, time-consuming, and expensive process. Acquisitions may also require us to issue common stock or assume 
equity awards that dilute the ownership of our current stockholders, assume liabilities, record goodwill and amortizable intangible assets that 
will be subject to impairment testing on a regular basis and potential periodic impairment charges, incur amortization expenses related to 
certain intangible assets, and incur large and immediate write-offs and restructuring and other related expenses, all of which could harm our 
financial condition and results of operations. 

In addition, if we fail in any acquisition integration efforts and are unable to efficiently operate as a combined organization utilizing common 
information and communication systems, operating procedures, financial controls, and human resources practices, our business, financial 
condition, and results of operations may be adversely affected. 

Our ability to develop, market, and sell products could be harmed if we are unable to retain or hire key personnel. 

Our future success depends upon our ability to recruit and retain the services of executive, engineering, sales and marketing, and support 
personnel. The supply of highly qualified individuals, in particular engineers in very specialized technical areas, or sales people specializing 
in the service provider and enterprise markets, is limited and competition for such individuals is 

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intense. None of our officers or key employees is bound by an employment agreement for any specific term. The loss of the services of any of 
our key employees, the inability to attract or retain personnel in the future or delays in hiring required personnel, particularly engineers and 
sales people, and the complexity and time involved in replacing or training new employees, could delay the development and introduction of 
new products, and negatively impact our ability to market, sell, or support our products. 

We are a party to lawsuits, which are costly to defend and, if determined adversely to us, could require us to pay damages or prevent us 
from taking certain actions, any or all of which could harm our business, financial condition, and results of operations. 

We, and certain of our current and former officers and current and former members of our Board of Directors, are subject to various lawsuits. 
We have been served with lawsuits related to patent infringement as well as securities laws, a description of which can be found in Note 15, 
Commitments and Contingencies, in Notes to Consolidated Financial Statements of this Annual Report on Form 10-K, under the heading 
“Legal Proceedings.” There can be no assurance that these or any actions that have been or may be brought against us, our officers, and our 
directors will be resolved favorably or that tentative settlements will become final. Regardless of whether they are resolved, these lawsuits 
are, and any future lawsuits to which we, our officers, or our directors may become a party will likely be, expensive and time-consuming to 
defend, settle, and/or resolve. Such costs of defense, as well as any losses resulting from these claims or settlement of these claims, could 
significantly increase our expenses and could harm our business, financial condition, and results of operations. 

Litigation or claims regarding intellectual property rights may be time-consuming, expensive, and require a significant amount of 
resources to prosecute, defend, or make our products non-infringing. 

Third parties have asserted and may in the future assert claims or initiate litigation related to patent, copyright, trademark, and other 
intellectual property rights to technologies and related standards that are relevant to our products. The asserted claims and/or initiated 
litigation may include claims against us or our manufacturers, suppliers, partners, or customers, alleging that our products or services infringe 
proprietary rights. Regardless of the merit of these claims, they have been and can be time-consuming, result in costly litigation, and may 
require us to develop non-infringing technologies or enter into license agreements. Furthermore, because of the potential for high awards of 
damages or injunctive relief that are not necessarily predictable, even arguably unmeritorious claims may be settled for significant amounts of 
money. If any infringement or other intellectual property claim made against us by any third-party is successful, if we are required to settle 
litigation for significant amounts of money, or if we fail to develop non-infringing technology or license required proprietary rights on 
commercially reasonable terms and conditions, our business, financial condition, and results of operations could be materially and adversely 
affected. 

Our success depends upon our ability to effectively plan and manage our resources and restructure our business through rapidly 
fluctuating economic and market conditions. 

Our ability to successfully offer our products and services in a rapidly evolving market requires an effective planning, forecasting, and 
management process to enable us to effectively scale and adjust our business in response to fluctuating market opportunities and conditions. 
In periods of market expansion, we have increased investment in our business by, for example, increasing headcount and increasing our 
investment in R&D, sales and marketing, and other parts of our business as we have in the year ended December 31, 2010. Conversely, 
during 2009, in response to downward trending industry and market conditions, we restructured our business, rebalanced our workforce, and 
reduced our real estate portfolio. Many of our expenses, such as real estate expenses, cannot be rapidly or easily adjusted because of 
fluctuations in our business or numbers of employees. Moreover, rapid changes in the size of our workforce could adversely affect our ability 
to develop and deliver products and services as planned or impair our ability to realize our current or future business objectives. 

Regulation of the telecommunications industry could harm our operating results and future prospects. 

The traditional telecommunications industry is highly regulated, and our business and financial condition could be adversely affected by 
changes in regulations relating to the Internet telecommunications industry. Currently, there are few laws or regulations that apply directly to 
access to or commerce on IP networks. We could be adversely affected by regulation of IP networks and commerce in any country where we 
market equipment and services to service or content providers. Regulations governing the range of services and business models that can be 
offered by service providers or content providers could adversely affect those customers' needs for products designed to enable a wide range 
of such services or business models. For instance, the U.S. Federal Communications Commission has issued regulations governing aspects of 
fixed broadband networks and wireless networks; these regulations might impact service provider and content provider business models and 
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providers' needs for Internet telecommunications equipment and services. 

In addition, environmental regulations relevant to electronic equipment manufacturing or operations may impact our business and financial 
condition adversely. For instance, the European Union has adopted WEEE, ROHS and REACH regulations. In addition, some governments 
have regulations prohibiting government entities from purchasing security products that do not meet specified indigenous certification criteria 
even though those criteria may be in conflict with accepted international standards. Similar regulations are in effect or under consideration in 
several jurisdictions where we do business. The adoption and implementation of such regulations could decrease demand for our products, 
increase the cost of building and selling our products and impact our ability to ship products into affected areas and recognize revenue in a 
timely manner. Any of these impacts could have a material adverse effect on our business, financial condition, and results of operations. 

A breach of network security could harm public perception of our security products, which could cause us to lose revenues. 

If an actual or perceived breach of network security occurs in our network or in the network of a customer of our security products, regardless 
of whether the breach is attributable to our products, the market perception of the effectiveness of our products could be harmed. Because the 
techniques used by computer hackers to access or sabotage networks change frequently and generally are not recognized until launched 
against a target, we may be unable to anticipate these techniques. This could cause us to lose current and potential end-customers or cause us 
to lose current and potential value-added resellers and distributors. 

We are subject to risks arising from our international operations, which may adversely affect our business, financial condition, and 
results of operations. 

We derive a majority of our revenues from our international operations, and we plan to continue expanding our business in international 
markets in the future. We conduct significant sales and customer support operations directly and indirectly through our distributors and 
value-added resellers in countries throughout the world and depend on the operations of our contract manufacturers and suppliers that are 
located outside of the United States. In addition, a portion of our R&D and our general and administrative operations are conducted outside 
the United States. 

As a result of our international operations, we are affected by economic, regulatory, social, and political conditions in foreign countries, 
including changes in general IT spending, the imposition of government controls, changes or limitations in trade protection laws, other 
regulatory requirements, which may affect our ability to import or export our products from various countries, service provider and 
government spending patterns affected by political considerations, unfavorable changes in tax treaties or laws, natural disasters, epidemic 
disease, labor unrest, earnings expatriation restrictions, misappropriation of intellectual property, military actions, acts of terrorism, political 
and social unrest and difficulties in staffing and managing international operations. In particular, in some countries, we may experience 
reduced intellectual property protection. Any or all of these factors could have a material adverse impact on our business, financial condition, 
and results of operations. 

Moreover, local laws and customs in many countries differ significantly from those in the United States. In many foreign countries, 
particularly in those with developing economies, it is common for others to engage in business practices that are prohibited by our internal 
policies and procedures or United States regulations applicable to us. There can be no assurance that our employees, contractors, and agents 
will not take actions in violation of our policies and procedures, which are designed to ensure compliance with U.S. and foreign laws and 
policies. Violations of laws or key control policies by our employees, contractors, or agents could result in financial reporting problems, 
fines, penalties, or prohibition on the importation or exportation of our products, and could have a material adverse effect on our business, 
financial condition and results of operations. 

We are exposed to fluctuations in currency exchange rates, which could negatively affect our financial condition and results of 
operations. 

Because a majority of our business is conducted outside the United States, we face exposure to adverse movements in non-U.S. currency 
exchange rates. These exposures may change over time as business practices evolve and could have a material adverse impact on our 
financial condition and results of operations. 

The majority of our revenues and expenses are transacted in U.S. Dollars. We also have some transactions that are denominated in foreign 
currencies, primarily the British Pound, Euro, Indian Rupee, and Japanese Yen related to our sales and service operations outside of the 
United States. An increase in the value of the U.S. Dollar could increase the real cost to our customers of our products in those markets 
outside the United States in which we sell in U.S. Dollars, and a weakened U.S. Dollar could 

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increase the cost of local operating expenses and procurement of raw materials to the extent we must purchase components in foreign 
currencies. 

Currently, we hedge only those currency exposures associated with certain assets and liabilities denominated in nonfunctional currencies and 
periodically hedge anticipated foreign currency cash flows. The hedging activities undertaken by us are intended to offset the impact of 
currency fluctuations on certain nonfunctional currency assets and liabilities. However, no amount of hedging can be effective against all 
circumstances, including long-term declines in the value of the U.S. Dollar. If our attempts to hedge against these risks are not successful, or 
if long-term declines in the value of the U.S. Dollar persist, our financial condition and results of operations could be adversely impacted. 

If we fail to adequately evolve our financial and managerial control and reporting systems and processes, our ability to manage and grow 
our business will be negatively affected. 

Our ability to successfully offer our products and implement our business plan in a rapidly evolving market depends upon an effective 
planning and management process. We will need to continue to improve our financial and managerial control and our reporting systems and 
procedures in order to manage our business effectively in the future. If we fail to continue to implement improved systems and processes, our 
ability to manage our business, financial condition, and results of operations may be negatively affected. 

We sell our products to customers that use those products to build networks and IP infrastructure, and if the demand for network and IP 
systems does not continue to grow, then our business, financial condition, and results of operations could be adversely affected. 

A substantial portion of our business and revenues depends on the growth of secure IP infrastructure and on the deployment of our products 
by customers that depend on the continued growth of IP services. As a result of changes in the economy capital spending or the building of 
network capacity in excess of demand, all of which have in the past particularly affected telecommunications service providers, spending on 
IP infrastructure can vary, which could have a material adverse effect on our business, financial condition, and results of operations. In 
addition, a number of our existing customers are evaluating the build out of their next generation networks. During the decision-making 
period when the customers are determining the design of those networks and the selection of the equipment they will use in those networks, 
such customers may greatly reduce or suspend their spending on secure IP infrastructure. Such delays in purchases can make it more difficult 
to predict revenues from such customers, can cause fluctuations in the level of spending by these customers and, even where our products are 
ultimately selected, can have a material adverse effect on our business, financial condition, and results of operations. 

Our products are highly technical and if they contain undetected errors, our business could be adversely affected, and we may need to 
defend lawsuits or pay damages in connection with any alleged or actual failure of our products and services. 

Our products are highly technical and complex, are critical to the operation of many networks, and, in the case of our security products, 
provide and monitor network security and may protect valuable information. Our products have contained and may contain one or more 
undetected errors, defects, or security vulnerabilities. Some errors in our products may only be discovered after a product has been installed 
and used by end-customers. Any errors, defects, or security vulnerabilities discovered in our products after commercial release could result in 
loss of revenues or delay in revenue recognition, loss of customers, loss of future business and reputation, and increased service and warranty 
cost, any of which could adversely affect our business, financial condition, and results of operations. In addition, in the event an error, defect, 
or vulnerability is attributable to a component supplied by a third-party vendor, we may not be able to recover from the vendor all of the costs 
of remediation that we may incur. In addition, we could face claims for product liability, tort, or breach of warranty. Defending a lawsuit, 
regardless of its merit, is costly and may divert management’s attention. In addition, if our business liability insurance coverage is inadequate, 
or future coverage is unavailable on acceptable terms or at all, our financial condition and results of operations could be harmed. 

If our products do not interoperate with our customers’ networks, installations will be delayed or cancelled and could harm our business. 

Our products are designed to interface with our customers’ existing networks, each of which have different specifications and utilize multiple 
protocol standards and products from other vendors. Many of our customers’ networks contain multiple generations of products that have 
been added over time as these networks have grown and evolved. Our products must interoperate with many or all of the products within 
these networks as well as future products in order to meet our customers’ requirements. If we find errors in the existing software or defects in 
the hardware used in our customers’ networks, we may 

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need to modify our software or hardware to fix or overcome these errors so that our products will interoperate and scale with the existing 
software and hardware, which could be costly and could negatively affect our business, financial condition, and results of operations. In 
addition, if our products do not interoperate with those of our customers’ networks, demand for our products could be adversely affected or 
orders for our products could be cancelled. This could hurt our operating results, damage our reputation, and seriously harm our business and 
prospects. 

Our products incorporate and rely upon licensed third-party technology, and if licenses of third-party technology do not continue to be 
available to us or become very expensive, our revenues and ability to develop and introduce new products could be adversely affected. 

We integrate licensed third-party technology into certain of our products. From time to time, we may be required to license additional 
technology from third-parties to develop new products or product enhancements. Third-party licenses may not be available or continue to be 
available to us on commercially reasonable terms. The failure to comply with the terms of any license may result in our inability to continue 
to use such license. Our inability to maintain or re-license any third-party licenses required in our products or our inability to obtain 
third-party licenses necessary to develop new products and product enhancements, could require us, if possible, to develop substitute 
technology or obtain substitute technology of lower quality or performance standards or at a greater cost, any of which could delay or prevent 
product shipment and harm our business, financial condition, and results of operations. 

Our financial condition and results of operations could suffer if there is an additional impairment of goodwill or other intangible assets 
with indefinite lives. 

We are required to test annually and review on an interim basis, our goodwill and intangible assets with indefinite lives, including the 
goodwill associated with past acquisitions and any future acquisitions, to determine if impairment has occurred. As of December 31, 2010, 
our goodwill was $3,927.8 million. If such assets are deemed impaired, an impairment loss equal to the amount by which the carrying amount 
exceeds the fair value of the assets would be recognized. This would result in incremental expenses for that quarter, which would reduce any 
earnings or increase any loss for the period in which the impairment was determined to have occurred. For example, such impairment could 
occur if the market value of our common stock falls below certain levels for a sustained period, or if the portions of our business related to 
companies we have acquired fail to grow at expected rates or decline. In the second quarter of 2006, our impairment evaluation resulted in a 
reduction of $1,280.0 million to the carrying value of goodwill on our balance sheet for the SLT operating segment, primarily due to the 
decline in our market capitalization that occurred over a period of approximately nine months prior to the impairment review and, to a lesser 
extent, a decrease in forecasted future cash flows. In recent years, economic weakness contributed to extreme price and volume fluctuations 
in global stock markets that reduced the market price of many technology company stocks, including ours. Future declines in our stock price, 
as well as any marked decline in our level of revenues or gross margins, increase the risk that goodwill and intangible assets may become 
impaired in future periods. We cannot accurately predict the amount and timing of any impairment of assets. 

While we believe that we currently have adequate internal control over financial reporting, we are exposed to risks from legislation 
requiring companies to evaluate those internal controls. 

Section 404 of the Sarbanes-Oxley Act of 2002 requires our management to report on, and our independent auditors to attest to, the 
effectiveness of our internal control over financial reporting. We have an ongoing program to perform the system and process evaluation and 
testing necessary to comply with these requirements. We have and will continue to incur significant expenses and devote management 
resources to Section 404 compliance on an ongoing basis. In the event that our Chief Executive Officer, Chief Financial Officer, or 
independent registered public accounting firm determine in the future that, our internal controls over financial reporting are not effective as 
defined under Section 404, investor perceptions may be adversely affected if our financial statements are not reliable and could cause a 
decline in the market price of our stock and otherwise negatively affect our liquidity and financial condition. 

The investment of our cash balance and our investments in government and corporate debt securities are subject to risks, which may 
cause losses and affect the liquidity of these investments. 

At December 31, 2010, we had $1,811.9 million in cash and cash equivalents and $1,009.7 million in short- and long-term investments. We 
have invested these amounts primarily in U.S. government securities, government-sponsored enterprise obligations, foreign government debt 
securities, corporate notes and bonds, commercial paper, and money market funds meeting certain criteria. Certain of these investments are 
subject to general credit, liquidity, market, and interest rate risks, which may be exacerbated by U.S. sub-prime mortgage defaults that have 
affected various sectors of the financial markets and 

24  

 
 
  
  
  
  
  
  
  
  
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caused credit and liquidity issues at many financial institutions. These market risks associated with our investment portfolio may have a 
negative adverse effect on our liquidity, financial condition, and results of operations. 

Uninsured losses could harm our operating results. 

We self-insure against many business risks and expenses, such as intellectual property litigation and our medical benefit programs, where we 
believe we can adequately self-insure against the anticipated exposure and risk or where insurance is either not deemed cost-effective or is 
not available. We also maintain a program of insurance coverage for various types of property, casualty, and other risks. We place our 
insurance coverage with various carriers in numerous jurisdictions. The types and amounts of insurance that we obtain vary from time to time 
and from location to location, depending on availability, cost, and our decisions with respect to risk retention. The policies are subject to 
deductibles, policy limits, and exclusions that result in our retention of a level of risk on a self-insurance basis. Losses not covered by 
insurance could be substantial and unpredictable and could adversely affect our financial condition and results of operations. 

ITEM 1B.    Unresolved Staff Comments 

None. 

ITEM 2.    Properties 

We lease approximately 2.2 million square feet worldwide, with nearly 66 percent in North America. Our corporate headquarters is located in 
Sunnyvale, California, and consists of buildings totaling approximately 1 million square feet. Each building is subject to an individual lease 
or sublease, which provides various option, expansion, and extension provisions. The leases for our primary corporate headquarters buildings 
expire between January 2013 and November 2022. We also own approximately 80 acres of land adjacent to our leased corporate headquarters 
location. Additionally, we lease an approximately 0.2 million square foot facility in Westford, Massachusetts, under leases that expire in 
March 2018. 

In addition to our offices in Sunnyvale and Westford, we also lease offices in various locations throughout the United States, Canada, South 
America, EMEA, and APAC regions, including offices in Australia, China, Hong Kong, India, Ireland, Israel, Japan, the Netherlands, Russia, 
United Arab Emirates, and the United Kingdom. 

Our leases expire at various times through November 22, 2022. Our current offices are in good condition and appropriately support our 
business needs. 

To support our growth in a cost-effective manner, we have begun a phased office campus build-out on land we own adjacent to our current 
headquarters in Sunnyvale, California. This will result in net facilities-related capital expenditures of approximately $280 million over the 
next 10 quarters, including savings from ongoing costs related to our current facilities. 

For additional information regarding obligations under our operating leases, see Note 15, Commitments and Contingencies, in Notes to 
Consolidated Financial Statements in Item 8 of Part II of this Annual Report on Form 10-K, which is incorporated by reference herein. For 
additional information regarding properties by operating segment, see Note 13, Segment Information, in Notes to Consolidated Financial 
Statements in Item 8 of Part II of this Annual Report on Form 10-K, which is incorporated by reference herein. 

ITEM 3.    Legal Proceedings 

The information set forth under the heading “Legal Proceedings” in Note 15, Commitments and Contingencies, in Notes to Consolidated 
Financial Statements in Item 8 of Part II of this Annual Report on Form 10-K, is incorporated herein by reference. 

ITEM 4.      Removed and Reserved 

25  

 
 
  
  
  
 
  
  
 
  
  
  
  
  
  
 
  
  
 
  
PART II 

ITEM 5.    Market for Registrant's Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities 

Effective October 29, 2009, we transferred our listing from the NASDAQ Global Select Market (“NASDAQ”) to the New York Stock 
Exchange LLC (“NYSE”) and continue to list under the symbol “JNPR.” On December 31, 2010, the last trading day of our fiscal year, the 
closing price of our common stock on the NYSE was $36.92 per share. 

Price Range of Common Stock 

The following table sets forth the high and low bid prices for our common stock of the two most recently completed years as reported on 
NASDAQ for each quarterly period through October 28, 2009, and the high and low sales price for our common stock as reported on the 
NYSE from October 29, 2009 through December 31, 2010: 

NYSE 
First quarter 
Second quarter 
Third quarter 
Fourth quarter 
NASDAQ  
First quarter 
Second quarter 
Third quarter 
Fourth quarter 

Holders 

2010

High 

Low  

$
$
$
$

30.88   
31.98   
31.26   
37.90   

$
$
$
$

24.49   
22.82   
23.00   
30.30   

   $ 

N/A   
N/A   
N/A   
N/A   

N/A     
N/A     
N/A     
N/A     

$ 
$ 
$ 
$ 

2009

High 

Low 

N/A 
N/A 
N/A 
27.90   

18.84   
25.44   
28.05   
28.74   

$

$
$
$
$

N/A 
N/A 
N/A 
24.04 

12.43 
14.75 
22.45 
25.05 

At February 18, 2011, there were approximately 1,100 stockholders of record of our common stock, and we believe a substantially greater 
number of beneficial owners. 

Dividends 

We have never paid cash dividends on our common stock and have no present plans to do so. 

Equity Compensation Plan Information 

The equity compensation plan information called for by Item 201(d) of Regulation S-K is set forth in Item 12 of Part III of this Annual 
Report on Form 10-K under the heading “Executive Compensation Plan Information.” 

Purchases of Equity Securities by the Issuer and Affiliated Purchasers 

The following table provides information with respect to the shares of common stock we repurchased during the three months ended 
December 31, 2010. 

Period  

October 1 - October 31, 2010 
November 1 - November 30, 2010 
December 1 - December 31, 2010 

Total Number of 
Shares Purchased 

Average 
Price Paid 
per Share 

1,495,518   
3,881,185   
—   

$

31.74   
33.32   
—   

Total Number of 
Shares Purchased as 
Part of Publicly 
Announced Plans or 
Programs (1) 

Maximum Dollar Value 
of Shares that May Yet 
Be Purchased Under the 
Plans or Programs (1) 

$

1,495,518      
3,881,185      
—      

884,385,580 
755,072,731 
755,072,731 

 
 
 
  
 
  
  
  
 
   
 
   
   
   
 
   
  
  
 
  
 
  
 
  
 
  
 
 
 
 
  
  
 
 
  
  
  
  
  
  
  
  
 
 
 
   
 
 
   
   
  
  
  
Total 

5,376,703   

$

32.88   

5,376,703      

(1)     

In March 2008, the Company's Board of Directors (the “Board”) approved a stock repurchase program (the “2008 Stock Repurchase
Program”), which authorized the Company to purchase up to $1.0 billion of the Company's common stock. In February 2010, the Board 
approved an additional stock repurchase program (the “2010 Stock Repurchase Program”), which 

26 

 
 
  
  
 
 
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authorized the Company to purchase up to an additional $1.0 billion of the Company's common stock. As of December 31, 2010, the 2008 
Stock  Repurchase  Program  had  no  remaining  authorized  funds  available  for  future  stock  repurchases.  Future  share  repurchases  under  the 
Company's 2010 Stock Repurchase Program will be subject to a review of the circumstances in place at that time and will be made from time 
to time in private transactions or open market purchases as permitted by securities laws and other legal requirements. This program may be 
discontinued at any time. 

Company Stock Performance  

The graph below shows the cumulative total stockholder return over a five-year period assuming the investment of $100 on December 31, 
2005, in each of Juniper Networks' common stock, the Standard & Poor's 500 Stock Index (“S&P 500”), the NYSE Dow Jones Industrial 
Average (“DJI”), and the NASDAQ Telecommunications Index (“IXUT”). The graph shall not be deemed to be incorporated by reference 
into other SEC filings; nor deemed to be soliciting material or filed with the Commission or subject to Regulation 14A or 14C or subject to 
Section 18 of the Exchange Act. The comparisons in the graph below are based upon historical data and are not indicative of, or intended to 
forecast, future performance of our common stock. 

Stock Performance Graph 

JNPR 
S&P 500 
DJI 
IXUT 

As of December 31,  

2005
$  100.00   
100.00   
100.00   
100.00   

$

2006
84.93   
113.62   
116.29   
127.76   

2007
$ 148.88   
117.63   
123.77   
139.48   

$

2008 
78.52     
72.36     
81.89     
79.53     

2009
$  119.60   
89.33   
97.30   
117.89   

2010
$ 165.56 
100.75 
108.02 
122.52 

ITEM 6.    Selected Consolidated Financial Data 

The following selected consolidated financial data should be read in conjunction with Item 7, “Management's Discussion and Analysis of 
Financial Condition and Results of Operations,” and the Consolidated Financial Statements and the notes thereto in Item 8, “Consolidated 
Financial Statements and Supplementary Data,” of this Annual Report on Form 10-K, which are incorporated herein by reference. 

The information presented below reflects the impact of certain significant transactions and the adoption of certain accounting 
pronouncements, which makes a direct comparison difficult between each of the last five fiscal years. For a complete description of matters 
affecting the results in the tables below during the three years ended December 31, 2010, see “Notes to Consolidated Financial Statements” in 
Item 8 of Part II of this Annual Report on Form 10-K. 

 
 
  
  
  
  
  
 
 
   
 
   
 
   
 
   
   
   
 
   
  
  
 
 
 
  
 
  
  
 
  
  
  
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Consolidated Statements of Operations Data 

2010(a) 

2009(b) 

Years Ended December 31,  
2008(c)  
(In millions, except per share data)  

2007(d) 

2006(e) 

$

$

— 

(1.0 )  

100.7 

(104.4 )

(997.8 )

(897.0 )

618.4   

619.4   

(1,001.4 )

360.8   
—   
360.8   

115.2   
1.8   
117.0   

2,303.6 
746.0 
1,557.6 
2,555.3 

3,315.9    $
1,132.7   
2,183.2   
1,872.5   
310.7   
1.4   
312.1   
(196.8 )  

2,836.1    $
910.3   
1,925.8   
1,518.7   
407.1   
103.5   
510.6   
(149.8 )  

4,093.3    $
1,351.5   
2,741.8   
1,974.2   
767.6   
10.6   
778.2   
(158.8 )  

3,572.4      $ 
1,136.9     
2,435.5     
1,740.5     
695.0     
33.9     
728.9     
(217.2 )   
511.7     
—     
511.7     

Net revenues 
Cost of revenues (f) 
Gross margin (f) 
Operating expenses (f) 
Operating income (loss) 
Other income and expense, net 
Income (loss) before income taxes and noncontrolling interest
Provision for income taxes 
Consolidated net income (loss) 
Adjust for net (income) loss attributable to noncontrolling interest
Net income (loss) attributable to Juniper Networks 
Net income (loss) per share attributable to Juniper Networks 
common stockholders: 
Basic 
Diluted 
Shares used in computing net income (loss) per share: 
Basic 
Diluted 
(a)    Includes the following significant pre-tax items: stock-based compensation of $182.0 million, restructuring charges of $10.8 million, acquisition-related 
charges of $6.3 million, and a gain on equity investments of $8.7 million. In addition, includes a non-recurring income tax benefit of $54.1 million we 
received in the first quarter from a change in estimate of unrecognized tax benefits related to share-based compensation. The change resulted from the 
decision in the first quarter of 2010 of the U.S. Court of Appeals for the Ninth Circuit in Xilinx Inc. v. Commissioner. 
(b)    Includes the following significant pre-tax items: stock-based compensation of $139.7 million, litigation settlement charges of $182.3 million, 
write-down of privately-held equity investments of $5.5 million, and restructuring charges of $19.5 million. In addition, includes the following significant tax 
items: $61.8 million related to the write-off of certain net deferred tax assets resulting from a change in California income tax law, $52.1 million related to a 
change in the tax treatment of stock-based compensation expense in transfer pricing arrangements for certain U.S. multinational companies due to a recent 
federal appellate court ruling, and $4.6 million related to an investigation by the India tax authorities. 
(c)    Includes the following significant pre-tax items: stock-based compensation of $108.1 million, write-down of privately-held equity investments of 
$11.3 million, other-than-temporary decline in publicly-traded equity investment of $3.5 million, and litigation settlement charge of $9.0 million. 
(d)    Includes the following significant pre-tax items: stock-based compensation of $88.0 million, stock option tender offer and tax-related charges of 
$8.0 million, stock option investigation costs of $6.0 million, a gain from a privately-held equity investment of $6.7 million, and a net litigation settlement 
gain of $5.3 million. We recognized in accumulated deficit a non-cash charge for the cumulative effect of accounting charge of $19.2 million relating to the 
adoption of Financial Accounting Standards No. 109 Accounting for Income Taxes and Financial Interpretation No., Accounting for Uncertainty in Income 
Taxes-an interpretation of FASB Statement No. 109, which were subsequently codified into Accounting Standard Codification Topic 740 - Income Taxes. 
(e)    Includes the following significant pre-tax items: goodwill and intangible assets impairment charges of $1,283.4 million, stock-based compensation of 
$87.6 million, stock option investigation costs of $20.5 million, other tax-related charges of $10.1 million, and restructuring and acquisition-related charges 
of $5.9 million. 
(f)      Prior period information has been reclassified to conform to the current period's presentation. Refer to Note 1, Basis of Presentation, in Notes to 
Consolidated Financial Statements in Item 8 of Part II of this Annual Report on Form 10-K. 

0.96      $ 
0.93      $ 

530.3     
551.4     

1.18    $
1.15    $

0.67    $
0.62    $

0.22    $
0.22    $

522.4   
538.8   

523.6   
534.0   

537.8   
579.1   

567.5 
567.5 

(1,001.4 )

(1.76 )

(1.76 )

$

Consolidated Balance Sheet Data 

Cash, cash equivalents, and investments 
Working capital 
Goodwill 
Total assets 
Total long-term liabilities 

2010

2009

As of December 31,  
2008 
(In millions)  

2007

2006

$

2,821.6    $
1,742.4   
3,927.8   
8,467.9   
387.1   

2,658.7    $
1,503.2   
3,658.6   
7,590.3   
389.7   

2,293.4      $ 
1,759.6     
3,658.6     
7,187.3     
229.3     

2,015.8    $
1,175.3   
3,658.6   
6,885.4   
151.7   

2,614.3 
1,759.2 
3,624.7 
7,368.4 
490.7 

 
 
 
   
     
     
       
     
  
  
 
 
  
 
  
   
   
      
    
  
   
   
      
    
  
    
  
 
   
     
     
       
     
  
  
 
 
  
 
  
Total Juniper Networks stockholders' equity 

6,608.2   
28  

5,822.1   

5,901.4     

5,353.9   

6,115.1 

 
 
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ITEM 7.    Management's Discussion and Analysis of Financial Condition and Results of Operations 

This Annual Report on Form 10-K (“Report”), including the “Management's Discussion and Analysis of Financial Condition and Results of 
Operations,” contains forward-looking statements regarding future events and the future results of Juniper Networks, Inc. ("we," "us," or the 
“Company”) that are based on our current expectations, estimates, forecasts, and projections about our business, our results of operations, 
the industry in which we operate and the beliefs and assumptions of our management. Words such as “expects,” “anticipates,” “targets,” 
“goals,” “projects,” “would,” “could,” “intends,” “plans,” “believes,” “seeks,” “estimates,” variations of such words, and similar 
expressions are intended to identify such forward-looking statements. These forward-looking statements are only predictions and are subject 
to risks, uncertainties, and assumptions that are difficult to predict. Therefore, actual results may differ materially and adversely from those 
expressed in any forward-looking statements. Factors that might cause or contribute to such differences include, but are not limited to, those 
discussed in this Report under the section entitled “Risk Factors” in Item 1A of Part I and elsewhere, and in other reports we file with the 
SEC, specifically our most recent reports on Form 10-Q. While forward-looking statements are based on reasonable expectations of our 
management at the time that they are made, you should not rely on them. We undertake no obligation to revise or update publicly any 
forward-looking statements for any reason. 

The following discussion is based upon our Consolidated Financial Statements included elsewhere in this Report, which have been prepared 
in accordance with U.S. generally accepted accounting principles (“U.S. GAAP”). In the course of operating our business, we routinely make 
decisions as to the timing of the payment of invoices, the collection of receivables, the manufacturing and shipment of products, the 
fulfillment of orders, the purchase of supplies, and the building of inventory and spare parts, among other matters. Each of these decisions has 
some impact on the financial results for any given period. In making these decisions, we consider various factors including contractual 
obligations, customer satisfaction, competition, internal and external financial targets and expectations, and financial planning objectives. The 
preparation of these financial statements requires us to make estimates and judgments that affect the reported amounts of assets, liabilities, 
revenues, expenses, and related disclosure of contingencies. On an ongoing basis, we evaluate our estimates, including those related to sales 
returns, pricing credits, warranty costs, allowance for doubtful accounts, impairment of long-term assets, especially goodwill and intangible 
assets, contract manufacturer exposures for carrying and obsolete material charges, assumptions used in the valuation of share-based 
compensation, and litigation. We base our estimates on historical experience and on various other assumptions that we believe to be 
reasonable under the circumstances, the results of which form the basis for making judgments about the carrying values of assets and 
liabilities that are not readily apparent from other sources. For further information about our critical accounting policies and estimates, see 
Note 2, Summary of Significant Accounting Policies, in Notes to Consolidated Financial Statements in Item 1 of Part I of this Annual Report 
on Form 10-K, and our “Critical Accounting Policies and Estimates” section included in this “Management's Discussion and Analysis of 
Financial Condition and Results of Operations.” Actual results may differ from these estimates under different assumptions or conditions. 

To aid in understanding our operating results for the periods covered by this Report, we have provided an executive overview and a summary 
of the business and market environment. These sections should be read in conjunction with the more detailed discussion and analysis of our 
consolidated financial condition and results of operations in this Item 7, our “Risk Factors” section included in Item 1A of Part I, and our 
audited consolidated financial statements and notes included in Item 8 of Part II of this report. 

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Executive Overview 

In 2010, we experienced a year-over-year increase in net revenues across all regions and in both the enterprise and service provider 
markets.   These increases reflect growing market demand for networking and security products as our customers expand their networks and 
the recovering global economy.   Additionally, while our net revenues grew, we continued to control costs as we invested in our innovation 
and customer satisfaction initiatives. 

The following table provides an overview of our key financial metrics for the years ended December 31, 2010, and 2009 (in millions, except 
per share amounts and percentages): 

Net revenues 
Operating income 
Percentage of net revenues  
Net income attributable to Juniper Networks 
Percentage of net revenues  
Net income per share attributable to Juniper Networks common 
stockholders: 

Basic 

Diluted 

$
$

$

$

$

2010

  $
  $

  $

4,093.3 
767.6 
18.8 %  
618.4 
15.1 %  

2009 
3,315.9  
310.7  

   $ Change 
   $ 
   $ 

777.4   
456.9   

9.4 %   

117.0  

   $ 

501.4   

3.5 %   

1.18 

  $

0.22  

   $ 

0.96   

1.15 

  $

0.22  

   $ 

0.93   

% Change 

23 %
147 %

429 %

436 %

423 %

•     

Net Revenues:  Our net revenues increased across all three regions, in both the service provider and enterprise markets, in 2010 
compared to 2009. These increases were primarily due to increased demand for our most recent product lines, the MX Series routers, 
EX Series switches, and SRX service gateways, and the improved macroeconomic environment. 

•     

Operating Income:  Our operating income as well as operating margin increased in 2010 compared to 2009. The increase was, in 
large part, due to the increase in sales, a change in customer demand that favored higher margin products, and our continued efforts 
to control expenses and improve efficiencies. Additionally, 2009 was impacted by $182.3 million in litigation settlement charges.

•     

Net Income Attributable to Juniper Networks and Net Income Per Share Attributable to Juniper Networks Common Stock 
Holders:  The increase in net income attributable to Juniper Networks and net income per share attributable to Juniper Networks 
common stockholders in 2010 compared to 2009 is primarily due to the increase in operating income and a non-recurring income tax 
expense and benefit recorded in 2009 and 2010, respectively, from changes in the estimate of unrecognized tax benefits related to 
share-based compensation. These changes were the result of decisions made by the U.S. Court of Appeals for the Ninth Circuit in 
Xilinx Inc. v. Commissioner. 

•     

Stock Repurchase Activity: Under our stock repurchase programs, we repurchased approximately 19.7 million shares of our common 
stock at an average price of $28.67 per share for a total purchase price of $563.5 million in the year ended December 31, 2010.

 
 
  
  
  
 
   
 
     
 
     
   
 
  
 
 
    
  
    
  
  
    
  
    
   
  
 
 
  
 
 
  
 
 
  
 
 
  
 
 
•     

Other Financial Highlights:  Total deferred revenue increased $130.8 million in 2010, primarily due to an increase in deferred 
product revenue from undelivered product commitments and an increase in deferred service revenue, largely due to higher sales of 
service contracts and multi-year service billings.

Business and Market Environment 

We design, develop, and sell products and services that together provide our customers with high-performance network infrastructure that 
creates responsive and trusted environments for accelerating the deployment of services and applications over a single network. We serve the 
high-performance networking requirements of global service providers, enterprises, governments, and research and public sector 
organizations that view the network as critical to their success. High-performance networking is designed to provide fast, reliable, and secure 
access to applications and services at scale. We offer a high-performance network infrastructure that includes IP routing, Ethernet switching, 
security, software, and application acceleration solutions, as well as partnerships designed to extend the value of the network and worldwide 
services and support designed to optimize customer investments. 

30  

 
 
  
  
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In 2010, we experienced increased demand for our products and services due to growing network demand. As more traffic is carried over the 
Internet, computing is centralized in massive data centers and more people in businesses rely on digital devices connected to the network. 
Strategically, we are making progress toward our vision of the New Network by expanding our portfolio of products and solutions through 
organic growth and acquisitions, and aligning those products with mobile internet and cloud computing market trends. 

We continued to deliver new and innovative, high-performance network infrastructure solutions in 2010. We expanded our portfolio of 
offerings for the enterprise market to provide a comprehensive portfolio of routing, switching, and security products that are running on our 
Junos® operating system. We also launched our next generation data center architecture named 3-2-1, that enables customers to connect large 
numbers of data center servers and storage devices in a way that we believe improves the economics and the performance of these massive 
data centers. 

We announced and began shipping the EX4500, a data center switch that can leverage our Virtual Chassis technology to create a data center 
fabric across multiple networking devices and can offer up to 48 10-gigabit Ethernet (“10GbE”) ports. We began shipping the new EX2200 
line of fixed-configuration managed Ethernet switches that offers a plug-and-play solution that addresses access connectivity requirements of 
high performance businesses. We also announced and began shipping the EX8200-40XS line card that enables our modular switch EX8200 
to deliver 40 10GbE ports per line card and the MX80 3D Universal Edge Router, powered by the Junos Trio chipset and designed for both 
service provider and enterprise deployments. We announced our latest fabric chipset that will enable customers to upgrade their existing T 
Series core routers. Additionally, we announced the SRX1400, a consolidated security services gateway for securing small to mid-size 
enterprise, service provider and mobile operator data center environments, and the Dual Stack Light IPv6 migration tool that will allow 
service providers to handle IPv4 address exhaustion. Moreover, we announced the industry's fastest core routing platform, the T4000 Core 
Router powered by Junos, which provides scalability and flexibility to meet bandwidth requirements, while extending investment protection 
of our T Series platform. 

In the area of mobility, we announced and began shipping Junos Pulse, a gateway and downloadable client software for secure connections 
across mobile devices including notebooks, netbooks, smartphones, and tablets as well as non-mobile devices to a broad range of corporate 
applications for a better, simpler experience for users. Additionally, we announced several new and expanded mobility partnerships intended 
to deliver software and solutions for mobile operators and improve experience and economics of their networks. 

In addition to our infrastructure and mobility products, we announced four new applications that will enable IT managers to orchestrate the 
automation and security of networks from a single user-oriented management interface: (i) Juniper Virtual Control, a Junos Space-based 
application to help data center customers manage their Juniper physical switches and VMware virtual switches; (ii) Juniper Ethernet Design, 
a unified Ethernet management application that enables the data center or campus network to dial up or down as needed in response to the 
needs of applications and users; (iii) Juniper Security Design, a software application that allows point-and-click turn-up of both security 
devices and services; and (iv) Juniper Service Insight, a software application for proactive detection, diagnosis, and resolution of network 
performance issues. 

In 2010, we completed the acquisitions of: (i) Ankeena Networks, Inc. (“Ankeena”), a privately-held company, which gives us video delivery 
capabilities that optimize web-based video delivery, provide key components of a content delivery network architecture/solution, improve 
consumers' online video experience, and reduce service provider and carrier service provider infrastructure costs for providing web-based 
video; (ii) SMobile Systems, Inc. (“SMobile”), a privately-held software company, which allows us to extend our security focus through 
integration of SMobile's product portfolio with Junos Pulse; (iii) Altor Networks ("Altor"), a privately-held company, which strengthens our 
ability to deliver an integrated, highly-scalable security architecture that protects physical and virtual systems of enterprise and service 
provider customers; and (iv) Trapeze Networks, a subsidiary of Belden, Inc., which expands our Infrastructure product portfolio to include 
scalable, secure, and highly available wired and wireless infrastructure products. 

Critical Accounting Policies and Estimates 

The preparation of financial statements and related disclosures in conformity with U.S. GAAP requires us to make judgments, assumptions, 
and estimates that affect the amounts reported in the Consolidated Financial Statements and the accompanying notes. We base our estimates 
and assumptions on current facts, historical experience, and various other factors that we believe are reasonable under the circumstances, to 
determine the carrying values of assets and liabilities that are not readily apparent from other sources. Note 2, Summary of Significant 
Accounting Policies, in Notes to Consolidated Financial Statements in Item 8 of Part II of this Annual Report on Form 10-K, describes the 
significant accounting policies and methods used in the 

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preparation of the Consolidated Financial Statements. The critical accounting policies described below are significantly affected by critical 
accounting estimates. Such accounting policies require significant judgments, assumptions, and estimates used in the preparation of the 
Consolidated Financial Statements and actual results could differ materially from the amounts reported based on these policies. To the extent 
there are material differences between our estimates and the actual results, our future consolidated results of operations may be affected. 

•Revenue recognition.  Revenue is recognized when all of the following criteria have been met: 

•     

Persuasive evidence of an arrangement exists.   We generally rely upon sales contracts, or agreements and customer 
purchase orders, to determine the existence of an arrangement.

•     

Delivery has occurred.   We use shipping terms and related documents or written evidence of customer acceptance, when 
applicable, to verify delivery or performance.

•     

Sales price is fixed or determinable.   We assess whether the sales price is fixed or determinable based on the payment terms 
and whether the sales price is subject to refund or adjustment.

•     

Collectability is reasonably assured.   We assess collectability based on the creditworthiness of customer as determined by 
our credit checks and their payment histories. We record accounts receivable net of allowance for doubtful accounts, 
estimated customer returns, and pricing credits.

We adopted Accounting Standards Update (“ASU”) No. 2009-13, Topic 605 - Multiple-Deliverable Revenue Arrangements (“ASU 
2009-13”) and ASU No. 2009-14, Topic 985 - Certain Revenue Arrangements That Include Software Elements (“ASU 2009-14”) on a 
prospective basis as of the beginning of fiscal 2010 for new and materially modified arrangements originating after December 31, 2009. 
Under the new standards, we allocate the total arrangement consideration to each separable element of an arrangement based on the relative 
selling price of each element. Arrangement consideration allocated to undelivered elements is deferred until delivery. 
For fiscal 2010 and future periods, pursuant to the guidance of ASU 2009-13, when a sales arrangement contains multiple elements, and 
software and non-software components that function together to deliver the tangible products' essential functionality, we allocate revenue to 
each element based on a selling price hierarchy. The selling price for a deliverable is based on our vendor-specific objective evidence 
(“VSOE”) if available, third-party evidence (“TPE”) if VSOE is not available, or estimated selling price (“ESP”) if neither VSOE nor TPE is 
available. We then recognize revenue on each deliverable in accordance with our policies for product and service revenue recognition. 
VSOE is based on the price charged when the element is sold separately. In determining VSOE, we require that a substantial majority of the 
selling prices fall within a reasonable range based on historical discounting trends for specific products and services. TPE of selling price is 
established by evaluating largely interchangeable competitor products or services in stand-alone sales to similarly situated customers. 
However, as our products contain a significant element of proprietary technology and our solutions offer substantially different features and 
functionality, the comparable pricing of products with similar functionality typically cannot be obtained. Additionally, as we are unable to 

 
 
  
  
 
 
  
 
 
  
 
 
  
 
 
  
reliably determine what competitors products' selling prices are on a stand-alone basis, we are not typically able to determine TPE. When 
determining the best estimate of selling price, we apply management judgment by considering multiple factors including, but not limited to, 
pricing practices in different geographies and through different sales channels, gross margin objectives, internal costs, competitor pricing 
strategies, and industry technology lifecycles. 
For transactions initiated prior to January 1, 2010, revenue for arrangements with multiple elements, such as sales of products that include 
services, is allocated to each element using the residual method based on the VSOE of fair value of the undelivered items pursuant to ASC 
Topic 985-605 - Software - Revenue Recognition. Under the residual method, the amount of revenue allocated to delivered elements equals 
the total arrangement consideration less the aggregate fair value of any undelivered elements. If VSOE of fair value of one or more 
undelivered items does not exist, revenue from the entire arrangement is deferred and recognized at the earlier of (i) delivery of those 
elements or (ii) when fair value can be established unless maintenance is the only undelivered element, in which case, the entire arrangement 
fee is recognized ratably over the contractual support period. 
As a result of the adoption of ASU 2009-13 and ASU 2009-14, net revenue for the year ended December 31, 2010, was approximately $237 
million higher than the net revenue that would have been recorded under the previous 

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accounting rules. The increase in revenue was due to recognition of revenue for products shipped during the period which included 
approximately $183 million in the year ended December 31, 2010, related to undelivered product commitments for which we were unable to 
demonstrate fair value pursuant to the previous accounting standards. The remainder of the increase in revenue for the year was due to 
products sold into multiple-year service arrangements which was recognized ratably under the previous accounting standards and for the 
change in our allocation methodology from the residual method to the relative selling price method as prescribed by ASU 2009-13. 
We cannot reasonably estimate the effect of adopting these standards on future financial periods as the impact will vary depending on the 
nature and volume of new or materially modified arrangements in any given period as well as on changes in our business practices. However, 
as ASU 2009-13 and ASU 2009-14 would allow us to recognize revenue for the portion allocated to delivered items in multiple element 
arrangements and defer revenue for only the portion allocated to the undelivered items, we expect that the magnitude of deferrals related to 
undelivered product commitments and other items, for which we previously would not have been able to establish VSOE, will gradually 
decrease over time. 
We account for multiple agreements with a single customer as one arrangement if the contractual terms and/or substance of those agreements 
indicate that they may be so closely related that they are, in effect, parts of a single arrangement. Our ability to recognize revenue in the 
future may be affected if actual selling prices are significantly less than fair value. In addition, our ability to recognize revenue in the future 
could be impacted by conditions imposed by our customers. 

For sales to direct end-users, value-added resellers, and original equipment manufacturers ("OEM") partners, we recognize product revenue 
upon transfer of title and risk of loss, which is generally upon shipment. It is our practice to identify an end-user prior to shipment to a 
value-added reseller. For our end-users and value-added resellers, there are no significant obligations for future performance such as rights of 
return or pricing credits. Our agreements with OEM partners may allow future rights of returns. Additionally, a portion of our sales are made 
through distributors under agreements allowing for pricing credits or rights of return. We recognize product revenue on sales made through 
these distributors upon sell-through as reported to us by the distributors. Deferred revenue on shipments to distributors reflects the effects of 
distributor pricing credits and the amount of gross margin expected to be realized upon sell-through. Deferred revenue is recorded net of the 
related product costs of revenue. 

We record reductions to revenue for estimated product returns and pricing adjustments, such as rebates and price protection, in the same 
period that the related revenue is recorded. Management's judgment with respect to the amount of these reductions is based on historical sales 
returns and price protection credits, specific criteria included in rebate agreements, and other factors known at the time. Should actual product 
returns or pricing adjustments differ from our estimates, additional reductions to revenue may be required. In addition, we report revenue net 
of sales taxes. 

Service revenues include revenue from maintenance, training, and professional services. Maintenance is offered under renewable contracts. 
Revenue from maintenance service contracts is deferred and recognized ratably over the contractual support period, which is generally one to 
three years. Revenue from training and professional services is recognized as the services are completed or ratably over the contractual 
period, which is generally one year or less. 

We sell certain accounts receivable on a non-recourse basis as part of a customer financing arrangement primarily with one major financing 
company. We record cash received under this arrangement in advance of revenue recognition as short-term debt. 

•     

Contract Manufacturer Liabilities.  We outsource most of our manufacturing, repair, and supply chain management operations to 
our independent contract manufacturers, and a significant portion of our cost of revenues consists of payments to them. Our 
independent contract manufacturers manufacture our products primarily in China, Malaysia, Mexico, and the United States. We 
have employees in our manufacturing and operations organization who manage relationships with our independent contract 
manufacturers, manage our supply chain, and monitor product testing and quality. We generally do not own the components and title 
to products transfers from our independent contract manufacturers to us and immediately to our customers upon shipment. Our 
independent contract manufacturers produce our products using design specifications, quality assurance programs, and standards 
that we establish, and they procure components and manufacture our products based on our demand forecasts. These forecasts are 
our estimates of future demand for our products, based upon historical trends and analysis from our sales and marketing 
organizations, adjusted for overall market conditions. We establish a provision for inventory, carrying costs, and obsolete material 
exposures for excess components purchased based on historical trends. If the actual component 

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usage and product demand are significantly lower than forecast, which may be caused by factors outside of our control, we may incur charges 
for excess components, which could have an adverse impact on our gross margins and profitability. Supply chain management remains an 
area of focus as we balance the risk of material obsolescence and supply chain flexibility in order to reduce lead times. 

•     

•     

Warranty Costs.  We generally offer a one-year warranty on all of our hardware products and a 90-day warranty on the media that 
contains the software embedded in the products. We accrue for warranty costs as part of our cost of sales based on associated 
material costs, labor costs for customer support, and overhead at the time revenue is recognized. Material cost is estimated primarily 
based upon the historical costs to repair or replace product returns within the warranty period. Technical support labor and 
overhead cost are estimated primarily based upon historical trends in the cost to support the customer cases within the warranty 
period. Although we engage in extensive product quality programs and processes, if actual product failure rates, use of materials, or 
service delivery costs differ from estimates, additional warranty costs may be incurred, which could reduce gross margin.

Goodwill and Purchased Intangible Assets.  We make significant estimates and assumptions when evaluating impairment of goodwill 
and other intangible assets on an ongoing basis, as well as when valuing goodwill and other intangible assets in connection with the 
initial purchase price allocation of an acquired entity. The amounts and useful lives assigned to identified intangible assets impacts 
the amount and timing of future amortization expense. The value of our intangible assets, including goodwill, could be impacted by 
future adverse changes such as: (i) future declines in our operating results, (ii) a sustained decline in our market capitalization, 
(iii) significant slowdown in the worldwide economy or the networking industry, or (iv) failure to meet our forecasted operating 
results. The process of evaluating the potential impairment of goodwill and intangible assets is subjective and requires significant 
judgment at many points during analysis. 

We evaluate goodwill on an annual basis as of November 1st or more frequently if we believe impairment indicators exist. Goodwill is tested 
for impairment at the reporting unit level by comparing the reporting unit's carrying value, including goodwill, to the fair value of the 
reporting unit. The fair values of the reporting units are estimated using a combination of the income and the market approaches. Under the 
income approach, we calculate fair value of a reporting unit based on the present value of estimated future cash flows. Under the market 
approach, we estimate fair value of our reporting units based on market multiples of revenue or earnings for comparable companies. If the fair 
value of the reporting unit exceeds the carrying value of the net assets assigned to that unit, goodwill is not impaired and we are not required 
to perform further testing. If the fair value of the reporting unit does not exceed the carrying value of the net assets assigned to the reporting 
unit, then we must perform the second step of the impairment test in order to determine the implied fair value of the reporting unit's goodwill. 
When the carrying value of a reporting unit's goodwill exceeds its implied fair value, we record an impairment loss equal to the difference. 

Intangible assets are evaluated for impairment whenever events or changes in circumstances indicate that the carrying amount of the assets 
may not be recoverable. An asset is considered impaired if its carrying amount exceeds the future net cash flow the asset is expected to 
generate and the impairment loss recognized is the amount by which the carrying amount of the asset exceeds its fair value. We assess the 
recoverability of our intangible assets by determining whether the unamortized balances are greater than the sum of undiscounted future net 
cash flows of the related assets. The amount of impairment, if any, is measured based on projected discounted future net cash flows. 

The estimates used are consistent with the plans and estimates that we use to manage our business. If our actual results or the plans and 
estimates used in future impairment analyses are lower than the original estimates used to assess the recoverability of these assets, we could 
incur additional impairment charges. 

•     

Share-Based Compensation.  We recognize share-based compensation expense for all share-based payment awards including 
employee stock options, restricted stock units (“RSUs”), performance share awards ("PSAs"), and purchases under our Employee 
Stock Purchase Plan ("ESPP") in accordance with ASC Topic 718 - Compensation - Stock Compensation ("ASC Topic 718"). 
Share-based compensation expense for expected-to-vest share-based awards is valued under the single-option approach and 
amortized on a straight-line basis, net of estimated forfeitures.

We utilize the Black-Scholes-Merton (“BSM”) option-pricing model in order to determine the fair value of stock options. The BSM model 
requires various highly subjective assumptions including volatility, expected option life, and risk-free interest rate. The expected volatility is 
based on the implied volatility of market traded options on our common stock, adjusted for other relevant factors including historical 

 
 
  
 
 
  
 
 
  
  
  
  
 
 
  
volatility of our common stock over the most recent period commensurate with the estimated expected life of our stock options. The expected 
life of an award is 

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based on historical experience, the terms and conditions of the stock awards granted to employees, and the potential effect from options that 
have not been exercised. We determine the fair value of RSUs and PSAs based on the closing market price of our common stock on the grant 
date. In addition, we estimate share-based compensation expense for our PSAs based on the vesting criteria and only recognize expense for 
the portions in which annual targets have been set. 

The assumptions used in calculating the fair value of share-based payment awards represent management's best estimates. These estimates 
involve inherent uncertainties and the application of management's judgment. If factors change and different assumptions are used, our 
share-based compensation expense could be materially different in the future. In addition, we are required to estimate the expected forfeiture 
rate and recognize expense only for those expected-to-vest shares. If our actual forfeiture rate is materially different from our estimate, our 
recorded share-based compensation expense could be different. 

•     

Income Taxes.  Estimates and judgments occur in the calculation of certain tax liabilities and in the determination of the 
recoverability of certain deferred tax assets, which arise from temporary differences and carryforwards. Deferred tax assets and 
liabilities are measured using the currently enacted tax rates that apply to taxable income in effect for the years in which those tax 
assets are expected to be realized or settled. We regularly assess the likelihood that our deferred tax assets will be realized from 
recoverable income taxes or recovered from future taxable income based on the realization criteria set forth in ASC Topic 740 - 
Income Taxes (“ASC Topic 740”). To the extent that we believe any amounts are not more likely than not to be realized, we record a 
valuation allowance to reduce our deferred tax assets. We believe it is more likely than not that future income from the reversal of the 
deferred tax liabilities and forecasted income will be sufficient to fully recover the remaining deferred tax assets. In the event we 
determine that all or part of the net deferred tax assets are not realizable in the future, an adjustment to the valuation allowance is 
charged to earnings in the period such determination is made. Similarly, if we subsequently realize deferred tax assets that were 
previously determined to be unrealizable, the respective valuation allowance is reversed, resulting in an adjustment to earnings in 
the period such determination is made. In addition, the calculation of our tax liabilities involves dealing with uncertainties in the 
application of complex tax regulations. We recognize and measure potential liabilities based upon our estimate of whether, and the 
extent to which, additional taxes will be due. 

Significant judgment is required in determining any valuation allowance recorded against deferred tax assets. In assessing the need for a 
valuation allowance, we consider all available evidence, including past operating results, estimates of future taxable income, and the 
feasibility of tax planning strategies. In the event that we change our determination as to the amount of deferred tax assets that can be 
realized, we will adjust our valuation allowance with a corresponding effect to the provision for income taxes in the period in which such 
determination is made. 

Significant judgment is also required in evaluating our uncertain tax positions under ASC Topic 740 and determining our provision for 
income taxes. Although we believe our reserves under ASC Topic 740 are reasonable, no assurance can be given that the final tax outcome of 
these matters will not be different from that which is reflected in our historical income tax provisions and accruals. We adjust these reserves 
in light of changing facts and circumstances, such as the closing of a tax audit or the refinement of an estimate. To the extent that the final tax 
outcome of these matters is different from the amounts recorded, such differences will affect the provision for income taxes in the period in 
which such determination is made, as it was during the first quarter of 2010 when we recorded a non-recurring income tax benefit as a result 
of a taxpayer favorable federal appellate court ruling in Xilinx, Inc. v. Commissioner. The provision for income taxes includes the effect of 
reserves under ASC Topic 740 and any changes to the reserves that are considered appropriate, as well as the related net interest and 
penalties, if applicable. 

•     

Loss Contingencies.  We are subject to the possibility of various loss contingencies arising in the ordinary course of business. We 
consider the likelihood of loss or impairment of an asset, or the incurrence of a liability, as well as our ability to reasonably estimate 
the amount of loss, in determining loss contingencies. An estimated loss contingency is accrued when it is probable that an asset has 
been impaired or a liability has been incurred and the amount of loss can be reasonably estimated. We record a charge equal to the 
minimum estimated liability for litigation costs or a loss contingency only when both of the following conditions are met: 
(i) information available prior to issuance of our consolidated financial statements indicates that it is probable that an asset had 
been impaired or a liability had been incurred at the date of the financial statements and (ii) the range of loss can be reasonably 
estimated. We regularly evaluate current information available to us to determine whether such accruals should be adjusted and 
whether new accruals are required. 

From time to time, we are involved in disputes, litigation, and other legal actions. We are aggressively defending our 

 
 
  
  
 
 
  
  
  
 
 
  
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current litigation matters. However, there are many uncertainties associated with any litigation, and these actions or other third-party claims 
against us may cause us to incur costly litigation and/or substantial settlement charges. In addition, the resolution of any future intellectual 
property litigation may require us to make royalty payments, which could adversely affect gross margins in future periods. If any of those 
events were to occur, our business, financial condition, results of operations, and cash flows could be adversely affected. The actual liability 
in any such matters may be materially different from our estimates, which could result in the need to adjust our liability and record additional 
expenses. For a discussion of current litigation, please see under the heading "Legal Proceedings" in Note 15, Commitments and 
Contingencies, in Notes to Consolidated Financial Statements in Item 8 of Part II of this Annual Report on Form 10-K. 

Recent Accounting Pronouncements 

See Note 2, Summary of Significant Accounting Policies, in Notes to the Consolidated Financial Statements in Item 8 of Part II of this 
Annual Report on Form 10-K, for a full description of recent accounting pronouncements, including the expected dates of adoption and 
estimated effects on financial condition and results of operations, which is incorporated herein by reference. 

Results of Operations 

The following table presents product and service net revenues (in millions, except percentages): 

Net revenues: 

Product 

Percentage of net 
revenues  
Service 
Percentage of net 
revenues  

2010 

Years Ended December 31,
   $ Change

2009 

% Change

2009

Years Ended December 31,
2008 

$ Change

% Change

$ 

3,258.7  

  $ 

2,568.0  

  $  690.7 

27 %   $

2,568.0  

  $

2,911.0   

  $ 

(343.0 )  

(12

)
%

79.6 %    

77.4 %    

77.4 %  

81.5 %    

834.6  

747.9  

86.7 

12 %  

747.9 

661.4  

86.5 

13  %

20.4 %    

22.6 %    

22.6 %  

18.5 %    

Total net revenues 

$ 

4,093.3  

  $ 

3,315.9  

  $  777.4 

23 %   $

3,315.9  

  $

3,572.4   

  $ 

(256.5 )  

(7

)
%

Our net product revenues increased in 2010 compared to 2009 primarily due to an increase in Infrastructure product sales to service provider 
and enterprise customers across all regions, Service Layer Technologies ("SLT") product sales to enterprise customers across all regions and 
SLT product sales to service provider customers in the Americas. The increased revenue was the result of increased demand for our most 
recent product lines, the MX Series routers, EX Series switches, and SRX service gateways, as well as the improved macroeconomic 
environment as compared to 2009. Additionally our net service revenues increased in 2010 compared to 2009 due to an increase in sales to 
enterprise customers across all regions and to service provider customers in the EMEA and Asia Pacific ("APAC") regions, which was 
primarily driven by growth in the installed base and continued strength in contract renewals for support services. The year-over-year change 
also reflects an impact of approximately $237 million related to the the adoption of the new revenue recognition accounting guidance 
described in the Critical Accounting Policies section above. 

Our net product revenues decreased in 2009 compared to 2008 primarily due to decreased revenue from our routing products to service 
provider customers whose spending patterns were affected by the weakened global economy, partially offset by increased revenues from our 
EX Series switching products. Our net service revenues increased in 2009 compared to 2008 primarily due to the increase in professional 
services and maintenance revenue from our expanding installed base of equipment under service contracts. 

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Table of Contents 
Infrastructure Segment Revenues 

Our Infrastructure segment consists primarily of products and services related to the E, M, MX, and T Series router product families, EX 
Series switching products, as well as circuit-to-packet products. Additionally, the Infrastructure segment offers a complete wireless local area 
network ("WLAN") solution that provides high reliability, performance, security, and management for mobile applications. The following 
table presents net Infrastructure segment revenues and net Infrastructure segment revenues as a percentage of total net revenues by product 
and service categories (in millions, except percentages): 

Years Ended December 31,

2010 

2009 

$ Change

  % Change

2009

Years Ended December 31,

2008 

$ Change

  % Change

Net Infrastructure segment 
revenues: 

Infrastructure product revenues $ 

2,511.6      $ 

1,959.2      $

552.4   

28 %   $

1,959.2     $

2,301.9      $ 

(342.7 )  

(15

)
%

Percentage of net revenues  

61.3 %   

59.1 %  

59.1 %  

64.4 %   

Infrastructure service revenues 

538.7     

482.4     

56.3   

12 %  

482.4 

424.0     

58.4   

14  %

Percentage of net revenues  

13.2 %   

14.5 %  

14.5 %  

11.9 %   

Total Infrastructure segment 
revenues 

$ 

3,050.3      $ 

2,441.6      $

608.7   

25 %   $

2,441.6     $

2,725.9      $ 

(284.3 )  

(10

)
%

Percentage of net revenues  

74.5 %   

73.6 %  

73.6 %  

76.3 %   

Infrastructure - Product 

In 2010, Infrastructure products revenue experienced growth in the enterprise and service provider markets across all regions compared to 
2009. This increase was primarily attributable to revenue growth from our MX Series routers and EX Series switches. The increased demand 
for our products was primarily due to growing network demand attributable to increased reliance on digital devices connected to the network, 
and to a lesser extent, the improved macroeconomic environment. 

Infrastructure product revenues decreased in 2009 compared to 2008, primarily due to decreased revenue from M, T, and E Series product 
families attributable to our customers' reduced demand as a result of the global economic environment, partially offset by revenue growth 
from our EX Series switching products and MX Series products. We experienced a decrease in product revenue from the service provider 
market in 2009 compared to 2008, primarily due to decreased capital spending in that market. We experienced an increase in product revenue 
from the enterprise market in 2009 compared to 2008, primarily due to the growth in our EX Series switching business and our continued 
focus on selling Infrastructure products into the enterprise market, which resulted in growth of enterprise revenues in Americas and APAC. 
Geographically, Infrastructure product revenue decreased in all three regions in 2009. 

We track Infrastructure chassis revenue units and ports shipped to analyze customer trends and indicate areas of potential network growth. 
Most of our Infrastructure product platforms are modular, with the chassis serving as the base of the platform. Each modular chassis has a 
certain number of slots that are available to be populated with components we refer to as modules or interfaces. The modules are the 
components through which the platform receives incoming packets of data from a variety of transmission media. The physical connection 
between a transmission medium and a module is referred to as a port. The number of ports on a module varies widely depending on the 
functionality and throughput offered by the module. Chassis revenue units represent the number of chassis on which revenue was recognized 
during the period. The following table presents Infrastructure revenue units and ports shipped: 

2010 

Years Ended December 31,
2009 

  Unit Change

  % Change

2009

Years Ended December 31,
   Unit Change
2008 

  % Change

 
 
  
  
 
   
 
     
 
     
   
 
     
 
     
 
     
   
 
  
 
  
  
 
 
 
  
      
      
    
     
     
      
    
   
    
  
 
    
  
 
    
  
 
    
  
    
  
 
    
  
  
  
  
  
  
 
 
     
     
   
 
   
   
     
   
 
  
 
  
  
 
 
Infrastructure chassis revenue 
units(1) 
Infrastructure ports 
shipped(1) 

14,115     

12,578    

1,537   

12 %  

12,578   

13,745     

(1,167 )  

563,275     

437,278    

125,997   

29 %  

437,278   

397,907     

39,371   

(8

)
%

10  %

(1)     Excludes modular and fixed configuration EX Series switching products and circuit to packet products.

Infrastructure chassis revenue units increased in 2010 compared to 2009, which was commensurate with Infrastructure product revenue 
growth during the year. Infrastructure port shipments increased in 2010 compared to 2009, primarily due to the continued growth in sales of 
MX Series products, which generally contain a higher number of ports per chassis. 

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Infrastructure chassis revenue units decreased in 2009 compared to 2008, primarily due to reduced customer demand because of the 
weakened global economy. The port shipments increased in 2009 compared to 2008, primarily due to an increase in the MX Series products, 
which generally contain a higher number of ports per chassis. 

Infrastructure - Service 

A majority of our service revenue is earned from customers that purchase our products and enter into support services contracts for support. 
Infrastructure service revenues increased in 2010 compared to 2009, which was primarily driven by increased revenue from new product 
sales and strong contract renewals for support services. From a geographical and market perspective, the increase in Infrastructure service 
revenues was primarily due to an increase in enterprise business across all regions and service provider business in the EMEA and APAC 
regions. These increases were partially offset by a decrease in service revenue in the Americas service provider market. 

Infrastructure service revenues increased in 2009 compared to 2008, primarily due to an increase in our installed base of equipment being 
serviced and support services renewals. From a geographical and market perspective, the increase in Infrastructure service revenues was 
primarily due to an increase in the enterprise and service provider business across all regions during the year ended December 31, 2009. 

SLT Segment Revenues 

Our SLT segment consists primarily of products and services related to our SRX Series services gateways, Firewall/VPN (“Firewall”) 
systems and appliances, SSL VPN appliances, the J Series router product family, IDP appliances, and WAN optimization platforms. The 
following table presents net SLT segment revenues and net SLT segment revenues as a percentage of total net revenues by product and 
service categories (in millions, except percentages): 

2010 

Years Ended December 31,
2009 

$ Change

  % Change

2009

Years Ended December 31,
   $ Change

2008 

% Change

Net SLT segment 
revenues: 

SLT product revenues 

$ 

747.1  

   $ 

608.8  

$

138.3   

23 %   $

608.8 

  $ 

609.1  

   $

(0.3 )  

N/M 

Percentage of net 
revenues  

18.3 %   

18.4 %   

18.4 %  

17.1 %   

SLT service revenues 

295.9  

265.5  

30.4   

11 %  

265.5 

237.4  

28.1   

12 %

Percentage of net 
revenues  

Total SLT segment 
revenues 

Percentage of net 
revenues  

SLT - Product 

7.2 %   

8.0 %   

8.0 %  

6.6 %   

$  1,043.0  

   $ 

874.3  

   $

168.7   

19 %   $

874.3  

  $ 

846.5  

   $

27.8   

3 %

25.5 %   

26.4 %   

26.4 %  

23.7 %   

We experienced an increase in SLT product revenue in the year ended December 31, 2010, compared to the same period in 2009, primarily 
due to increased demand for our branch and high-end SRX service gateway products. From a geographical and market perspective, we 
experienced revenue growth in the Americas service provider market and across all regions in the enterprise market in 2010. 

SLT product revenues was relatively flat in 2009 compared to 2008, primarily due to an increase in revenue from our SRX services gateways 
offset by a decrease in revenue from our high-end and branch firewall products. In 2009, we experienced an increase in revenue from the 
service provider market and a decrease in revenue from the enterprise market compared to 2008. Geographically, SLT product revenue 
decreased in the EMEA and APAC regions and increased in the Americas region. 

 
 
  
  
  
  
  
  
 
   
 
     
 
 
   
   
 
     
 
     
 
     
   
 
  
 
  
  
 
 
 
 
   
  
   
  
    
   
 
   
 
   
  
   
   
 
    
   
 
   
   
  
 
 
  
    
   
 
   
   
    
   
 
   
   
  
  
  
The following table presents SLT revenue units recognized: 

2010 

Years Ended December 31,
   Unit Change
2009 

% Change

2009

Years Ended December 31,
   Unit Change
2008 

  % Change

SLT revenue units 

231,365     

208,907     

22,458    

11 %  

208,907   

241,504     

(32,597 )  

(13

)
%

SLT revenue units increased in 2010 compared to 2009, which was commensurate with growth in SLT product revenue. The percentage 
increase in SLT revenue units was less than the increase in SLT product revenues due to a product mix that favored 

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higher average selling prices. SLT revenue units decreased in 2009 compared to 2008. The percentage decrease in SLT revenue units was 
greater than the percentage decrease in SLT product revenue, primarily due to product mix that favored products with higher average selling 
prices. 

SLT - Service 

The increase in SLT service revenue in 2010 compared to 2009, was primarily driven by increased revenue from new product sales and 
strong contract renewals for support services. From a geographical and market perspective, the increase in SLT service revenues was due to 
growth in the enterprise and service provider markets across all regions. 

SLT service revenues increased in 2009 compared to 2008, primarily due to an increase in our installed base of equipment being serviced and 
contract renewals for support services. In 2009, we experienced an increase in service revenue from the service provider and enterprise 
markets compared to 2008. Geographically, SLT service revenue increased in all regions in 2009. 

Total Net Revenues by Geographic Region 

The following table presents the total net revenues by geographic region (in millions, except percentages): 

Years Ended December 31,

2010 

2009 

$ Change

  % Change

2009

Years Ended December 31,

2008 

$ Change

  % Change

Americas: 

United States 

$ 

1,890.1  

   $ 

1,515.1  

   $ 

375.0   

25 %   $

1,515.1  

  $

1,537.5   

   $ 

(22.4 )  

Other 

205.5  

172.8  

32.7   

19 %  

172.8  

228.7  

(55.9 )  

Total Americas 

2,095.6  

1,687.9  

407.7   

24 %  

1,687.9  

1,766.2  

(78.3 )  

Percentage of net 
revenues  

EMEA 

Percentage of net 
revenues 

APAC 

Percentage of net 
revenues  

51.2 %   

50.9 %   

50.9 %  

49.4 %   

1,189.3  

953.2  

236.1   

25 %  

953.2  

1,077.7  

(124.5 )  

29.1 %   

28.7 %   

28.7 %  

30.2 %   

808.4  

674.8  

133.6   

20 %  

674.8  

728.5  

(53.7 )  

19.7 %   

20.4 %   

20.4 %  

20.4 %   

Total 

$ 

4,093.3  

   $ 

3,315.9  

   $ 

777.4   

23 %   $

3,315.9  

  $

3,572.4   

   $ 

(256.5 )  

(1

(24

)
%

)
%

(4

)
%

(12

)
%

(7

)
%

(7

)
%

Net revenues in the Americas region increased in absolute dollars and as a percentage of total net revenues in 2010 compared to 2009, 
primarily due to increased demand in the United States. In the United States, net revenues increased in absolute dollars and increased as a 
percentage of total net revenues, in 2010 compared to 2009, due to the relative strength of the enterprise and service provider markets in the 
United States. Net revenues in the Americas region decreased in absolute dollars, but increased as a percentage of total net revenues in 2009 
compared to 2008, primarily due to a revenue decrease from the service provider market, partially offset by an increase in net revenues from 
the enterprise market. In particular, the United States, Mexico, and Brazil accounted for more than half of the decline in net revenue in the 
Americas region. In the United States, net revenues decreased in absolute dollars and increased as a percentage of total net revenues, in 2009 
compared to 2008, primarily due to the relative strength of sales in the United States compared to EMEA and APAC. 

Net revenues in EMEA increased in absolute dollars and as a percentage of total net revenues in 2010 compared to 2009, primarily due to 
increased demand in the Russian Federation, Germany, and the United Kingdom. This increase was largely driven by product sales to both 
the enterprise and service provider markets. Net revenues in EMEA decreased in absolute dollars and as a percentage of total net revenues in 
2009 compared to 2008, primarily due to reduced demand in the service provider market, partially offset by a slight increase in revenue from 

 
 
  
  
  
  
  
  
 
   
 
     
 
     
   
 
     
 
     
 
     
   
 
  
 
  
  
  
 
 
  
   
  
   
  
    
  
 
  
 
   
  
   
  
  
  
 
  
  
  
 
  
    
   
 
   
  
  
  
 
  
    
   
 
   
  
  
  
 
  
    
   
 
   
  
  
  
the enterprise market. In particular Sweden, Germany, Belgium, and United Kingdom attributed more than half of the decline in net revenues 
in EMEA. 

Net revenues in APAC increased in absolute dollars in 2010 compared to 2009, primarily due to increased demand in Japan, China, and 
Australia. This increase was primarily driven by product sales to enterprise customers and service sales to service provider customers. Net 
revenues in APAC decreased in absolute dollars in 2009 compared to 2008, primarily due to reduced demand in the service provider, partially 
offset by a slight increase in revenue from the enterprise market. In particular, over half of the decline in APAC net revenues was attributable 
to Japan. Net revenues in APAC as a percentage of total net revenues decreased slightly, primarily due to the relative strength of the 
enterprise market in the United States. 

39  

 
 
  
Table of Contents 

 Net Revenues by Markets and Customers 

The following table presents the total net revenues by markets (in millions, except percentages): 

Years Ended December 31,

2010 

2009 

$ Change

% Change

2009

Years Ended December 31,

2008 

$ Change

  % Change

Service Provider  $ 

2,631.5  

   $ 

2,197.1  

   $ 

434.4   

20 %   $

2,197.1  

  $

2,568.2   

   $ 

(371.1 )  

(14

)
%

Percentage of net 
revenues  
Enterprise 
Percentage of net 
revenues  

64.3 %   

66.3 %   

66.3 %  

71.9 %   

1,461.8  

1,118.8  

343.0   

31 %  

1,118.8 

1,004.2  

114.6   

11  %

35.7 %   

33.7 %   

33.7 %  

28.1 %   

Total 

$ 

4,093.3  

   $ 

3,315.9  

   $ 

777.4   

23 %   $

3,315.9  

  $

3,572.4   

   $ 

(256.5 )  

(7

)
%

We sell our high-performance network products and service offerings from our Infrastructure and SLT segments to two primary markets - 
service provider and enterprise. The service provider market includes wireline, wireless, and cable operators, as well as major internet content 
and application providers. The enterprise market represents businesses; federal, state, and local governments; and research and education 
institutions. 

Net revenues from sales to the service provider market increased in absolute dollars in 2010 compared 2009, primarily due to our customers’ 
increased investment in new network build-outs and purchases of additional networking capacity to support network growth. Net revenues 
from the service provider market decreased in absolute dollars and as a percentage of total net revenues in 2009 compared to 2008, primarily 
due to our customers' delayed investment in new network build-outs and purchases of additional networking capacity in reaction to the weak 
global macroeconomic environment. The decline in service provider revenue as a percentage of net revenues was also attributable to the 
relative strength of our revenue from the enterprise market. 

Net revenues from sales to the enterprise market increased in absolute dollars and as a percentage of total net revenues in 2010 compared to 
2009, primarily due to our expanded portfolio of products and our continued investments to expand our footprint in the enterprise market. Net 
revenues from the enterprise market increased in absolute dollars and as a percentage of total net revenues in 2009 compared to 2008, 
primarily due to revenue growth from our EX Series switching products.  

Verizon Communications, Inc., accounted for 10.6% of our net revenues for the year ended December 31, 2010. AT&T, Inc., accounted for 
10.4% of our net revenues for the year ended December 31, 2009. No single customer accounted for 10% or more of our net revenues for the 
year ended December 31, 2008. 

40  

 
 
  
  
  
 
   
 
     
 
     
   
 
     
 
     
 
     
   
 
  
 
  
  
  
 
 
 
  
    
   
 
   
  
  
  
 
  
    
   
 
   
  
  
  
  
   
  
Table of Contents 
Cost of Revenues and Gross Margin 

The following table presents cost of product and service revenues and the related gross margins (in millions, except percentages): 

Years Ended December 31,

2010 

2009 

$ Change

  % Change

2009

Years Ended December 31,
2008 

$ Change

% Change

Cost of revenues: 

Product 

$ 

1,000.9  

   $ 

841.7  

   $ 

159.2   

19 %   $

841.7  

  $

867.6  

   $ 

(25.9 )  

(3

)
%

Percentage of net 
revenues  

24.4 %   

25.4 %   

25.4 %  

24.3 %   

Service (1) 

350.6  

291.0  

59.6   

20 %  

291.0 

269.3  

21.7   

8  %

Percentage of net 
revenues  

8.6 %   

8.8 %   

8.8 %  

7.5 %   

Total cost of 
revenues (1) 

Percentage of net 
revenues  
Gross margin: 

Product gross 
margin 

Percentage of 
product revenues  

Service gross 
margin (1) 

Percentage of 
service revenues  

Total gross margin 
(1) 

1,351.5  

1,132.7  

218.8   

19 %  

1,132.7  

1,136.9  

(4.2 )  

N/M  

33.0 %   

34.2 %   

34.2 %  

31.8 %   

2,257.8  

1,726.3  

531.5   

31 %  

1,726.3  

2,043.4  

(317.1 )  

(16

)
%

69.3 %   

67.2 %   

67.2 %  

70.2 %   

484.0  

456.9  

27.1   

6 %  

456.9  

392.1  

64.8   

17  %

58.0 %   

61.1 %   

61.1 %  

59.3 %   

$ 

2,741.8  

   $ 

2,183.2  

   $ 

558.6   

26 %   $

2,183.2  

  $

2,435.5  

   $ 

(252.3 )  

(10

)
%

Percentage of net 
revenues  
 ________________________________ 

67.0 %   

65.8 %   

65.8 %  

68.2 %   

(1)     Prior period information has been reclassified to conform to the current period's presentation. Refer to Note 1, Basis of Presentation, in Notes to Consolidated Financial 

Statements in Item 8 of Part II of this Annual Report on Form 10-K.

Most of our manufacturing, repair, and supply chain operations are outsourced to independent contract manufacturers. Accordingly, most of 
our cost of revenues consists of payments to our independent contract manufacturers for standard product costs. The cost of product revenues 
increased in absolute dollars in 2010 compared to 2009, primarily due to an increase in product volume. Product gross margin and product 

 
 
  
  
 
   
 
     
 
     
   
 
     
 
     
 
     
   
 
  
 
  
  
  
 
 
  
 
   
  
   
  
    
  
 
  
 
   
  
   
  
    
   
 
   
   
  
  
 
  
    
   
 
   
   
  
  
 
  
    
   
 
   
   
   
  
   
  
    
  
 
  
 
   
  
   
  
  
  
 
  
    
   
 
   
   
  
  
 
  
    
   
 
   
   
    
   
 
   
   
 
 
  
gross margin as a percentage of product revenues in 2010 compared to 2009 increased primarily due to a change in product mix that favored 
higher margin products and our continued efforts to manage costs. As of December 31, 2010, and 2009, we had 273 and 244 employees, 
respectively, in our manufacturing and operations organization that primarily manage relationships with our independent contract 
manufacturers, manage our supply chain, orchestrate new product introductions, and monitor and manage product testing and quality. 

The cost of product revenues and product gross margin decreased in absolute dollars in 2009 compared to 2008 primarily due to lower 
revenue level. The decrease in product gross margin as a percentage of revenues in 2009 compared to 2008, is primarily attributable to 
product mix that favored products with lower gross margin, such as our switching and MX Series products, geographical mix, and pricing. 

The cost of service revenues increased in 2010 compared to 2009, primarily due to increased headcount and outside services to support our 
customer needs and variable compensation. Support, professional, and educational services, also referred to as “service-related,” headcount 
increased by 19% to 1,064 employees as of December 31, 2010, compared to 891 employees as of December 31, 2009. Total 
personnel-related costs as a percentage of service revenues were relatively flat in 2010 as we continued to manage costs while growing our 
revenues. Information technology (“IT”) expenses related to cost of service revenues increased in 2010 compared to 2009, which is 
commensurate with the increase in headcount. Service gross margin increased in absolute dollars primarily due to increased service revenues, 
and service gross margin as a percentage of service revenues decreased primarily due to a shift in mix that was driven by an increase in 
value-added service related revenue. 

The cost of service revenues and service gross margin increased in 2009 compared to 2008. The increase in cost of 
service revenues was attributable to increased headcount and increased spending on service-related spares. Service 
gross margin increased primarily due to our continued efforts to manage costs. Service-related headcount increased by 
108 employees, or 14%, to 891 employees in 2009, compared to 783 in 2008. Total personnel-related costs as a 
percentage of service revenues were approximately 18% for 2009 and 20% for 2008. The decrease in 
personnel-related costs in 2009 as a percentage of service revenues was primarily due to the overall increase in 
service revenues. Our outside service expense also increased in 2009, 

41  

 
 
  
  
  
Table of Contents 
primarily to support the expanding installed equipment base. Additionally, facilities and IT expenses related to cost of service revenues 
increased in connection with the growth of service business as a portion of our overall operations. 

The decrease in cost of service revenues and operating expenses including R&D, sales and marketing, and G&A expenses, due to foreign 
currency fluctuations was approximately 1%, 2%, and 1% in 2010, 2009, and 2008, respectively. 

Facility and IT departmental costs are allocated to cost of revenues and operating expense based on usage and headcount, respectively. Such 
costs increased by $20.1 million in 2010 compared to 2009 due to an increase in departmental headcount, the continued build-out of our 
domestic and international development and test centers, and IT applications to support our internal operations. Facility and IT related 
headcount was 388, 294, and 267 as of December 31, 2010, 2009, and 2008, respectively. In 2011, we expect to continue to invest in our 
company-wide IT infrastructure as we implement our operational excellence initiatives. 

Operating Expenses 

The following table presents operating expenses and operating income (in millions, except percentages): 

2010 

Years Ended December 31,
2009 

$ Change

  % Change

2009

Years Ended December 31,
2008 

$ Change

% Change

Research and 
development 

$ 

917.9      $

741.7       $ 

176.2   

24  %   $

741.7    $

731.2       $ 

10.5   

Sales and marketing (1) 

857.1     

759.1     

98.0   

13  %  

759.1   

812.0     

(52.9 )  

General and 
administrative 
Amortization of 
purchased intangible 
assets 
Litigation settlement 
charges 

Restructuring charges 

Acquisition-related cost 
Total operating expenses 
(1) 

Operating income 

$ 

$ 

________________________________ 
N/M = Not meaningful 

177.9     

159.5     

18.4   

12  %  

159.5   

144.8     

14.7   

4.2     

10.4     

(6.2 )  

(59

—     

182.3     

(182.3 )  

(100

10.8     

6.3     

19.5     

—     

(8.7 )  

(44

6.3   

N/M 

)
%

)
%

)
%

10.4   

43.5     

(33.1 )  

182.3   

9.0     

173.3   

19.5   

—   

—     

—     

19.5   

—   

1,974.2      $

1,872.5       $ 

101.7   

5  %   $

1,872.5    $

1,740.5       $ 

132.0   

767.6      $

310.7       $ 

456.9   

147  %   $

310.7    $

695.0       $ 

(384.3 )  

1  %

(7

)
%

10  %

(76

)
%

N/M  

N/M  

—  %

8  %

(55

)
%

(1)     Prior period information has been reclassified to conform to the current period's presentation. Refer to Note 1, Basis of Presentation, in Notes to Consolidated Financial 

Statements in Item 8 of Part II of this Annual Report on Form 10-K.

The following table highlights our operating expenses and operating income as a percentage of net revenues: 

Research and development 
Sales and marketing (1) 
General and administrative 
Amortization of purchased intangible assets 
Litigation settlement charges 
Restructuring charges 
Acquisition-related cost 

Years Ended December 31,

2010

2009

2008

22.4 %   
20.9 %   
4.3 %   
0.1 %   
— %   
0.3 %   
0.2 %   

22.4 %  
22.8 %  
4.8 %  
0.3 %  
5.5 %  
0.6 %  
— %  

20.5 %
22.6 %
4.1 %
1.2 %
0.3 %
— %
— %

 
 
  
  
  
  
  
 
   
       
       
   
 
     
     
       
   
 
  
 
  
  
  
 
 
  
 
 
 
 
 
 
 
  
  
 
 
 
 
 
 
 
 
 
  
  
  
 
Total operating expenses (1) 

Operating income 
 ________________________________ 

48.2 %   

18.8 %   

56.4 %  

9.4 %  

48.7 %

19.5 %

(1)     Prior period information has been reclassified to conform to the current period's presentation. Refer to Note 1, Basis of Presentation, in Notes to Consolidated Financial 

Statements in Item 8 of Part II of this Annual Report on Form 10-K.

Personnel-related costs, including wages, commissions, bonuses, vacation, benefits, share-based compensation, and travel, have historically 
been the primary driver of our operating expenses, and we expect this trend to continue. We had 8,772, 7,231, and 7,014 employees as of 
December 31, 2010, 2009, and 2008, respectively. The 2010 year-over-year increase was due to growth across all of our organizations as a 
result of our efforts to grow the business. 

42  

 
 
 
 
  
Table of Contents 

R&D expenses increased in 2010 compared to 2009, primarily due to additional headcount and strategic initiatives to expand our product 
portfolio. In particular, we focused on delivering optical capabilities and a packet-optimized transport system that will help service providers 
better support packet and IP-based services, such as video, mobility and cloud computing. Personnel-related costs increased $111.6 million in 
2010, primarily due to a 25% increase in headcount in our engineering organization, from 3,308 to 4,132 employees, to support product 
innovation intended to capture anticipated future network infrastructure growth and opportunities. Additionally, our outside consulting, 
facilities, and IT costs related to R&D expenses increased to support our R&D efforts. 

R&D expenses increased in 2009 compared to 2008, primarily due to additional headcount and strategic initiatives to expand our product 
portfolio and maintain our technological advantage over competitors. In particular, in 2009, we continued to expand our EX Series switching 
product portfolio and increased our investments in Project Stratus, which was our initiative to deliver the next-generation data center fabric, 
and Project Falcon, which was our effort to develop mobility solutions for service provider customers. Personnel-related costs increased 
$25.6 million in 2009, primarily due to a 4% increase in headcount in our engineering organization, from 3,194 to 3,308 employees, to 
support product innovation intended to capture anticipated future network infrastructure growth and opportunities. Outside consulting and 
other development expense also increased to support our product innovation initiatives. Additionally, facilities and IT expenses related to 
R&D expenses increased to support these engineering efforts. 

Sales and marketing expenses increased in 2010, compared to the same period in 2009, primarily due to our 2010 advertising campaign, 
events for new product launches, and an increase in personnel-related costs of $95.8 million. The increase in personnel-related costs was 
primarily due to a 17% increase in our sales and marketing headcount from 2,101 to 2,466 employees, an increase in variable compensation 
driven by growth in our revenues, and an increase in outside services to support our sales and marketing programs. As a percentage of net 
revenues, sales and marketing expenses decreased slightly in 2010 due to our focus on managing expenses and creating efficiency in our sales 
activities. 

Sales and marketing expenses decreased in 2009 compared to 2008, primarily due to a decrease in personnel-related expenses and travel 
expenses. As a percentage of net revenues, sales and marketing expenses increased slightly in 2009 due to the increased spending related to 
the corporate re-branding and channel marketing campaigns, partially offset by our focus on managing expenses and creating efficiency in 
our sales activities. Personnel-related costs decreased $15.8 million in 2009, primarily due to a 4% decrease in headcount from 2,190 
employees at the end of 2008 to 2,101 employees at the end of 2009. In addition, commission expense decreased by $12.0 million due to 
lower net revenues in 2009 compared to 2008. As our sales force decreased, we also decreased facilities and IT expenses related to the sales 
and marketing organizations in 2009 compared to 2008.    

G&A expenses increased in 2010 compared to 2009, primarily due to an increase in personnel-related expenses. As a percentage of net 
revenues, G&A expenses decreased slightly in 2010 due to our continued focus on managing expenses. Personnel-related costs increased 
$25.0 million in 2010, primarily due to a 14% increase in headcount, from 393 to 449 employees in our worldwide G&A functions to support 
expected future growth of the business, as well as higher variable compensation driven by growth in revenues. Additionally, facilities and IT 
expenses related to our G&A infrastructure increased to support our growing business. 

G&A expenses increased in absolute dollars and as a percentage of net revenues in 2009 compared to 2008, primarily due to an increase in 
personnel-related expenses and outside professional services. Personnel-related costs increased $7.2 million in 2009 compared to 2008, 
primarily due to a 12% increase in headcount, from 350 to 393 employees, in our worldwide G&A functions to support expected future 
growth of the business. Outside professional service fees increased in 2009 compared to 2008 as a result of increased legal fees. Additionally, 
facilities and IT expenses related to our G&A infrastructure increased to support our growing business. 

Amortization of purchased intangible assets decreased in 2010 compared to 2009, and in 2009 compared to 2008, primarily due to certain 
purchased intangible assets reaching the end of their amortization period during 2009. We had no impairment of our goodwill or our 
purchased intangible assets in 2010 and 2009. In 2008, we had no impairment of our goodwill and recognized an impairment charge of 
$5.0 million for our purchased intangible assets, as a result of the phase-out of our DX products. 

In 2009, we recorded litigation settlement charges of $182.3 million, which included $169.0 million related to our agreement in principle 
reached in February 2010, to settle the securities class action litigation pending against us and certain of our current and former officers and 
directors, $13.0 million related to the resolution of a dispute in connection with certain real estate in Sunnyvale California purchased in 2000 
and $0.3 million related to another settlement recorded in the fourth quarter of 2009. 

43  

 
 
  
  
  
  
  
  
  
  
Table of Contents 
Of these amounts, $181.3 million was recorded in the fourth quarter of 2009. In 2008, we recorded a litigation settlement loss of $9.0 million 
related to our shareholder derivative lawsuit. See Note 15, Commitments and Contingencies, in Notes to Consolidated Financial Statements 
in Item 8 of Part II of this Annual Report on Form 10-K, for more information. No such charges were incurred in 2010. 

In 2010 and 2009, we recorded $10.8 million and $19.5 million, respectively, as a result of a restructuring plan to reduce our real estate 
portfolio and workforce in targeted areas of the Company. There were no restructuring charges in 2008. As of December 31, 2010, the 2009 
Restructuring Plan was complete. See Note 8, Other Financial Information, in Notes to Consolidated Financial Statements in Item 8 of Part II 
of this Annual Report on Form 10-K, for more information regarding our restructuring liabilities. 

In 2010, we recorded $6.3 million in direct and indirect acquisition-related costs such as financial advisory, legal, due diligence, and 
integration costs from the acquisitions of Ankeena, SMobile, Altor, and Trapeze. See Note 3, Business Combinations, in Notes to 
Consolidated Financial Statements in Item 8 of Part II of this Annual Report on Form 10-K, for further discussion of these acquisitions. There 
were no acquisitions or acquisition-related charges recorded in 2009 and 2008. 

Share-Based Compensation 

The Company's share-based compensation expense associated with stock options, ESPP, RSUs, and PSAs is recorded in the following 
categories for each of the three years ended December 31, 2010 (in millions, except percentages): 

Cost of revenues - Product  $ 
Cost of revenues - Service 
(1) 
Research and development 
Sales and marketing (1) 
General and administrative 
Total 
________________________________ 

2010 

2009 

4.4       $ 

3.9      $

13.5     

78.5     
54.9     
30.7     
182.0     

10.5     

59.3     
43.1     
22.9     
139.7     

Years Ended December 31,

$ Change

  % Change

2009

Years Ended December 31,
2008 

$ Change

% Change

0.5   

3.0   

19.2   
11.8   
7.8   

42.3   

13 %   $

3.9    $

29 %  

32 %  

27 %  

34 %  

30 %  

10.5   

59.3   
43.1   
22.9   

139.7   

3.0      $ 

9.2     

47.0     
36.2     
12.7     
108.1     

0.9   

1.3   

12.3   
6.9   
10.2   

31.6   

32 %

14 %

26 %

19 %

80 %

29 %

(1)     Prior period information has been reclassified to conform to the current period's presentation. Refer to Note 1, Basis of Presentation, in Notes to Consolidated Financial 

Statements in Item 8 of Part II of this Annual Report on Form 10-K.

The 2010 share-based compensation expense includes the value of vested restricted shares paid to certain former Ankeena employees. Refer 
to Note 5, Cash, Cash Equivalents, and Investments, under the heading "Restricted Cash" in Notes to Consolidated in Financial Statements in 
Item 8 of Part II of this Annual Report on Form 10-K. 

Share-based compensation expense increased in 2010 compared to 2009 due to an increase in RSU and PSA grants during the period 
primarily resulting from an increase in the number of participants. The increase in 2009 compared to 2008 primarily relates to new stock 
option grants, particularly in late 2008. 

Interest and Other Income, net, Gain (Loss) on Equity Investments, and Income Tax Provision 

The following table presents interest and other income, net, gain (loss) on equity investments, and income tax provision (in millions, except 
percentages): 

Years Ended December 31,

2010 

2009 

$ Change

  % Change

2009

Years Ended December 31,

2008 

$ Change

  % Change

$ 

1.9  

   $ 

6.9   

   $ 

(5.0 )  

(72

)
%

  $

6.9  

  $

48.7   

   $ 

(41.8 )  

(86

)
%

N/M  

8.7  

0.2  %   

(5.5 ) 

14.2   

256  %  

(5.5 )

0.2  %  

1.4  %   

(14.8 ) 

9.3   

(63 )

Interest and 
other income, 
net 
Percentage of 
net revenues  
Gain (loss) on 

 
 
  
  
  
  
  
 
   
       
       
   
 
     
     
       
   
 
  
 
  
  
  
 
 
  
 
 
 
  
  
  
  
  
 
   
 
     
 
     
   
 
     
 
     
 
     
   
 
  
 
  
  
  
 
 
  
  
   
   
 
   
   
  
  
 
  
equity 
investments 
Percentage of 
net revenues  
Income tax 
provision 

0.2 %   

(0.2

)
%    

158.8  

196.8  

(38.0 )  

(19

)
%

(0.2

)
%

196.8  

(0.4

)
%    

217.2  

(20.4 )  

%

(9

)
%

Net interest and other income decreased in 2010 compared to 2009, and in 2009 compared to 2008, primarily due to lower 

44  

 
 
   
   
 
 
   
   
  
  
 
 
  
  
Table of Contents 
interest rates and an increase in customer financing charges during 2010. 

In 2010, we recognized a total gain of $8.7 million, primarily due to acquisitions of our privately-held equity investments in Ankeena and 
Altor. There were no impairment charges related to our equity investments in the year ended December 31, 2010. During 2009 and 2008, we 
recognized impairment losses of $5.5 million and $14.8 million, respectively, on our equity investments for changes in fair value that we 
believed were other-than-temporary. 

Our effective tax rates were 20.4%, 63.1%, and 29.8% in 2010, 2009, and 2008, respectively. The decrease in overall rate in 2010 compared 
to 2009, and the federal statutory rate of 35%, was primarily due to a $54.1 million income tax benefit recorded during the Company's first 
quarter resulting from a change in the Company's estimate of unrecognized tax benefits due to the taxpayer favorable ruling by the U.S. Court 
of Appeals for the Ninth Circuit (the “Court”) in Xilinx Inc. v. Commissioner related to share-based compensation, the federal R&D credit, 
and the benefit of earnings in foreign jurisdictions, which are subject to lower tax rates. 

The increase in the overall rate in 2009 compared to 2008, and the federal statutory rate of 35%, was primarily due to the following income 
tax charges: (i) a $61.8 million discrete and other related charge that resulted from changes in California income tax laws that were enacted 
during 2009; (ii) a $52.1 million charge that resulted from a change in our unrecognized tax benefits related to share-based compensation ; 
and (iii) a $4.6 million charge which related to an investigation by the India tax authorities. The effective rate impact from these charges was 
partially offset by the federal R&D credit and the benefit of earnings in foreign jurisdictions, which are subject to lower tax rates. 

The 2008 effective tax rate differs from the federal statutory rate of 35% primary due to the federal R&D credit and the benefit of earnings in 
foreign jurisdictions, which are subject to lower tax rates. 

For a complete reconciliation of our effective tax rate to the U.S. federal statutory rate of 35% and further explanation of our income tax 
provision, see Note 14, Income Taxes, in Notes to Consolidated Financial Statements in Item 8 of Part II of this Annual Report on 
Form 10-K. 

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Table of Contents 
Segment Information 

For a description of the products and services for each segment, see Item 1 Business, in Part I of this Annual Report on Form 10-K. A 
description of the measures included in management operating income can also be found in Note 13, Segment Information, in Notes to the 
Consolidated Financial Statements in Item 8 of Part II of this Annual Report on Form 10-K. 

Select segment financial data for each of the three years in the period ended December 31, 2010, is as follows (in millions, except 
percentages): 

Years Ended December 31,

2010 

2009 

$ Change

  % Change

2009

Years Ended December 31,
2008 

$ Change

  % Change

Net revenues: 

Infrastructure: 

Product 

Service 

$ 

2,511.6  

   $ 

1,959.2  

  $

552.4   

28 %   $ 1,959.2  

  $

2,301.9  

   $ 

(342.7 )  

(15

)
%

538.7  

482.4  

56.3   

12 %  

482.4 

424.0  

58.4   

14  %

Total Infrastructure 
revenues 

3,050.3  

2,441.6  

608.7   

25 %  

2,441.6  

2,725.9  

(284.3 )  

(10

)
%

SLT: 

Product 

Service 

747.1  

295.9  

608.8  

265.5  

138.3   

23 %  

608.8 

30.4   

11 %  

265.5 

609.1  

237.4  

(0.3 )  

N/M 

28.1   

12  %

Total SLT revenues 

1,043.0  

874.3  

168.7   

19 %  

874.3 

846.5  

27.8   

3  %

Total net revenues 

Operating income : 

4,093.3  

3,315.9  

777.4   

23 %  

3,315.9  

3,572.4  

(256.5 )  

Infrastructure 

773.7  

541.4  

232.3   

43 %  

541.4  

806.0  

(264.6 )  

(7

)
%

(33

)
%

Percentage of 
Infrastructure revenues 

25.4 %   

22.2 %     

22.2 %  

29.6 %      

SLT 

208.0  

127.0  

81.0   

64 %  

127.0 

65.8  

61.2   

93  %

Percentage of SLT 
revenues 

19.9 %   

14.5 %     

14.5 %  

7.8 %      

 
 
 
  
  
 
   
 
     
 
     
   
 
     
 
     
 
     
   
 
  
 
  
  
 
 
 
  
   
  
   
 
   
  
 
 
 
   
  
   
  
   
  
   
 
   
  
 
 
 
   
  
   
  
  
 
 
  
  
 
 
  
  
     
 
     
 
 
 
   
  
   
  
  
 
 
  
  
 
 
  
  
 
 
  
  
 
 
  
  
     
 
     
 
 
 
   
  
   
  
  
 
 
  
    
 
    
  
 
 
  
    
 
    
$ 

Total segment operating 
income (1) 
________________________________ 
(1)      A reconciliation of total segment operating income to income before taxes and noncontrolling interest, can be found in Note 13, Segment Information, in Notes to the 
Consolidated Financial Statements in Item 8 of Part II of this Annual Report on Form 10-K. 

668.4  

981.7  

668.4  

871.8  

313.3   

(203.4 )  

47 %   $

   $ 

   $ 

  $

  $

(23

)
%

Infrastructure Segment 

An analysis of the change in revenues for the Infrastructure segment, and the change in revenue units, can be found above in the section titled 
“Infrastructure Segment Revenues.” 

Infrastructure operating income increased as a percent of Infrastructure revenue in 2010 compared to 2009, primarily due to a higher gross 
margin percentage, which was attributable to changes in product mix that favored higher margin products. Additionally, although 
Infrastructure sales and marketing expenses increased in absolute dollars as we increased our efforts to reach enterprise and service provider 
customers, they decreased as a percentage of Infrastructure revenues. 
Infrastructure segment operating income as a percent of revenue decreased in 2009 compared to 2008, primarily due to a lower gross margin 
percentage that was driven by changes in product mix and to a lesser extent pricing. Additionally R&D expenses increased as a percentage of 
Infrastructure revenue in 2009 as we continued to make investments to expand our product features and functionality and Sales and 
Marketing expenses increased slightly as a percentage of Infrastructure revenue, as we increased our efforts to reach enterprise and service 
provider customers. 
SLT Segment 

An analysis of the change in revenues for the SLT segment, and the change in units, can be found above in the section titled “SLT Segment 
Revenues.” 

SLT operating income increased as a percent of revenue in 2010 compared to 2009 due primarily due to a decrease in operating expenses as a 
percent of SLT revenue as we continued our efforts to carefully manage costs. Additionally, the increase was attributable to higher gross 
margin percentage resulting from changes in product mix and efficiencies achieved from the higher 

46  

 
 
  
  
  
  
  
Table of Contents 
2010 revenues. 

SLT operating income increased as a percentage of revenue in 2009 compared to 2008, primarily due to lower R&D and other operating 
expenses as a percent of SLT revenue from reductions in discretionary spending as a part of our cost control initiatives and higher gross 
margin percentage from changes in product mix. 

Key Performance Measures 

In addition to the financial metrics included in the consolidated financial statements, we use the following key performance measures to 
assess operating results: 

Days sales outstanding (“DSO”)(1) 
Book-to-bill ratio(2) 
________________________________ 
(1)    DSO is calculated as the ratio of ending accounts receivable, net of allowances, divided by average daily net sales for the preceding 90 days. 
(2)    Book-to-bill ratio represents the ratio of product orders booked divided by product revenues during the respective period. 

45    
>1    

44   
>1   

42 
>1 

Years Ended December 31,

2010 

2009

2008

Liquidity and Capital Resources 

The following sections discuss the effects of changes in our consolidated balance sheets and statements of cash flows, contractual obligations, 
and our stock repurchase program on our liquidity and capital resources. 

Overview 

Historically, we have funded our business primarily through our operating activities and, to a lesser extent, the issuance of our common stock. 
The following table shows our capital resources (in millions, except percentages): 

Working capital 

Cash and cash equivalents 

Short-term investments 

Long-term investments 

Years Ended December 31,

2010

$

$

1,742.4   

1,811.9   

$

$

2009
1,503.2    

1,604.7    

$ 

$ 

474.5    

535.2   

570.5    

483.5    

239.2 

207.2 

(96.0 )   

51.7 

$ Change

% Change

Total cash, cash equivalents, and investments 

$

2,821.6   

$

2,658.7    

$ 

162.9 

16  %

(17

13  %
)
%
11  %

6  %

The significant components of our working capital are cash and cash equivalents, accounts receivable and short term investments, reduced by 
deferred revenue, accrued liabilities and accounts payable. The increase in working capital from December 31, 2009, to December 31, 2010, 
is primarily due to higher cash and cash equivalents, higher accounts receivable due to the timing of shipments at the end of the period, higher 
prepaid income taxes, partially offset by a decrease in accrued litigation settlements. 

Stock Repurchase Activities 

In February 2010, the Board of Directors (the “Board”) approved a new stock repurchase program (the “2010 Stock Repurchase Program”) 
under which we are authorized to repurchase up to $1.0 billion of our common stock. This new authorization is in addition to the stock 
repurchase program approved by the Board in March 2008 (the “2008 Stock Repurchase Program”), under which we were also authorized to 
repurchase up to $1.0 billion of our common stock. 

Under the two stock repurchase programs, we repurchased approximately 19.7 million shares of our common stock at an average price of 

 
 
  
  
 
  
  
 
 
   
 
 
 
  
  
 
 
  
 
  
  
  
 
   
 
   
 
   
   
 
 
  
  
  
 
 
  
 
  
 
 
 
 
 
  
  
  
  
$28.67 per share for a total purchase price of $563.5 million in the year ended December 31, 2010, and approximately 20.7 million shares of 
our common stock at an average price of $21.91 per share for a total purchase price of $453.5 million in the year ended December 31, 2009. 
As of December 31, 2010, there were no remaining authorized funds under the 2008 Stock Repurchase Program and $755.1 million 
remaining authorized funds under the 2010 Stock Repurchase Program. 

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In addition to repurchases under our stock repurchase programs, we also had broker-transacted repurchases of common stock from our 
employees in connection with net issuance of shares to satisfy tax withholding obligations for the vesting of certain RSUs and PSAs. The 
repurchases were for approximately 0.1 million shares of our common stock at an average price of $25.75 per share for an aggregate purchase 
price of $1.9 million in connection with the net issuances during the year ended December 31, 2010. There was an immaterial amount of 
broker-transacted repurchases of common stock from our employees in connection with net issuance of shares during year ended 
December 31, 2009. 

All shares of common stock repurchased under the 2008 and 2010 stock repurchase programs and from our employees in connection with net 
issuances have been retired. Future share repurchases under the 2010 Stock Repurchase Program will be subject to a review of the 
circumstances in place at that time and will be made from time to time in private transactions or open market purchases as permitted by 
securities laws and other legal requirements. This program may be discontinued at any time. See Note 18, Subsequent Events, for discussion 
of our stock repurchase activity in 2011. 

Summary of Cash Flows 

In the year ended December 31, 2010, cash and cash equivalents increased by $207.2 million. This increase was the result of cash generated 
from our operating activities of $812.3 million, partially offset by cash used in our investing and financing activities of $532.8 million and 
$72.4 million, respectively. 

Operating Activities 

Net cash provided by operating activities was $812.3 million, $796.1 million, and $875.2 million for 2010, 2009, and 2008, respectively. The 
increase of $16.2 million from fiscal 2009 to fiscal 2010 was primarily due to higher net income, partially offset by litigation settlement 
payments, prepaid taxes, and higher accounts receivable. Operating cash flow decreased by $79.1 million from fiscal 2008 to fiscal 2009, 
primarily due to lower net income, partially offset by increase in other accrued liabilities due to the litigation settlement reached in the fourth 
quarter of 2009. 

Investing Activities 

Net cash used in investing activities was $532.8 million, $948.3 million, and $149.8 million in 2010, 2009, and 2008, respectively. The 
change between periods was primarily due to the movement of cash between cash and cash equivalents and short- and long-term investments 
due to our investment strategy. The change from 2009 to 2010 was further impacted by net cash paid for acquisitions in 2010. 

Financing Activities 

Net cash used in financing activities was $72.4 million, $262.2 million, and $422.4 million for 2010, 2009, and 2008, respectively. The 
change between periods was due to an increase in cash used to repurchase our common stock through our stock repurchase programs, which 
was partially offset by greater cash proceeds from issuance of common stock to employees for each period as the result of the higher stock 
prices. 

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Deferred Revenue 

The following table summarizes our deferred product and service revenues (in millions): 

Deferred product revenue: 

Undelivered product commitments and other product deferrals

$

294.1    $

As of December 31,

2010 

2009

Distributor inventory and other sell-through items 

Deferred gross product revenue 

Deferred cost of product revenue 

Deferred product revenue, net 
Deferred service revenue 

Total 

Reported as: 

Current 

Long-term 

Total 

143.4   

437.5   

254.7 

136.6 

391.3 

(148.8 )  

(150.0 )

288.7   
595.7   

884.4    $

660.2    $

224.2   

884.4    $

241.3 
512.3 

753.6 

571.7 

181.9 

753.6 

$

$

$

Deferred gross product revenue as of December 31, 2010, increased $46.2 million compared to December 31, 2009, primarily due to an 
increase in undelivered product commitments and other product deferrals. Total deferred service revenue increased $83.4 million compared 
to December 31, 2009, largely due to higher sales of service contracts and multi-year service billings. 

Off-Balance Sheet Arrangements 

We had no off-balance sheet arrangements as of December 31, 2010, and 2009. 

Contractual Obligations 

Our principal commitments consist of obligations outstanding under operating leases, purchase commitments, tax liabilities, and other 
contractual obligations. The following table summarizes our principal contractual obligations as of December 31, 2010, and the effect such 
obligations are expected to have on our liquidity and cash flow in future periods (in millions): 

Total  

Less than 
1 Year

1-3 Years  

3-5 Years  

   More than 
5 Years 

Other  

$ 

Operating leases (1) 
Purchase commitments (2) 
Tax liabilities (3) 
Other contractual obligations (4) 
Total 
________________________________ 
(1)    Our contractual obligations under operating leases primarily relate to our leased facilities under our non-cancelable operating leases. Rent payments are allocated to costs 
and operating expenses in our consolidated statements of operations. We occupy approximately 2.2 million square feet worldwide under operating leases. The majority of our 

65.2      $ 
—     
—     
—     
65.2      $ 

296.3    $
198.6   
103.9   
95.1   

110.3    $
—   
—   
29.3   

51.1    $
198.6   
—   
65.8   

69.7    $
—   
—   
—   

— 
— 
103.9 
— 

315.5    $

693.9    $

139.6    $

69.7    $

103.9 

$ 

 
 
  
  
 
   
 
   
  
  
 
 
 
 
 
 
 
  
  
  
  
  
 
   
     
     
     
       
     
  
 
 
 
 
office space is in North America, including our corporate headquarters in Sunnyvale, California. Our longest lease expires on November 22, 2022. 
(2)    In order to reduce manufacturing lead times and ensure adequate component supply, our contract manufacturers place non-cancelable, non-returnable (“NCNR”) orders for 
components based on our build forecasts. The contract manufacturers use the components to build products based on our forecasts and on purchase orders we have received from 
our customers. Generally, we do not own the components and title to the product transfers from the contract manufacturers to us and immediately to our customers upon delivery 
at a designated shipment location. If the components go unused or the products go unsold for specified periods of time, we may incur carrying charges or obsolete materials 
charges for components that our contract manufacturers purchased to build products to meet our forecast or customer orders. As of December 31, 2010, we had accrued $22.7 
million based on our estimate of such charges. Total purchase commitments as of December 31, 2010, consisted of $198.6 million of NCNR orders. 
(3)    Tax liabilities include $103.9 million of long-term liabilities in the consolidated balance sheet for unrecognized tax positions. At this time, we are unable to make a 
reasonably reliable estimate of the timing of payments related to this amount due to uncertainties in the timing of tax audit outcomes. 
(4)    Other contractual obligations consists of $65.0 million of indemnity-related and service-related escrows required by certain acquisitions completed in 2005 and 2010, $13.2 
million remaining balance for a data center hosting agreement that requires payments through the end of April 2013, $9.2 million for license and service agreements, and $7.7 
million under a software subscription agreement that requires payments through the end of January 2011. 

49  

 
 
  
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Guarantees 

We have entered into agreements with some of our customers that contain indemnification provisions relating to potential situations where 
claims could be alleged that our products infringe on the intellectual property rights of a third party. Other guarantees or indemnification 
arrangements include guarantees of product and service performance, standby letters of credit for certain lease facilities, and guarantees 
related to third-party customer financing arrangements. As of December 31, 2010, we had $21.6 million in guarantees and standby letters of 
credit. As of December 31, 2009, we had $34.0 million in guarantees and standby letters of credit. 

Liquidity and Capital Resource Requirements 

Liquidity and capital resources may be impacted by our operating activities as well as acquisitions and investments in strategic relationships 
we may make in the future. Additionally, if we were to repurchase additional shares of our common stock under our stock repurchase 
programs, our liquidity may be impacted. As of December 31, 2010, over 60% of our cash, cash equivalents, and marketable securities were 
held outside of the U.S., which may be subject to U.S. taxes if repatriated. 

In August 2010, we filed a $1.5 billion shelf registration with the SEC. The filing replaced our prior $1.0 billion shelf registration which had 
expired. The shelf registration is intended to give us flexibility to take advantage of financing opportunities as needed or deemed desirable in 
light of market conditions. Any offerings of securities will be made pursuant to a prospectus. 

We have been focused on managing our annual equity usage as a percentage of the common stock outstanding to align with peer group 
competitive levels and have made changes in recent years to reduce the number of shares underlying the equity awards we grant. Our 
intention for fiscal year 2010 was and fiscal year 2011 is to target the number of shares underlying equity awards granted on an annual basis 
at approximately three percent (3%) of our common stock outstanding. Based upon shares underlying our grants to date of options, RSUs, 
and PSAs (counting only the on-target measure of such PSAs), we achieved that goal with respect to 2010, and we believe we are on track 
with respect to this goal for 2011. 

Based on past performance and current expectations, we believe that our existing cash and cash equivalents, short-term and long-term 
investments, together with cash generated from operations and cash generated from the exercise of employee stock options and purchases 
under our employee stock purchase plan will be sufficient to fund our operations and anticipated growth for at least the next 12 months. We 
believe our working capital is sufficient to meet our liquidity requirements for capital expenditures, commitments, and other liquidity 
requirements associated with our existing operations during the same period. However, our future liquidity and capital requirements may vary 
materially from those now planned depending on many factors, including: 

•     

the overall levels of sales of our products, the mix of product sales, and gross profit margins; 

•     

our business, product, capital expenditures, and R&D plans;

•     

repurchases of our common stock; 

•     

incurrence and repayment of debt; 

•     

litigation expenses, settlements, and judgments, or similar items related to resolution of tax audits; 

 
 
  
  
  
  
  
  
  
 
 
  
 
 
  
 
 
  
 
 
  
 
 
  
•     

volume price discounts and customer rebates; 

•     

the levels of accounts receivable that we maintain;

•     

acquisitions of other businesses, assets, products, or technologies;

•     

changes in our compensation policies; 

•     

capital improvements for new and existing facilities;

•     

our competitors' responses to our products; 

•     

our relationships with suppliers, partners, and customers;

•     

possible future investments in raw material and finished goods inventories;

50  

 
 
 
 
  
 
 
  
 
 
  
 
 
  
 
 
  
 
 
  
 
 
  
 
 
  
Table of Contents 

•     

expenses related to our future restructuring plans, if any;

•     

tax expense associated with stock-based awards;

•     

issuance of stock-based awards and the related payment in cash for withholding taxes in the current year and possibly during future 
years; 

•     

the level of exercises of stock options and stock purchases under our equity incentive plans; and 

•     

general economic conditions and specific conditions in our industry and markets, including the effects of disruptions in global credit 
and financial markets, international conflicts, and related uncertainties.

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ITEM 7A.    Quantitative and Qualitative Disclosure about Market Risk 

Interest Rate Risk 

We maintain an investment portfolio of various holdings, types, and maturities. The value of our investments is subject to market price 
volatility. In addition, as of December 31, 2010, over 60% of our cash, cash equivalents, and marketable securities are held in 
non-U.S. domiciled countries. Our marketable securities are generally classified as available-for-sale and, consequently, are recorded on our 
consolidated balance sheet at fair value with unrealized gains or losses reported as a separate component of accumulated other comprehensive 
income (loss). 

At any time, a rise in interest rates could have a material adverse impact on the fair value of our investment portfolio. Conversely, a decline in 
interest rates could have a material impact on interest income from our investment portfolio. We do not currently hedge these interest rate 
exposures. We recognized immaterial gains and losses during the years ended December 31, 2010, 2009, and 2008, related to the sales of our 
investments. 

The following tables present hypothetical changes in fair value of the financial instruments held at December 31, 2010, and 2009, that are 
sensitive to changes in interest rates (in millions): 

Valuation of Securities Given an Interest Rate Decrease of X 
BPS  
(100 BPS) 

(150 BPS)  

(50 BPS) 

  Fair Value as of 
December 31, 
2010 

Valuation of Securities Given an Interest Rate Increase of X 
BPS 

50 BPS  

100 BPS 

150 BPS 

Government treasury and 
agencies 
Corporate bonds and notes 
Foreign government debt 
securities 
Other 
Total 

$ 

457.4      $ 

456.3    $

455.1    $

454.1    $

452.8      $ 

451.7    $

450.5 

469.9     

47.8     

467.2   

464.4   

461.7   

47.5   

47.3   

47.0   

459.0     

46.8     

456.2   

46.5   

453.5 

46.3 

1,291.6     
2,266.7      $ 

$ 

1,291.2   

1,290.7   

1,290.1   

2,262.2    $

2,257.5    $

2,252.9    $

1,289.7     
2,248.3      $ 

1,289.2   

1,288.7 

2,243.6    $

2,239.0 

Valuation of Securities Given an Interest Rate Decrease of X 
BPS  
(100 BPS) 

(150 BPS)  

(50 BPS) 

  Fair Value as of 
December 31, 
2009 

Valuation of Securities Given an Interest Rate Increase of X 
BPS 

50 BPS  

100 BPS 

150 BPS 

Government treasury and 
agencies 
Corporate bonds and notes 
Foreign government debt 
securities 
Other 
Total 

$ 

461.3      $ 

460.0    $

458.7    $

457.3    $

456.1      $ 

454.8    $

453.4 

495.4     

98.2     

493.5   

491.6   

489.8   

97.7   

97.2   

96.7   

487.9     

96.2     

486.0   

95.7   

484.2 

95.2 

1,099.7     
2,154.6      $ 

$ 

1,099.7   

1,099.7   

1,099.7   

2,150.9    $

2,147.2    $

2,143.5    $

1,099.6     
2,139.8      $ 

1,099.6   

1,099.6 

2,136.1    $

2,132.4 

These instruments are not leveraged and are held for purposes other than trading. The modeling technique used measures the changes in fair 
value arising from selected potential changes in interest rates. Market changes reflect immediate hypothetical parallel shifts in the yield curve 
of plus or minus 50 basis points (“BPS”), 100 BPS, and 150 BPS, which are representative of the historical movements in the Federal Funds 
Rate. 

Foreign Currency Risk and Foreign Exchange Forward Contracts 

Periodically, we use derivatives to hedge against fluctuations in foreign exchange rates. We do not enter into derivatives for speculative or 
trading purposes. 

We use foreign currency forward contracts to mitigate variability in gains and losses generated from the re-measurement of certain monetary 

 
 
 
  
  
  
  
  
 
   
       
     
     
     
       
     
  
 
  
  
 
 
 
  
 
  
 
   
       
     
     
     
       
     
  
 
  
  
 
 
 
  
 
   
  
  
  
assets and liabilities denominated in non-functional currencies. These derivatives are carried at fair value with changes recorded in other 
income (expense) in the same period as the changes in the fair value from the re-measurement of the underlying assets and liabilities. These 
foreign exchange contracts have maturities of approximately two months. 

Our sales and costs of product revenues are primarily denominated in U.S. Dollars. Our cost of service revenue and operating 

52  

 
 
  
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expenses are denominated in U.S. Dollars as well as other foreign currencies including the British Pound, the Euro, Indian Rupee, and 
Japanese Yen. Periodically, we use foreign currency forward and/or option contracts to hedge certain forecasted foreign currency transactions 
relating to cost of service revenue and operating expenses. These derivatives are designated as cash flow hedges and have maturities of less 
than one year. The effective portion of the derivative's gain or loss is initially reported as a component of accumulated other comprehensive 
income (loss) and, upon occurrence of the forecasted transaction, is subsequently reclassified into the line item in the consolidated statements 
of operations to which the hedged transaction relates. We record the ineffectiveness of the hedging instruments, which was immaterial during 
the years ended December 31, 2010, 2009, and 2008, respectively, in other income (expense) on our consolidated statements of operations. 
The change in operating expenses including cost of service revenue, R&D, sales and marketing, and G&A expenses, due to foreign currency 
fluctuations was approximately 1%, 2%, and 1% in 2010, 2009, and 2008, respectively. 

Equity Price Risk 

Our portfolio of publicly-traded equity securities and our non-qualified deferred compensation (“NQDC”) plan, which may also hold 
publicly-traded equity securities, are inherently exposed to equity price risk as the stock market fluctuates. Our publicly-traded equity 
securities are classified as available-for-sale securities on our consolidated balance sheets. Investments under the NQDC plan are considered 
trading securities and are also reported at fair value on our consolidated balance sheet. We do not purchase our publicly-traded equity 
securities with the intent to use them for speculative purposes. As of December 31, 2010, we no longer have any investments in 
publicly-traded equity securities. The aggregate fair value of our publicly-traded equity securities as of December 31, 2009, was $5.4 million. 
As of December 31, 2010, and 2009, the total investments under the NQDC plan were $8.1 million and $4.7 million, respectively. A 
hypothetical 30% adverse change on the total investments under the NQDC plan as of December 31, 2010, and 2009 would result in an 
immaterial loss. 

We monitor our portfolio publicly-traded equity investments for impairment on a periodic basis. In the event that the carrying value of a 
public-traded equity investment exceeds its fair value, and we determine the decline in value to be other than temporary, we reduce the 
carrying value to its current fair value. There were no impairment charges in 2010 and 2009 to our portfolio of publicly-traded equity 
investments, and in 2008, we realized an impairment charge of $3.5 million. 

In addition to publicly-traded equity securities, we have also invested in privately-held companies. These investments are carried at cost. In 
2009 we realized an impairment charge of $5.5 million on our investments in privately-held companies that we judged to be other than 
temporary as discussed in Note 6, Fair Value Measurements, in Notes to Consolidated Financial Statements in Item 8 of Part II of this Annual 
Report on Form 10-K. There were no such charges in 2010. The aggregate cost of our investments in privately-held companies was $22.1 
million and $13.9 million as of December 31, 2010, and 2009, respectively. 

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ITEM 8.    Financial Statements and Supplementary Data 

Index of Consolidated Financial Statements for the years ended December 31, 2010, 2009, and 2008. 

CONTENTS 
Report of Independent Registered Public Accounting Firm
Report of Independent Registered Public Accounting Firm
Management's Report on Internal Control Over Financial Reporting
Consolidated Statements of Operations 
Consolidated Balance Sheets 
Consolidated Statements of Cash Flows 
Consolidated Statements of Changes in Equity 
Notes to Consolidated Financial Statements 

54  

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55
56
57
58
59
60
61
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Report of Independent Registered Public Accounting Firm 

The Board of Directors and Stockholders of Juniper Networks, Inc. 

We have audited the accompanying consolidated balance sheets of Juniper Networks, Inc. as of December 31, 2010 and 2009, and the related 
consolidated statements of operations, stockholders' equity, and cash flows for each of the three years in the period ended December 31, 
2010. Our audits also included the financial statement schedule listed in the Index at Item 15(a)2. These financial statements and schedule are 
the responsibility of the Company's management. Our responsibility is to express an opinion on these financial statements and schedule based 
on our audits. 

We conducted our audits in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those 
standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material 
misstatement. An audit includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements. An 
audit also includes assessing the accounting principles used and significant estimates made by management, as well as evaluating the overall 
financial statement presentation. We believe that our audits provide a reasonable basis for our opinion. 

In our opinion, the financial statements referred to above present fairly, in all material respects, the consolidated financial position of Juniper 
Networks, Inc., at December 31, 2010, and 2009, and the consolidated results of its operations and its cash flows for each of the three years in 
the period ended December 31, 2010, in conformity with U.S. generally accepted accounting principles. Also, in our opinion, the related 
financial statement schedule, when considered in relation to the basic financial statements taken as a whole, presents fairly in all material 
respects the information set forth therein. 

As discussed in Note 2, Summary of Significant Accounting Policies, in Notes to Consolidated Financial Statements in Item 8 of Part II of 
this Annual Report on Form 10-K, in fiscal year 2010, Juniper Networks, Inc. changed its method of accounting for revenue recognition with 
the adoption of amendments to the Financial Accounting Standards Board ("FASB") Accounting Standards Codification ("ASC") resulting 
from Accounting Standards Update No. 2009-13, Multiple-Deliverable Revenue Arrangements, and Accounting Standards Update 
No. 2009-14, Certain Revenue Arrangements That Include Software Elements, both adopted effective January 1, 2010. 

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States), Juniper 
Networks, Inc.'s internal control over financial reporting as of December 31, 2010, based on criteria established in Internal Control-Integrated 
Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission and our report dated February 25, 2011 
expressed an unqualified opinion thereon. 

/s/  Ernst & Young LLP 

San Jose, California 
February 25, 2011 

55  

 
 
 
  
  
  
  
  
  
  
  
  
Table of Contents 

Report of Independent Registered Public Accounting Firm 

The Board of Directors and Stockholders of Juniper Networks, Inc. 

We have audited Juniper Networks, Inc.'s internal control over financial reporting as of December 31, 2010, based on criteria established in 
Internal Control - Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (the COSO 
criteria). Juniper Networks, Inc.'s management is responsible for maintaining effective internal control over financial reporting, and for its 
assessment of the effectiveness of internal control over financial reporting included in the accompanying Management's Report on Internal 
Control Over Financial Reporting. Our responsibility is to express an opinion on the company's internal control over financial reporting based 
on our audit. 

We conducted our audit in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those 
standards require that we plan and perform the audit to obtain reasonable assurance about whether effective internal control over financial 
reporting was maintained in all material respects. Our audit included obtaining an understanding of internal control over financial reporting, 
assessing the risk that a material weakness exists, testing and evaluating the design and operating effectiveness of internal control based on 
the assessed risk, and performing such other procedures as we considered necessary in the circumstances. We believe that our audit provides 
a reasonable basis for our opinion. 

A company's internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of 
financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting 
principles. A company's internal control over financial reporting includes those policies and procedures that (1) pertain to the maintenance of 
records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (2) provide 
reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally 
accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of 
management and directors of the company; and (3) provide reasonable assurance regarding prevention or timely detection of unauthorized 
acquisition, use or disposition of the company's assets that could have a material effect on the financial statements. 

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any 
evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or 
that the degree of compliance with the policies or procedures may deteriorate. 

In our opinion, Juniper Networks, Inc. maintained, in all material respects, effective internal control over financial reporting as of 
December 31, 2010, based on the COSO criteria. 

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States), the consolidated 
balance sheets of Juniper Networks, Inc. as of December 31, 2010, and 2009 and the related consolidated statements of operations, 
stockholders' equity, and cash flows for each of the three years in the period ended December 31, 2010, of Juniper Networks, Inc. and our 
report dated February 25, 2011, expressed an unqualified opinion thereon. 

/s/  Ernst & Young LLP 

San Jose, California 
February 25, 2011 

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Management's Report on Internal Control Over Financial Reporting 

The management of Juniper Networks, Inc. (the “Company”) is responsible for establishing and maintaining adequate internal control over 
financial reporting for the Company. The Company's internal control over financial reporting is a process designed under the supervision of 
the Company's principal executive and principal financial officers to provide reasonable assurance regarding the reliability of financial 
reporting and the preparation of the Company's financial statements for external purposes in accordance with U.S. generally accepted 
accounting principles. 

The Company's internal control over financial reporting includes those policies and procedures that: (i) pertain to the maintenance of records 
that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the Company; (ii) provide reasonable 
assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with U.S. generally accepted 
accounting principles, and that receipts and expenditures of the Company are being made only in accordance with authorizations of 
management and directors of the Company; and (iii) provide reasonable assurance regarding prevention or timely detection of unauthorized 
acquisition, use, or disposition of the Company's assets that could have a material effect on the consolidated financial statements. 

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any 
evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or 
that the degree of compliance with the policies or procedures may deteriorate. 

Management assessed the effectiveness of the Company's internal control over financial reporting as of December 31, 2010, based on the 
framework set forth by the Committee of Sponsoring Organizations of the Treadway Commission (“COSO”) in Internal Control - Integrated 
Framework. Based on that assessment, management concluded that, as of December 31, 2010, the Company's internal control over financial 
reporting was effective. 

The effectiveness of the Company's internal control over financial reporting as of December 31, 2010, has been audited by Ernst & Young 
LLP, the independent registered public accounting firm that audits the Company's consolidated financial statements, as stated in their report 
preceding this report, which expresses an unqualified opinion on the effectiveness of the Company's internal control over financial reporting 
as of December 31, 2010. 

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Net revenues: 

Product 

Service 

Total net revenues 
Cost of revenues: 

Product 

Service 

Total cost of revenues 
Gross margin 
Operating expenses: 

Research and development 

Sales and marketing 

General and administrative 

Juniper Networks, Inc. 

Consolidated Statements of Operations 
(In thousands, except per share amounts) 

2010

Years Ended December 31,
2009 

2008

$

3,258,651   

$ 

2,567,992   

$

2,910,960 

834,615   

747,920   

661,416 

4,093,266   

3,315,912   

3,572,376 

1,000,865   

841,722   

867,595 

350,654   

290,987   

269,298 

1,351,519   
2,741,747   

1,132,709   
2,183,203   

1,136,893 
2,435,483 

917,855   

741,708   

731,151 

857,072   

759,131   

812,013 

177,859   

159,459   

144,837 

Amortization of purchased intangible assets 

4,230   

10,416   

43,508 

Litigation settlement charges 

Restructuring charges 

Acquisition-related charges 

Total operating expenses 
Operating income 
Interest and other income, net 
Gain (loss) on equity investments 
Income before income taxes and noncontrolling interest 
Provision for income taxes 
Consolidated net income 

—   

182,331   

9,000 

10,805   

19,463   

6,342   

—   

1,974,163   
767,584   
1,917   
8,653   
778,154   
158,781   
619,373   

1,872,508   
310,695   
6,928   

(5,562 )  

312,061   
196,833   
115,228   

— 

— 

1,740,509 
694,974 
48,749 

(14,832 )

728,891 
217,142 
511,749 

 
 
 
  
  
 
   
 
   
 
   
  
  
 
 
   
    
  
 
 
  
 
 
   
  
 
 
Adjust for net (income) loss attributable to noncontrolling interest

Net income attributable to Juniper Networks

Net income per share attributable to Juniper Networks common stockholders:

Basic 

Diluted 

Shares used in computing net income per share: 

Basic 

Diluted 

(971 )  

1,771   

— 

618,402   

$ 

116,999   

$

511,749 

1.18   

1.15   

$ 

$ 

0.22   

0.22   

$

$

0.96 

0.93 

$

$

$

522,444   

523,603   

530,337 

538,790   

534,015   

551,433 

See accompanying Notes to Consolidated Financial Statements 

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Current assets: 

Cash and cash equivalents 

Short-term investments 

Juniper Networks, Inc. 

Consolidated Balance Sheets 
(In thousands, except par values) 

ASSETS 

December 31,

2010 

2009

$ 

1,811,887   

$

1,604,723 

474,514   

570,522 

Accounts receivable, net of allowance for doubtful accounts of $10,110 for 2010 and $9,116 for 2009

596,622   

458,652 

Deferred tax assets, net 

Prepaid expenses and other current assets 

Total current assets 
Property and equipment, net 
Long-term investments 
Restricted cash 
Purchased intangible assets, net 
Goodwill 
Long-term deferred tax assets, net 
Other long-term assets 

Total assets 

Current liabilities: 

Accounts payable 

Accrued compensation 

Accrued warranty 

Deferred revenue 

Income taxes payable 

Accrued litigation settlements 

161,535   

196,318 

169,812   

48,744 

3,214,370   
493,881   
535,178   
119,346   
121,803   
3,927,807   
—   
55,466   

2,878,959 
455,651 
483,505 
53,732 
13,834 
3,658,602 
10,555 
35,425 

8,467,851   

$

7,590,263 

292,270   

$

242,591 

256,746   

176,551 

35,931   

38,199 

660,264   

571,652 

25,000   

34,936 

—   

169,330 

$ 

$ 

LIABILITIES AND EQUITY 

 
 
 
  
 
   
 
   
  
  
 
    
  
  
    
  
Other accrued liabilities 

Total current liabilities 
Long-term deferred revenue 
Long-term income tax payable 
Other long-term liabilities 
Commitments and contingencies (Note 15) 
Juniper Networks stockholders' equity: 

Preferred stock, $0.00001 par value; 10,000 shares authorized; none issued and outstanding

Common stock, $0.00001 par value, 1,000,000 shares authorized; 525,378 and 519,341 shares issued and 
outstanding at December 31, 2010, and 2009, respectively 

Additional paid-in capital 

Accumulated other comprehensive loss 

Accumulated deficit 

Total Juniper Networks stockholders' equity 
Noncontrolling interest 

Total equity 

Total liabilities and equity 

201,765   

142,526 

1,471,976   
224,165   
103,823   
59,087   

1,375,785 
181,937 
170,245 
37,531 

—   

5    

— 

5 

9,717,783   

9,060,089 

(1,251 )  

(1,433 )

(3,108,337 )  

(3,236,525 )

6,608,200   
600   

5,822,136 
2,629 

6,608,800   

5,824,765 

$ 

8,467,851   

$

7,590,263 

 See accompanying Notes to Consolidated Financial Statements 
59  

 
 
    
  
    
  
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Juniper Networks, Inc. 

Consolidated Statements of Cash Flows 
(In thousands) 

Cash flows from operating activities:  
Consolidated net income 

Adjustments to reconcile consolidated net income to net cash from operating activities:

2010

Years Ended December 31,
2009 

2008

$

619,373   

$ 

115,228 

  $

511,749 

Depreciation and amortization 

Share-based compensation 

Deferred income taxes 

(Gain) loss on equity investments 

Excess tax benefits from share-based compensation 

Other non-cash charges 

Changes in operating assets and liabilities: 

Accounts receivable, net 

Prepaid expenses and other assets 

Accounts payable 

Accrued compensation 

Accrued warranty 

Accrued litigation settlements 

Income taxes payable 

Other accrued liabilities 

Deferred revenue 

155,288   

177,825   

64,035   

(8,653 )  

148,373 

139,659 

9,436 

5,562 

172,453 

108,133 

14,314 

14,832 

(48,500 )  

(3,510 )

(40,182 )

—   

— 

613 

(129,199 )  

(28,682 )

(50,211 )

(129,292 )  

(8,520 )

(539 )

48,217   

(2,422 )

19,770 

78,071   

16,079 

(2,268 )  

(1,891 )

(169,330 )  

169,330   

25,193   

3,681   

43,672 

30,457 

127,894   

163,326 

1,761 

2,640 

— 

49,554 

(6,702 )

76,994 

Net cash provided by operating activities 

812,335   

796,097 

875,179 

 
 
 
  
  
 
   
 
   
 
   
  
  
 
 
    
    
  
 
 
  
 
  
 
 
 
 
 
 
 
 
  
 
  
 
 
 
 
 
 
 
 
 
Cash flows from investing activities:  
Purchases of property and equipment, net 
Purchases of trading investments 
Purchases of available-for-sale investments 
Proceeds from sales of available-for-sale investments 
Proceeds from maturities of available-for-sale investments 
Payments for business acquisitions, net of cash and cash equivalents acquired 
Changes in restricted cash 
Purchases of privately-held equity investments, net 

Net cash used in investing activities 

Cash flows from financing activities:  
Proceeds from issuance of common stock 
Purchases and retirement of common stock 
Excess tax benefits from share-based compensation 
Redemption of convertible debt 
Change in customer financing arrangements 
(Return of capital to) proceeds from noncontrolling interest 

(185,291 )  

(2,754 )  
(1,577,758 )  

537,916   
1,086,514   
(374,765 )  
(12,424 )  

(4,188 )  

(153,101 )

—   

(1,461,532 )

285,379 
398,435 

—   

(11,276 )

(6,205 )

(164,604 )

— 
(474,007 )

130,237 
369,114 
— 
(8,094 )

(2,458 )

(532,750 )  

(948,300 )

(149,812 )

451,039   
(565,473 )  

48,500   
—   

(3,487 )  

(3,000 )  

164,207 
(453,888 )

3,510   
— 
19,613 
4,400 

119,450 
(604,700 )

40,182 

(288 )

22,963 
— 

Net cash used in financing activities 

(72,421 )  

(262,158 )

(422,393 )

Net increase (decrease) in cash and cash equivalents 

207,164   

(414,361 )

302,974 

Cash and cash equivalents at beginning of period 
Cash and cash equivalents at end of period 

Supplemental disclosures of cash flow information:  
Cash paid for interest 
Cash paid for taxes 
Supplemental disclosure of non-cash financing activities:  
Common stock issued in connection with conversion of the senior notes 

1,604,723   
1,811,887   

8,799   
155,700   

—   

$ 

$ 

$ 

2,019,084 
1,604,723 

5,417 
139,969 

  $

  $

1,716,110 
2,019,084 

5,224 
147,999 

— 

  $

399,208 

$

$

$

See accompanying Notes to Consolidated Financial Statements 
60  

 
 
  
 
 
  
 
 
    
  
 
  
 
 
 
 
 
 
 
  
 
 
  
 
 
    
  
 
  
 
 
 
 
 
 
 
 
  
 
 
  
 
 
    
  
 
  
 
    
  
 
  
Table of Contents 

Juniper Networks, Inc. 

Consolidated Statement of Changes in Equity 
(In thousands) 

Juniper Networks 

Shares  

  Amount 

Additional 
Paid-In Capital 

Balance at December 31, 2007 
Consolidated net income 
Change in unrealized loss on investments, net tax of nil 
Change in foreign currency translation adjustment, net tax of nil 
Consolidated comprehensive income 
Issuance of shares in connection with Employee Stock Purchase 
Plan 
Issuance of shares in connection with vesting of restricted share 
units 
Exercise of stock options by employees, net of repurchases 
Issuance of shares in connection with conversion of the 
convertible senior notes 
Exercise of warrants in connection with acquisitions 
Repurchase and retirement of common stock 
Share-based compensation expense 
Adjustment related to tax benefit from employee stock option 
plans 
Balance at December 31, 2008 
Consolidated net income (loss) 
Change in unrealized loss on investments, net tax of nil 
Change in foreign currency translation adjustment, net tax of nil 
Consolidated comprehensive income 
Purchase of subsidiary shares by noncontrolling interest 
Issuance of shares in connection with Employee Stock Purchase 
Plan 
Issuance of shares in connection with vesting of restricted share 
units 
Exercise of stock options by employees, net of repurchases 
Repurchase and retirement of common stock 
Share-based compensation expense 
Adjustment related to tax benefit from employee stock option 
plans 
Balance at December 31, 2009 
Consolidated net income 
Change in unrealized loss on investments, net tax of nil 
Change in foreign currency translation adjustment, net tax of nil 
Consolidated comprehensive income 
Return of capital to noncontrolling interest 
Issuance of shares in connection with Employee Stock Purchase 
Plan 
Issuance of shares in connection with vesting of restricted share 
units 
Exercise of stock options by employees, net of repurchases 

522,815     $
—    
—    
—    
—    
1,590    

1,904    
5,701    
19,822    
8    
(25,088 )  
—    
—    

526,752    
—    
—    
—    
—    
—    
3,221    

1,432    
8,651    
(20,715 )  
—    
—    

519,341    
—    
—    
—    
—    
—    
1,974    

2,224    
21,568    

5    $
—   
—   
—   

—   

—   

—   

—   

—   

—   
—   
—   

—   

5   
—   
—   
—   

—   
—   

—   

—   

—   
—   
—   

—   

5   
—   
—   
—   

—   
—   

—   

—   

—   

8,154,932    $

—   
—   
—   

—   

35,879   

—   

82,608   

399,208   

—   
(427 )  
108,133   

31,164   

8,811,497   
—   
—   
—   

—   
—   

39,164   

—   

126,284   
(6,216 )  
139,659   

(50,299 )  

9,060,089   
—   
—   
—   

—   
—   

41,829   

—   

409,395   

Accumulated 
Other 
Comprehensive 
Income (Loss)

12,251    $
—   
2,547   
(19,043 )  

—   

—   

—   

—   

—   

—   
—   
—   

—   

(4,245 )  
—   
(2,757 )  
5,569   

—   
—   

—   

—   

—   
—   
—   

—   

(1,433 )  
—   
(317 )  
499   

—   
—   

—   

—   

—   

Accumulated 
Deficit  

   Noncontrolling 
Interest  

  Total Equity

(2,813,328 )    $ 
511,749     
—     
—     
—     
—     

—     
—     
—     
—     
(604,273 )   
—     
—     
(2,905,852 )   
116,999     
—     
—     
—     
—     
—     

—     
—     
(447,672 )   
—     
—     
(3,236,525 )   
618,402     
—     
—     
—     
—     
—     

—     
—     

—    $
—   
—   
—   

—   

—   

—   

—   

—   

—   
—   
—   

—   

—   
(1,771 )  
—   
—   

—   
4,400   

—   

—   

—   
—   
—   

—   

2,629   
971   
—   
—   

—   
(3,000 )  

—   

—   

—   

5,353,860 
511,749 
2,547 

(19,043 )

495,253 

35,879 

— 

82,608 

399,208 

— 

(604,700 )

108,133 

31,164 

5,901,405 
115,228 

(2,757 )

5,569 

118,040 
4,400 

39,164 

— 

126,284 

(453,888 )

139,659 

(50,299 )

5,824,765 
619,373 

(317 )

499 

619,555 

(3,000 )

41,829 

— 

409,395 

 
 
 
  
  
 
 
       
     
     
     
       
     
  
     
   
  
 
 
 
Shares assumed in connection with business acquisitions 
Repurchase and retirement of common stock 
Repurchases related to net issuances 
Share-based compensation expense 
Adjustment related to tax benefit from employee stock option 
plans 
Balance at December 31, 2010 

—    
(19,654 )  
(75 )  
—    
—    

—   
—   
—   
—   

—   

2,355   
(75,242 )  
(17 )  
177,825   

101,549   

—   
—   
—   
—   

—   

—     
(488,284 )   
(1,930 )   
—     
—     

—   
—   
—   
—   

—   

2,355 

(563,526 )

(1,947 )

177,825 

101,549 

525,378     $

5    $

9,717,783    $

(1,251 )   $

(3,108,337 )    $ 

600    $

6,608,800 

 See accompanying Notes to Consolidated Financial Statements 
61  

 
 
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Note 1.    Basis of Presentation 

Juniper Networks, Inc. 

Notes to Consolidated Financial Statements 

The consolidated financial statements, which include the Company and its wholly-owned subsidiaries are prepared in accordance with 
U.S. generally accepted accounting principles (“U.S. GAAP”). All inter-company balances and transactions have been eliminated. 

The Company holds a 60 percent interest in a joint venture with Nokia Siemens Networks B.V. (“NSN”). Given the Company's majority 
ownership interest in the joint venture, the accounts of the joint venture have been consolidated with the accounts of the Company, and a 
noncontrolling interest has been recorded for the noncontrolling investor's interests in the net assets and operations of the joint venture. 

Reclassifications 

In the first quarter of 2010, the Company reclassified certain selling and marketing costs that were previously reported as cost of service 
revenues as sales and marketing expense. Accordingly, $25.1 million and $29.1 million of costs reported in the years ended December 
31, 2009, and 2008, respectively, have been reclassified from cost of service revenues to sales and marketing expense to conform to the 
current period's presentation. The reclassification did not impact the Company's previously reported net revenues, segment results, operating 
income, net income, or earnings per share. 

Note 2.    Summary of Significant Accounting Policies 

Use of Estimates 

The preparation of the financial statements and related disclosures in conformity with U.S. GAAP requires the Company to make judgments, 
assumptions, and estimates that affect the amounts reported in the consolidated financial statements and the accompanying notes. The 
Company bases its estimates and assumptions on current facts, historical experience, and various other factors that it believes are reasonable 
under the circumstances, to determine the carrying values of assets and liabilities that are not readily apparent from other sources. To the 
extent there are material differences between our estimates and the actual results, our future consolidated results of operation may be affected. 

Cash and Cash Equivalents 

All highly liquid investments purchased with an original maturity of three months or less are classified as cash and cash equivalents. Cash 
and cash equivalents consist of cash on hand, demand deposits with banks, highly liquid investments in money market funds, commercial 
paper, government securities, certificates of deposit, and corporate debt securities, which are readily convertible into cash. 

Investments in Available-for-Sale and Trading Securities 

Management determines the appropriate classification of securities at the time of purchase and re-evaluates such classification as of each 
balance sheet date. The Company's investments in publicly-traded debt and equity securities are classified as available-for-sale. 
Available-for-sale investments are initially recorded at cost and periodically adjusted to fair value in the consolidated balance sheets. 
Unrealized gains and losses on these investments are reported as a separate component of accumulated other comprehensive income (loss). 
Realized gains and losses and declines in value judged to be other than temporary are determined based on the specific identification method 
and are reported in the consolidated statements of operations. 

The Company recognizes an impairment charge for available-for-sale investments when a decline in the fair value of its investments below 
the cost basis is determined to be other than temporary. The Company considers various factors in determining whether to recognize an 
impairment charge, including the length of time the investment has been in a loss position, the extent to which the fair value has been less 
than the Company's cost basis, the investment's financial condition, and near-term prospects of the investee. If the Company determines that 
the decline in an investment's fair value is other than temporary, the difference is recognized as an impairment loss in its consolidated 
statements of operations. 

The Company's non-qualified compensation plan, which invests in mutual funds are classified as trading securities and reported 

 
 
 
  
  
 
  
  
  
  
  
 
  
  
  
  
  
  
  
  
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Juniper Networks, Inc. 
Notes to Consolidated Financial Statements — (Continued) 
at fair value in the consolidated balance sheets. The realized and unrealized holding gains and losses, as well as the offsetting compensation 
expense, are reported in the consolidated statements of operations. 

Privately-Held Equity Investments 

The Company has minority equity investments in privately-held companies. These investments are included in other long-term assets in the 
consolidated balance sheets and are carried at cost, adjusted for any impairment, as the Company does not have a controlling interest and does 
not have the ability to exercise significant influence over these companies. These investments are inherently high risk as the market for 
technologies or products manufactured by these companies are usually early stage at the time of the investment by the Company and such 
markets may never be significant. The Company monitors these investments for impairment by considering financial, operational, and 
economic data and makes appropriate reductions in carrying values when necessary. Realized gains and losses, if any, are reported in the 
consolidated statements of operations. 

Fair Value Measurement 

The Company records its financial instruments and derivative contracts at fair value. The fair value assumes that the transaction to sell an 
asset or transfer a liability occurs in the principal market for the asset or liability or, in the absence of a principal market, the most 
advantageous market for the asset or liability. The carrying value of the Company's financial instruments including cash and cash equivalents, 
accounts receivable, accrued compensation, and other accrued liabilities, approximates fair market value due to the relatively short period of 
time to maturity. The fair value of investments and derivatives is determined using quoted market prices for those securities or similar 
financial instruments. 

Concentrations 

Financial instruments that subject the Company to concentrations of credit risk consist primarily of cash and cash equivalents, investments, 
and accounts receivable. The Company invests only in high-quality credit instruments and maintains its cash, cash equivalents, 
available-for-sale investments in fixed income securities, and money market funds with high-quality institutions. Deposits held with banks, 
including those held in foreign branches of global banks, may exceed the amount of insurance provided on such deposits. These deposits may 
be redeemed upon demand and, therefore, bear minimal risk. 

Generally, credit risk with respect to accounts receivable is diversified due to the number of entities comprising the Company's customer base 
and their dispersion across different geographic locations throughout the world. The Company performs ongoing credit evaluations of its 
customers and generally does not require collateral on accounts receivable. The Company maintains reserves for potential bad debt and 
historically such losses have been within management's expectations. Verizon Communications, Inc., and AT&T, Inc., accounted for 10.6%, 
and 10.4% of the Company's total net revenues for 2010 and 2009, respectively. As of December 31, 2010 and 2009, we had significant 
accounts receivable for these customers. No single customer accounted for more than 10% of the Company's total net revenues for 2008. 

The Company relies on sole suppliers for certain of its components such as ASICs and custom sheet metal. Additionally, the Company relies 
primarily on a limited number of significant independent contract manufacturers for the production of all of its products. The inability of any 
supplier or manufacturer to fulfill supply requirements of the Company could negatively impact future operating results. 

Property and Equipment 

Property and equipment are recorded at cost less accumulated depreciation. Depreciation is calculated using the straight-line method over the 
lesser of the estimated useful life or the lease term of the respective assets. The Company depreciates leasehold improvements over the lesser 
of the expected life of the lease or the assets, up to a maximum of ten years. The estimated useful life for land improvements is generally ten 
to fifteen years and the estimated useful life for all other depreciable assets is generally one and a half to five years. 

Goodwill and Purchased Intangible Assets 

Goodwill represents the excess purchase price over fair value of net tangible and identifiable intangible assets acquired in a business 
combination. Intangible assets resulting from acquisitions of entities accounted for using the purchase method of accounting are estimated by 
management based upon fair value of the assets received. Identifiable intangible assets are comprised of purchased trademarks, developed 
technologies, customer relationships, maintenance contracts, and other 

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Juniper Networks, Inc. 
Notes to Consolidated Financial Statements — (Continued) 

intangible assets. Goodwill is not subject to amortization but is subject to annual assessment, at a minimum, for impairment by applying 
fair-value based tests. Future goodwill impairment tests could result in a charge to earnings. Purchased intangible assets with finite lives are 
amortized on a straight-line basis over their respective estimated useful lives ranging from two to nineteen years. 

Impairment 

The Company evaluates long-lived assets held for use for impairment whenever events or changes in circumstances indicate that the carrying 
amount of an asset may not be recoverable. An asset is considered impaired if its carrying amount exceeds the future net cash flow the asset is 
expected to generate. If an asset is considered to be impaired, the impairment to be recognized is the amount by which the carrying amount of 
the asset exceeds its fair value. The Company assesses the recoverability of its long-lived and intangible assets by determining whether the 
unamortized balances are greater than the sum of undiscounted future net cash flows of the related assets. The amount of impairment, if any, 
is measured based on projected discounted future net cash flows. 

The Company evaluates goodwill, at a minimum, on an annual basis and whenever events and changes in circumstances indicate that the 
carrying amount of an asset may not be recoverable. Impairment of goodwill is tested at the reporting unit level by comparing the reporting 
unit's carrying value, including goodwill, to the fair value of the reporting unit. The fair values of the reporting units are estimated using a 
combination of the income approach and the market approach. If the carrying value of the reporting unit exceeds its fair value, goodwill is 
considered impaired, and a second step is performed to measure the amount of the impairment loss, if any. The Company conducted its 
annual impairment test as of November 1, 2010, 2009, and 2008, and determined that the carrying value of its remaining goodwill was not 
impaired. Future impairment indicators, including sustained declines in the Company's market capitalization or a decrease in revenue or 
profitability levels, could require impairment charges to be recorded. 

Revenue Recognition 

In October 2009, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2009-13, Topic 
605 - Multiple-Deliverable Revenue Arrangements (“ASU 2009-13”). ASU 2009-13 changes the requirements for establishing separate units 
of accounting in a multiple element arrangement and requires the allocation of arrangement consideration to each deliverable to be based on 
the relative selling price. Under the new standard, the Company allocates the total arrangement consideration to each separable element of an 
arrangement based upon the relative selling price of each element. Arrangement consideration allocated to undelivered elements is deferred 
until delivery. Concurrently with issuing ASU 2009-13, the FASB also issued ASU No. 2009-14, Topic 985 - Certain Revenue Arrangements 
That Include Software Elements (“ASU 2009-14”). ASU 2009-14 excludes software that is contained on a tangible product from the scope of 
software revenue guidance if the software component and the non-software component function together to deliver the tangible products' 
essential functionality. The Company early adopted these standards on a prospective basis as of the beginning of fiscal 2010 for new and 
materially modified arrangements originating after December 31, 2009. 

As a result of the adoption of ASU 2009-13 and ASU 2009-14, net revenue for the year ended December 31, 2010, was approximately $237 
million higher than the net revenue that would have been recorded under the previous accounting rules. The increase in revenue was due to 
recognition of revenue for products shipped during the period which included approximately $183 million in the year ended December 31, 
2010, related to undelivered product commitments for which we were unable to demonstrate fair value pursuant to the previous accounting 
standards. The remainder of the increase in revenue for the year was due to products sold into multiple-year service arrangements which was 
recognized ratably under the previous accounting standards and for the change in our allocation methodology from the residual method to the 
relative selling price method as prescribed by ASU 2009-13. 
Revenue is recognized when all of the following criteria have been met: 

•     

Persuasive evidence of an arrangement exists.  The Company generally relies upon sales contracts or agreements, and customer 
purchase orders to determine the existence of an arrangement.

•     

Delivery has occurred.  The Company uses shipping terms and related documents, or written evidence of customer acceptance, when 
applicable, to verify delivery or performance. 

 
 
  
  
  
  
  
  
  
 
 
  
 
 
  
•     

Sales price is fixed or determinable.  The Company assesses whether the sales price is fixed or determinable based on

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the payment terms and whether the sales price is subject to refund or adjustment. 

Juniper Networks, Inc. 
Notes to Consolidated Financial Statements — (Continued) 

•     

Collectability is reasonably assured.  The Company assesses collectability based on creditworthiness of customers as determined by 
our credit checks and their payment histories. The Company records accounts receivable net of allowance for doubtful accounts, 
estimated customer returns, and pricing credits.

For fiscal 2010 and future periods, pursuant to the guidance of ASU 2009-13, when a sales arrangement contains multiple elements and 
software and non-software components function together to deliver the tangible products' essential functionality, the Company allocates 
revenue to each element based on a selling price hierarchy. The selling price for a deliverable is based on its vendor-specific objective 
evidence (“VSOE”) if available, third-party evidence (“TPE”) if VSOE is not available, or estimated selling price (“ESP”) if neither VSOE 
nor TPE is available. The Company then recognizes revenue on each deliverable in accordance with its policies for product and service 
revenue recognition. VSOE of selling price is based on the price charged when the element is sold separately. In determining VSOE, the 
Company requires that a substantial majority of the selling prices fall within a reasonable range based on historical discounting trends for 
specific products and services. TPE of selling price is established by evaluating largely interchangeable competitor products or services in 
stand-alone sales to similarly situated customers. However, as the Company's products contain a significant element of proprietary 
technology and its solutions offer substantially different features and functionality, the comparable pricing of products with similar 
functionality typically cannot be obtained. Additionally, as the Company is unable to reliably determine what competitors products' selling 
prices are on a stand-alone basis, the Company is not typically able to determine TPE. The best estimate of selling price is established 
considering multiple factors including, but not limited to pricing practices in different geographies and through different sales channels, gross 
margin objectives, internal costs, competitor pricing strategies, and industry technology lifecycles. 

In multiple element arrangements where software deliverables are included, revenue is allocated to each separate unit of accounting for each 
of the non-software deliverables and to the software deliverables as a group using the relative selling prices of each of the deliverables in the 
arrangement based on the aforementioned selling price hierarchy. If the arrangement contains more than one software deliverable, the 
arrangement consideration allocated to the software deliverables as a group is then allocated to each software deliverable using the guidance 
for recognizing software revenue, as amended. 

The Company limits the amount of revenue recognition for delivered elements to the amount that is not contingent on the future delivery of 
products or services, future performance obligation, or subject to customer-specific return or refund privileges. The Company evaluates each 
deliverable in an arrangement to determine whether they represent separate units of accounting. A deliverable constitutes a separate unit of 
accounting when it has stand-alone value and there are no customer-negotiated refunds or return rights for the delivered elements. If the 
arrangement includes a customer-negotiated refund or return right relative to the delivered item, and the delivery and performance of the 
undelivered item is considered probable and substantially in the Company's control, the delivered element constitutes a separate unit of 
accounting. In circumstances when the aforementioned criteria are not met, the deliverable is combined with the undelivered elements, and 
the allocation of the arrangement consideration and revenue recognition is determined for the combined unit as a single unit. Allocation of the 
consideration is determined at arrangement inception on the basis of each unit's relative selling price. The new standards do not generally 
change the units of accounting for the Company's revenue transactions. 

For transactions entered into prior to January 1, 2010, revenue for arrangements with multiple elements, such as sales of products that include 
services, is allocated to each element using the residual method based on the VSOE of fair value of the undelivered items pursuant to 
Accounting Standard Codification ("ASC") Topic 985-605, Software - Revenue Recognition. Under the residual method, the amount of 
revenue allocated to delivered elements equals the total arrangement consideration less the aggregate fair value of any undelivered elements. 
If VSOE of one or more undelivered items does not exist, revenue from the entire arrangement is deferred and recognized at the earlier of: 
(i) delivery of those elements or (ii) when fair value can be established unless maintenance is the only undelivered element, in which case, the 
entire arrangement fee is recognized ratably over the contractual support period. 

The Company accounts for multiple agreements with a single customer as one arrangement if the contractual terms and/or substance of those 
agreements indicate that they may be so closely related that they are, in effect, parts of a single arrangement. 

For sales to direct end-users, value-added resellers, and original equipment manufacturer ("OEM") partners, the Company recognizes product 
revenue upon transfer of title and risk of loss, which is generally upon shipment. It is the Company's practice to identify an end-user prior to 
shipment to a value-added reseller. For the Company's end-users and value-added resellers, there are no significant obligations for future 
performance such as rights of return. The Company's agreements with 

 
 
  
 
 
  
  
  
  
  
  
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Juniper Networks, Inc. 
Notes to Consolidated Financial Statements — (Continued) 

its OEM partners may allow future rights of returns or pricing credits. A portion of the Company's sales is made through distributors under 
agreements allowing for pricing credits or rights of return. Product revenue on sales made through these distributors is recognized upon 
sell-through as reported by the distributors to the Company. Deferred revenue on shipments to distributors reflects the effects of distributor 
pricing credits and the amount of gross margin expected to be realized upon sell-through. Deferred revenue is recorded net of the related 
product costs of revenue. 

The Company records reductions to revenue for estimated product returns and pricing adjustments, such as rebates and price protection, in the 
same period that the related revenue is recorded. The amount of these reductions is based on historical sales returns and price protection 
credits, specific criteria outlined in rebate agreements, and other factors known at the time. 

Service revenues include revenue from maintenance, training, and professional services. Maintenance is offered under renewable contracts. 
Revenue from maintenance service contracts is deferred and recognized ratably over the contractual support period, which is generally one to 
three years. Revenue from training and professional services is recognized as services are completed or ratably over the contractual period, 
which is generally one year or less. 

The Company sells certain interests in accounts receivable on a non-recourse basis as part of customer financing arrangements primarily with 
one major financing company. Cash received under this arrangement in advance of revenue recognition is recorded as short-term debt. 

Allowance for Doubtful Accounts 

The allowance for doubtful accounts is based on the Company's assessment of the collectability of customer accounts. The Company 
regularly reviews its receivables that remain outstanding past their applicable payment terms and establishes allowance and potential 
write-offs by considering factors such as historical experience, credit quality, age of the accounts receivable balances, and current economic 
conditions that may affect a customer's ability to pay. 

Warranty Costs 

The Company generally offers a one-year warranty on all of its hardware products and a 90-day warranty on the media that contains the 
software embedded in the products. Warranty costs are accrued as part of the Company's cost of sales based on associated material costs, 
labor costs for customer support, and overhead at the time revenue is recognized. Material costs are estimated primarily based upon the 
historical costs to repair or replace product returns within the warranty period. Customer support labor and overhead costs are estimated 
primarily based upon historical trends in the cost to support customer cases within the warranty period. 

Contract Manufacturer Liabilities 

The Company outsources most of its manufacturing, repair, and supply chain management operations to its independent contract 
manufacturers, and a significant portion of its cost of revenues consists of payments to them. The independent contract manufacturers 
produce the Company's products using design specifications, quality assurance programs, and standards established by the Company, and 
they procure components and manufacture the products based on the Company's demand forecasts. These forecasts are the Company's 
estimates of future demand for its products, based upon historical trends and analysis from the Company's sales and marketing organizations, 
adjusted for overall market conditions. The Company establishes a provision for inventory, carrying costs, and obsolete material exposures 
for excess components purchased based on historical trends. 

Research and Development 

Costs to research, design, and develop the Company's products are expensed as incurred. Software development costs are capitalized 
beginning when a product's technological feasibility has been established and ending when a product is available for general release to 
customers. Generally, the Company's products are released soon after technological feasibility has been established. As a result, costs 
incurred between achieving technological feasibility and product general availability have not been significant, and all software development 
costs have been expensed as incurred. 

Advertising 

Advertising costs are charged to sales and marketing expense as incurred. Advertising expense was $17.1 million, $11.4 

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Juniper Networks, Inc. 
Notes to Consolidated Financial Statements — (Continued) 

million, and $5.0 million, for 2010, 2009, and 2008, respectively. 

Loss Contingencies 

The Company is subject to the possibility of various loss contingencies arising in the ordinary course of business. Management considers the 
likelihood of loss related to an asset, or the incurrence of a liability, as well as its ability to reasonably estimate the amount of loss, in 
determining loss contingencies. An estimated loss contingency is accrued when it is probable that an asset has been impaired or a liability has 
been incurred and the amount of loss can be reasonably estimated. The Company records a charge equal to the minimum estimated liability or 
a loss contingency only when both of the following conditions are met: (i) information available prior to issuance of the consolidated 
financial statements indicates that it is probable that an asset had been impaired or a liability had been incurred at the date of the financial 
statements, and (ii) the range of loss can be reasonably estimated. The Company regularly evaluates current information available to 
determine whether such accruals should be adjusted and whether new accruals are required. 

Share-Based Compensation 

The Company recognizes share-based compensation expense for all share-based payment awards including employee stock options, restricted 
stock units (“RSUs”), performance share awards ("PSAs"), and purchases under the Company's Employee Stock Purchase Plan ("ESPP") in 
accordance with ASC Topic 718 - Compensation - Stock Compensation ("ASC Topic 718"). Share-based compensation expense for 
expected-to-vest share-based awards is valued under the single-option approach and amortized on a straight-line basis, net of estimated 
forfeitures. The value of the portion of the award that is ultimately expected to vest is recognized as expense over the requisite service periods 
in the Company's consolidated statements of operations for the years ended December 31, 2010, 2009, and 2008. 

The Company utilizes the Black-Scholes-Merton (“BSM”) option-pricing model in order to determine the fair value of stock options. The 
BSM model requires various highly subjective assumptions that represents management's best estimates of volatility, expected option life, 
and risk-free interest rate. The expected volatility is based on the implied volatility of market traded options on our common stock, adjusted 
for other relevant factors including historical volatility of our common stock over the most recent period commensurate with the estimated 
expected life of our stock options. The expected life of an award is based on historical experience, the terms and conditions of the stock 
awards granted to employees, as well as the potential effect from options that have not been exercised at the time. 

Derivatives 

The Company uses derivatives to partially offset its market exposure to fluctuations in certain foreign currencies. The Company does not 
enter into derivatives for speculative or trading purposes. 

The Company uses foreign currency forward contracts to mitigate variability in gains and losses generated from the re-measurement of 
certain monetary assets and liabilities denominated in non-functional currencies. These derivatives are carried at fair value with changes 
recorded in interest and other income, net. Changes in the fair value of these derivatives are largely offset by re-measurement of the 
underlying assets and liabilities. Cash flows from such derivatives are classified as operating activities. These foreign exchange forward 
contracts have maturities of approximately two months. 

The Company also uses foreign currency forward or option contracts to hedge certain forecasted foreign currency transactions relating to 
operating expenses. These derivatives are designated as cash flow hedges and have maturities of less than one year. The effective portion of 
the derivative's gain or loss is initially reported as a component of accumulated other comprehensive income (loss), and upon occurrence of 
the forecasted transaction, is subsequently reclassified into the operating expense line item to which the hedged transaction relates. The 
Company records any ineffectiveness of the hedging instruments, which was immaterial during 2010, 2009, and 2008, in interest and other 
income, net, on its consolidated statements of operations. Cash flows from such hedges are classified as operating activities. 

Provision for Income Taxes 

Deferred tax assets and liabilities are measured using the currently enacted tax rates that apply to taxable income in effect for the years in 
which those tax assets are expected to be realized or settled. The Company regularly assesses the likelihood that its deferred tax assets will be 
realized from recoverable income taxes or recovered from future taxable income based on the realization criteria set forth in ASC Topic - 
Income Taxes (“ASC Topic 740”). To the extent that the Company believes any 

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Juniper Networks, Inc. 
Notes to Consolidated Financial Statements — (Continued) 

amounts are not more likely than not to be realized, the Company records a valuation allowance to reduce its deferred tax assets. The 
Company believes it is more likely than not that future income from the reversal of the deferred tax liabilities and forecasted income will be 
sufficient to fully recover the remaining deferred tax assets. In the event the Company determines that all or part of the net deferred tax assets 
are not realizable in the future, an adjustment to the valuation allowance would be charged to earnings in the period such determination is 
made. Similarly, if the Company subsequently realizes deferred tax assets that were previously determined to be unrealizable, the respective 
valuation allowance would be reversed, resulting in an adjustment to earnings in the period such determination is made. In addition, the 
calculation of tax liabilities involves dealing with uncertainties in the application of complex tax regulations. The Company recognizes 
potential liabilities based on its estimate of whether, and the extent to which, additional taxes will be due. 

Comprehensive Income (loss) 

Comprehensive income (loss) is defined as the change in equity during a period from transactions and other events and circumstances from 
non-owner sources. The Company includes the components of comprehensive income (loss) as part of its consolidated statements of changes 
in equity. Accumulated other comprehensive income (loss) includes net unrealized gains (losses) on available-for-sale securities and net 
foreign currency translation gains (losses), and unrealized gains (losses) on derivatives designated as cash flow hedges that are excluded from 
net income. 

Foreign Currency Translation 

Assets and liabilities of foreign operations with non-U.S. Dollar functional currency are translated to U.S. Dollars using exchange rates in 
effect at the end of the period. Revenue and expenses are translated to U.S. Dollars using weighted-average exchange rates for the period. 
Foreign currency translation gains and losses were not material for the years ended December 31, 2010, 2009, and 2008. The effect of 
exchange rate changes on cash balances held in foreign currencies was immaterial in the years presented. 

Recent Accounting Standards 

In December 2010, the FASB issued ASU No. 2010-29, Topic 805 - Business Combinations: Disclosure of Supplementary Pro Forma 
Information for Business Combinations (“ASU 2010-29”), which provides further comparative disclosure guidance and expands the pro 
forma disclosure requirements under ASC Topic 805. This guidance is effective prospectively for business combinations for which the 
acquisition date is on or after the beginning of the first annual reporting period beginning on or after December 15, 2010. Early adoption is 
permitted. ASU 2010-29 relates to disclosure requirements only and as such does not impact the Company's consolidated results of 
operations or financial condition. 

In December 2010, the FASB issued ASU No. 2010-28, Topic 350 - Intangibles - Goodwill and Other: When to Perform Step 2 of the 
Goodwill Impairment Test for Reporting Units with Zero or Negative Carrying Amounts (“ASU 2010-28”), which modifies Step 1 of the 
goodwill impairment test for reporting units with zero or negative amounts. For those reporting units, an entity is required to perform Step 2 
of the goodwill impairment test if it is more likely than not that a goodwill impairment exist. This guidance is effective for fiscal years, and 
interim periods within those years, beginning after December 15, 2011. The Company's adoption of ASU 2010-28 is not expected to have an 
impact on its consolidated results of operations or financial condition. 

In January 2010, the FASB issued ASU No. 2010-06, Topic 820 - Improving Disclosures about Fair Value Measurements (“ASU 2010-06”), 
which provides additional fair value measurement disclosures and clarifies certain existing disclosure requirements. Except for the 
requirement to disclose purchases, sales, issuances, and settlements of Level 3 measurements on a gross basis, the disclosure and clarification 
requirements are effective for interim and annual reporting periods beginning after December 15, 2009. The requirement to separately 
disclose purchases, sales, issuances, and settlements of recurring Level 3 measurements on a gross basis was effective for fiscal years 
beginning after December 15, 2010, and for interim periods within those fiscal years. ASU 2010-06 relates to disclosure requirements only 
and it did not have an impact on the Company's consolidated results of operations or financial condition. 

Note 3.    Business Combinations 

In the year ended December 31, 2010, the Company completed the acquisitions of Ankeena Networks, Inc., (“Ankeena”), SMobile Systems, 
Inc. (“SMobile”), Altor Networks, Inc. ("Altor"), and Trapeze Networks ("Trapeze"). 

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Ankeena Acquisition 

Juniper Networks, Inc. 
Notes to Consolidated Financial Statements — (Continued) 

On April 19, 2010, the Company acquired 100% of the equity securities of Ankeena, a privately-held provider of new media infrastructure 
technology. The acquisition of Ankeena will provide the Company with strong video delivery capabilities, as Ankeena's products optimize 
web-based video delivery, provide key components of a content delivery network architecture/solution, improve consumers' online video 
experience, and reduce service provider and carrier service provider infrastructure costs for providing web-based video. 

In connection with the acquisition of Ankeena, the Company acquired net assets of $3.6 million, including cash and cash equivalents of $2.3 
million, and recognized goodwill of $53.1 million, which was assigned to the Company's Infrastructure segment. 

Prior to the acquisition, the Company had a $2.0 million, or a 7.7% ownership interest in Ankeena, and accounted for it as a privately-held 
equity investment. As of the acquisition-date, the fair value of the equity interest in Ankeena was $5.2 million based on a noncontrolling 
interest fair value and was included in the purchase price. The Company recognized a $3.2 million gain, which was reported within gain 
(loss) on equity investments in its consolidated statement of operations. 

SMobile Acquisition 

On July 30, 2010, the Company acquired 100% of the equity securities of SMobile, a privately-held software company focused solely on 
smartphone and tablet security solutions for the enterprise, service provider, and consumer markets. The acquisition of SMobile will allow the 
Company to extend its security focus through integration of SMobile's product portfolio with Junos® Pulse. 

In connection with the acquisition of SMobile, the Company assumed net liabilities of $5.2 million, including cash and cash equivalents of 
$0.4 million, and recognized goodwill of $48.1 million, which was assigned to the Company's Service Layer Technology ("SLT") segment. 

Altor Acquisition 

On December 6, 2010, the Company acquired 100% of the equity securities of Altor, a privately-held provider of virtualization security. The 
acquisition of Altor will provide the Company with data center and cloud security solutions, including products that optimize web-based 
video delivery, provide key components of a content delivery network architecture/solution, improve consumers' online video experience, and 
reduce service provider and carrier service provider infrastructure costs for providing web-based video. 

In connection with the acquisition of Altor, the Company acquired net assets of $4.5 million, including cash and cash equivalents of $6.4 
million, and recognized goodwill of $78.2 million, which was assigned to the Company's SLT segment. 

Prior to the acquisition, the Company had a $2.0 million, or a 5.0% ownership interest in Altor, accounted for as a privately-held equity 
investment. As of the acquisition-date, the fair value of the equity interest in Altor was $4.1 million based on a noncontrolling interest fair 
value and was included in the purchase price. The Company recognized a $2.1 million gain, which was reported within gain (loss) on equity 
investments in its consolidated statement of operations. 

Trapeze Acquisition 

On December 16, 2010, the Company acquired 100% of the equity securities of Trapeze, a subsidiary of Belden Inc. and a provider of 
enterprise wireless local area network ("WLAN") solutions. The acquisition will make WLAN infrastructure a key part of Juniper's portfolio 
and accelerate our growth in the enterprise market. 

In connection with the acquisition of Trapeze, the Company acquired net assets of $5.9 million, including cash and cash equivalents of $0.8 
million, and recognized goodwill of $89.8 million, which was assigned to the Company's Infrastructure segment. 

The Company's consolidated financial statements include the operating results of all acquired businesses from the date of each acquisition. 
Pro forma results of operations for these acquisitions have not been presented because the financial impact to the Company's consolidated 
results of operations, both individually and in aggregate, is not material. The Company continues to 

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Juniper Networks, Inc. 
Notes to Consolidated Financial Statements — (Continued) 

evaluate certain balances related to business combinations completed during the 2010. Additional information existing as of the acquisition 
dates but unknown to the Company may become known during the remainder of the measurement period, not to exceed 12 months from the 
acquisition date, which may result in changes to the amounts and allocations recorded. 

Total purchase consideration for these acquisitions is summarized as follows (in millions): 

Net cash 
Assumed stock option and RSU awards allocated to purchase price (1)
Total 
________________________________ 

Ankeena

SMobile

Altor 

Trapeze

Total

$

$

66.5    $
2.4   

68.9    $

69.5    $ 
—   
69.5    $ 

104.0      $ 
—     
104.0      $ 

152.1    $
—   

152.1    $

392.1 
2.4 

394.5 

(1)     The fair value of the stock option and RSU awards assumed was based on the acquired company's determined value on the acquisition date. 

Allocation of the purchase consideration for acquisitions completed during the year ended December 31, 2010, is summarized as follows (in 
millions): 

Net assets acquired (liabilities assumed)
Intangible assets acquired 
Goodwill 
    Total 

Ankeena

SMobile

Altor 

Trapeze

Total

  $

3.6    $

12.2   
53.1   

  $

68.9    $

(5.2 )   $
26.6 
48.1 

69.5 

  $

4.5      $ 
21.3     
78.2     
104.0      $ 

5.9    $

56.4   
89.8   

152.1    $

8.8 
116.5 
269.2 

394.5 

The goodwill recognized is attributable primarily to expected synergies, the acquired assembled workforce, and the economies of scale 
expected from combining the operations of 2010 acquisitions and the Company. Certain amounts of the acquired goodwill is expected to be 
deductible for income tax purposes; however we are unable to estimate the total amount at this time. 

The Company recognized $6.3 million of acquisition-related costs in 2010. These costs were expensed in the period incurred and reported in 
the Company's consolidated statement of operations as acquisition-related and other charges. There were no acquisitions or acquisition 
related charges incurred by the Company in 2009 and 2008. 

The following table presents details of the intangible assets acquired through the business combinations completed during the year ended 
December 31, 2010 (in millions, except years): 

Ankeena 

SMobile

Altor

Trapeze

Estimated 
Useful Life 
(In Years) 

   Amount    

Estimated 
Useful Life 
(In Years)

  Amount   

Estimated 
Useful Life 
(In Years)

  Amount 

Estimated 
Useful Life 
(In Years) 

  Amount 

Total 
Amount 

4.0      $ 

5.2     

5.0    $

24.3   

6.0    $

4.0     

4.0     

—     

—     

—     
—     

3.8     

3.2     

—     

—     

—     
—     

—   

—   

—   

—   

6.0   

2.1   

6.0   

2.0   
—   

0.1   

0.1   
—   

—   

6.0   

—   

—   

—   
—   

8.8     

7.9     

4.6     

—     

—     

—     
—     

5.0     $

45.0    $

83.3 

—    

—    

7.0    

7.0    

—    
2.0    

—   

—   

11.7 

7.8 

8.6   

10.7 

2.6   

—   
0.2   

2.7 

0.1 
0.2 

Existing technology 
In-process research and 
development 
Core technology 
Customer contracts and 
related relationships 
Support agreements and 
related relationships 
Non-compete agreements 
OEM customer contracts 

 
 
  
 
   
     
     
       
     
  
 
 
  
 
  
 
 
  
  
 
     
     
       
       
     
  
 
 
 
  
 
 
 
 
 
  
  
  
  
 
 
       
     
     
   
     
     
       
     
  
  
 
  
   
  
  
 
Total 

   $  12.2       

  $

26.6     

  $

21.3        

  $

56.4    $ 116.5 

Acquired in-process research and development (“IPR&D”) consists of existing research and development projects at the time of the 
acquisition. Projects that qualify as IPR&D assets represent those that have not yet reached technological feasibility and 

70  

 
 
  
  
Table of Contents 

Juniper Networks, Inc. 
Notes to Consolidated Financial Statements — (Continued) 

have no alternative future use. After initial recognition, acquired IPR&D assets are accounted for as indefinite-lived intangible assets. 
Development costs incurred after acquisition on acquired development projects are expensed as incurred. Upon completion of development, 
acquired IPR&D assets are considered amortizable finite-lived assets. As of December 31, 2010, IPR&D related to the Ankeena acquisition 
has completed development and is considered amortizable finite-lived assets. Total IPR&D assets related to the Altor acquisition were $7.9 
million and estimated future cost to complete these IPR&D projects is $1.8 million. 

Note 4. Net Income Per Share 

Basic net income per share is computed by dividing net income available to common stockholders by the weighted average number of 
common shares outstanding for that period. Diluted net income per share is computed giving effect to all dilutive potential common shares 
that were outstanding during the period. Dilutive potential common shares consist of shares issuable upon exercise of stock options, vesting 
of RSUs, and vesting of PSAs. 

The following table presents the calculation of basic and diluted net income per share attributable to Juniper Networks (in millions, except per 
share amounts): 

Numerator: 
Net income attributable to Juniper Networks: 

Denominator: 
Weighted-average shares used to compute basic net income per share
Effect of dilutive securities: 

Years Ended December 31,

2010 

2009

2008

$

618.4      

$ 

117.0   

$

511.7 

522.4     

523.6   

530.3 

Shares issuable upon conversion of the Senior Notes 

—     

—   

8.8 

Employee stock awards 
Weighted-average shares used to compute diluted net income per share

16.4     
538.8     

10.4   

534.0   

12.3 

551.4 

Net income per share attributable to Juniper Networks common stockholders:

Basic 

Diluted 

$

$

1.18      

1.15      

$ 

$ 

0.22   

0.22   

$

$

0.96 

0.93 

The Company excludes outstanding stock options with exercise prices that are greater than the average market price from the calculation of 
diluted net income per share because their effect would be anti-dilutive. The Company includes the common shares underlying PSAs in the 
calculation of diluted net income per share when they become contingently issuable and excludes such shares when they are not contingently 
issuable. Employee stock option awards and PSAs covering approximately 14.0 million and 38.9 million shares of the Company's common 
stock were outstanding but were not included in the computation of diluted earnings per share for the years ended December 31, 2010, and 
2009, respectively, because their effect would have been anti-dilutive. 

71  

 
 
  
 
  
  
  
 
   
   
   
 
   
  
  
  
 
      
    
  
      
    
  
      
    
  
      
    
  
  
  
Table of Contents 

Juniper Networks, Inc. 
Notes to Consolidated Financial Statements — (Continued) 

Note 5.    Cash, Cash Equivalents, and Investments 

Cash and Cash Equivalents 

The following table summarizes the Company's cash and cash equivalents (in millions): 

Cash: 

Demand deposits 

Time deposits 

Total cash 
Cash equivalents: 

U.S. government securities 

Government-sponsored enterprise obligations 

Commercial paper 

Money market funds 

Total cash equivalents 
Total cash and cash equivalents 

As of December 31,

2010

2009

$ 

413.0   

$

427.2 

273.3   

127.9 

686.3   

555.1 

76.7   

5.0   

— 

— 

4.0   

17.0 

1,039.9   

1,032.6 

1,125.6   

1,049.6 

$ 

1,811.9   

$

1,604.7 

Investments in Available-for-Sale and Trading Securities 

The following table summarizes the Company's unrealized gains and losses, and fair value of investments designated as available-for-sale and 
trading securities, as of December 31, 2010, and 2009 (in millions): 

As of December 31, 2010:  
Fixed income securities: 

U.S. government securities 

Amortized Cost

   Gross Unrealized 
Gains

   Gross Unrealized 
Losses 

Estimated Fair 
Value

$

158.2   

$

0.2    

$ 

— 

$

158.4 

Government-sponsored enterprise obligations 

213.8   

0.4    

(0.2 )  

214.0 

 
 
 
  
  
  
 
   
 
   
  
  
 
    
  
    
  
  
  
  
 
   
 
   
 
   
   
   
  
  
    
     
  
 
  
    
     
  
 
  
 
Foreign government debt securities 

Certificate of deposit 

Commercial paper 

Asset-backed securities 

Corporate debt securities 

Total fixed income securities 

Total available-for-sale securities 
Trading securities 

Total 

Reported as: 

Short-term investments 

Long-term investments 

46.8   

20.9   

9.5   

90.1   

459.7   

999.0   

999.0   

8.1   

0.2    

0.1    

—    

—    

2.2    

3.1    

3.1    
—    

— 

— 

— 

(0.1 )  

(0.2 )  

47.0 

21.0 

9.5 

90.0 

461.7 

(0.5 )  

1,001.6 

(0.5 )  

— 

1,001.6 

8.1 

$

$

1,007.1   

$

3.1    

$ 

(0.5 )  

$

1,009.7 

473.6   

$

0.9    

$ 

— 

$

474.5 

533.5   

2.2    

(0.5 )  

535.2 

Total 

$

1,007.1   

$

3.1    

$ 

(0.5 )  

$

1,009.7 

72  

 
 
 
 
 
 
    
     
  
 
  
 
  
Table of Contents 

Juniper Networks, Inc. 
Notes to Consolidated Financial Statements — (Continued) 

As of December 31, 2009:  
Fixed income securities: 

U.S. government securities 

Government-sponsored enterprise obligations 

Foreign government debt securities 

Corporate debt securities 

Total fixed income securities 
Publicly-traded equity securities 

Total available-for-sale securities 
Trading securities 

Total 

Reported as: 

Short-term investments 

Long-term investments 

Amortized Cost

   Gross Unrealized 
Gains

   Gross Unrealized 
Losses 

Estimated Fair 
Value

$

245.0   

$

0.1    

$ 

— 

$

245.1 

212.0   

96.4   

488.2   

1,041.6   
5.4   

1,047.0   

4.7   

0.6    

0.3    

2.0    

3.0    
—    

3.0    
—    

(0.3 )  

(0.1 )  

(0.3 )  

(0.7 )  
— 

(0.7 )  

— 

212.3 

96.6 

489.9 

1,043.9 
5.4 

1,049.3 

4.7 

$

$

1,051.7   

$

3.0    

$ 

(0.7 )  

$

1,054.0 

569.5   

$

1.0    

$ 

— 

$

570.5 

482.2   

2.0    

(0.7 )  

483.5 

Total 

$

1,051.7   

$

3.0    

$ 

(0.7 )  

$

1,054.0 

The following table presents the maturities of the Company's available-for-sale and trading securities, as of December 31, 2010, and 2009 (in 
millions): 

As of December 31, 2010:  
Due within one year 
Due between one and five years 
No contractual maturity 

Amortized Cost

Gross Unrealized 
Gains

   Gross Unrealized 
Losses 

Estimated Fair 
Value

$

$

465.5   
533.5   
8.1   

$ 

0.9    
2.2    
—    

$

— 
(0.5 )  
— 

466.4 
535.2 
8.1 

Total 

$

1,007.1   

$

3.1    

$ 

(0.5 )  

$

1,009.7 

As of December 31, 2009:  
Due within one year 

Amortized Cost

Gross Unrealized 
Gains

   Gross Unrealized 
Losses 

Estimated Fair 
Value

$

559.4   

$

1.0    

$ 

— 

$

560.4 

 
 
 
   
 
   
 
   
   
   
  
  
    
 
  
  
 
 
    
 
  
  
 
 
 
 
 
    
     
  
 
  
 
  
  
 
   
 
   
 
   
   
   
  
  
  
    
     
  
 
  
 
 
  
 
   
 
   
 
   
   
   
  
  
  
    
     
  
 
  
 
Due between one and five years 
No contractual maturity 

482.2   
10.1   

2.0    
—    

(0.7 )  
— 

483.5 
10.1 

Total 

$

1,051.7   

$

3.0    

$ 

(0.7 )  

$

1,054.0 

73  

 
 
 
  
Table of Contents 

Juniper Networks, Inc. 
Notes to Consolidated Financial Statements — (Continued) 

The following tables presents the Company's available-for-sale investments that are in an unrealized loss position as of December 31, 2010 
and 2009 (in millions): 

As of December 31, 2010 
Corporate debt securities (1) 
Government-sponsored enterprise obligations 
Foreign government debt securities (1) 
Commercial paper 
Asset-backed securities 
Total 
 ________________________________ 

Less than 12 Months 

12 Months or Greater  

Total 

Fair Value  

Unrealized 
Loss 

Fair Value  

Unrealized 
Loss  

   Fair Value  

Unrealized 
Loss 

$ 

$ 

104.3    $
57.8   
—   
5.0   
54.7   

221.8    $

(0.2 )   $
(0.2 )  
— 
— 
(0.1 )  

(0.5 )   $

28.8    $
—   
6.2   
—   
—   

35.0    $

—      $ 
—     
—     
—     
—     
—      $ 

133.1    $
57.8   
6.2   
5.0   
54.7   

256.8    $

(0.2 )
(0.2 )
— 
— 
(0.1 )

(0.5 )

(1)     Balance includes investments that were in an immaterial unrealized loss position 12 months or greater as of December 31, 2010. 

As of December 31, 2009 
Corporate debt securities 
Government-sponsored enterprise obligations 
Other investments (1) 
Total 
________________________________ 

(1)     Other investments consist of U.S. and foreign government securities.

Less than 12 Months 

Total 

Fair Value 

Unrealized Loss  

      Fair Value 

Unrealized Loss 

$

$

157.7    $
38.9   
126.2   

322.8    $

(0.3 )       $ 
(0.3 )      
(0.1 )      
0.7         $ 

157.7    $
38.9   
126.2   

322.8    $

(0.3 )
(0.3 )
(0.1 )

0.7 

The Company had no investments in publicly-traded equity securities as of December 31, 2010. The Company had no impairment charges to 
its publicly-traded equity investments in 2009 and in 2008, the Company realized an impairment charge of $3.5 million on a publicly-traded 
equity security due to a sustained decline in the fair value of the investment below its cost basis that the Company judged to be other than 
temporary. There were no material realized gains or losses from the sale of available-for-sale securities in 2010, 2009, and 2008. The 
Company generated cash proceeds of $1,624.4 million, $683.8 million, and $499.4 million from maturities and sales of our available-for-sale 
investments during 2010, 2009, and 2008, respectively. 

The Company had 73 and 52 investments that were in an unrealized loss position as of December 31, 2010, and 2009, respectively. The gross 
unrealized losses related to these investments were due to changes in interest rates. The contractual terms of these investments do not permit 
the issuer to settle the securities at a price less than the amortized cost of the investment. For fixed income securities that have unrealized 
losses, the Company has determined that (i) it does not have the intent to sell any of these investments, and (ii) it is not more likely than not 
that it will be required to sell any of these investments before recovery of the entire amortized cost basis. The Company did not consider these 
investments to be other than temporarily impaired as of December 31, 2010, and December 31, 2009, respectively. The Company reviews its 
investments to identify and evaluate investments that have an indication of possible impairment. The Company aggregates its investments by 
category and length of time the securities have been in a continuous unrealized loss position to facilitate its evaluation. 

Privately-Held Equity Investments 

The Company's minority equity investments in privately-held companies are carried at cost, as the Company does not have a controlling 
interest or the ability to exercise significant influence over these companies. The Company adjusts its privately-held equity investments for 
any impairment if the fair value exceeds the carrying value of the respective assets. 

 
 
  
 
   
     
       
     
       
     
 
  
 
  
  
 
 
 
 
  
   
   
   
     
   
 
 
 
 
  
 
   
     
         
     
 
  
     
  
 
 
 
   
        
   
 
 
  
  
  
  
  
As of December 31, 2010, and 2009, the carrying values of the Company's privately-held equity investments of $22.1 million and $13.9 
million, respectively, were included in other long-term assets in the consolidated balance sheets. In 2010, 2009, and 2008, the Company 
invested a total of $13.3 million, $7.2 million, and $4.6 million, respectively, in privately-held equity 

74  

 
 
Table of Contents 

Juniper Networks, Inc. 
Notes to Consolidated Financial Statements — (Continued) 
investments. In 2010, as a result of the acquisitions of Ankeena and Altor, the Company recognized a gain of $3.2 million and $2.1 million, 
respectively, from its minority equity investments in those companies. In 2009, the Company had a minority equity investment in a 
privately-held company that was acquired by a publicly-traded company for which the Company received a cash payment of $1.0 million and 
common stock of the acquiring company of $1.0 million, which is classified as an available-for-sale investment. Additionally, the Company 
had a minority equity investment in a privately-held company that was acquired by a third party for which the Company received a payment 
of $2.1 million in 2008 and $0.3 million in 2009. 

The Company measures the fair value of privately-held equity investments using an analysis of the financial condition and near-term 
prospects of the investees, including recent financing activities and their capital structure. In 2010, the Company determined there were no 
impairments to its privately-held equity investments. During the years ended December 31, 2009, and 2008, the Company recognized an 
impairment loss of $5.5 million and $11.3 million, respectively, on its minority equity investments in privately-held companies determined to 
be other than temporary. 

Restricted Cash 

Restricted cash consists of: (i) amounts held in escrow accounts, as required by certain acquisitions completed in 2005 and 2010; (ii) the India 
Gratuity Trust and Israel Retirement Trust, which cover statutory severance obligations in the event of termination of the Company's India 
and Israel employees, respectively; and (iii) the Directors and Officers ("D&O") indemnification trust. 

In 2010, the Company increased its restricted cash by $261.9 million, primarily for the escrow accounts required by the acquisitions 
completed in 2010, and to a lesser extent for the Israel Retirement Trust established in the first quarter of 2010. The increases in restricted 
cash were partially offset by distributions of approximately $196.5 million, mainly related to the 2010 acquisitions. 

In connection with the Ankeena acquisition, the Company agreed to pay $10.7 million from escrow, which represents the cash value of 
unvested restricted shares in Ankeena as of April 8, 2010, to certain former Ankeena employees. As of December 31, 2010, the Company 
expects to release $6.1 million from escrow as these restricted shares vest over the next two years. 

In 2009, the Company distributed $1.0 million of its restricted cash in connection with the escrow fund associated with the acquisition of 
Funk Software. The Company also increased its restricted cash by an aggregate of $11.3 million in 2009 to fund both its India Gratuity and 
D&O Trusts due to overall growth of the Company. 

The following table summarizes the Company's restricted cash as reported in the consolidated balance sheets (in millions): 

Restricted cash: 

Demand deposits 

Total restricted cash 
Restricted investments: 

U.S. government securities 

Corporate debt securities 

Money market funds 

As of December 31,

2010

2009

$ 

1.7   

$

3.8 

1.7   

3.8 

0.6   

19.8 

2.7   

— 

114.3   

30.1 

 
 
  
  
  
  
  
  
  
  
 
   
 
   
 
 
 
    
  
  
 
 
Total restricted investments 
Total restricted cash and investments 

117.6   

$ 

119.3   

$

49.9 

53.7 

As of December 31, 2010, and 2009, the unrealized gain and losses related to restricted investments were immaterial. 

75  

 
 
  
  
Table of Contents 

Note 6.    Fair Value Measurements 

Fair Value Hierarchy 

Juniper Networks, Inc. 
Notes to Consolidated Financial Statements — (Continued) 

The Company determines the fair values of its financial instruments based on the fair value hierarchy, which requires an entity to maximize 
the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. Fair value is defined as the price that 
would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. 
The fair value assumes that the transaction to sell the asset or transfer the liability occurs in the principal or most advantageous market for the 
asset or liability and establishes that the fair value of an asset or liability shall be determined based on the assumptions that market 
participants would use in pricing the asset or liability. The classification of a financial asset or liability within the hierarchy is based upon the 
lowest level input that is significant to the fair value measurement. The fair value hierarchy prioritizes the inputs into three levels that may be 
used to measure fair value: 

Level 1 - Inputs are unadjusted quoted prices in active markets for identical assets or liabilities. 

Level 2 - Inputs are quoted prices for similar assets and liabilities in active markets or inputs that are observable for the asset or liability, 
either directly or indirectly through market corroboration, for substantially the full term of the financial instrument. These inputs are valued 
using market based approaches. 

Level 3 - Inputs are unobservable inputs based on the Company's assumptions. These inputs, if any, are valued using internal financial 
models. 

Assets and Liabilities Measured at Fair Value on a Recurring Basis 

The following tables provide a summary of assets measured at fair value on a recurring basis and their presentation on the Company’s 
consolidated balance sheets (in millions): 

Available-for-sale debt securities: 

(Level 1)

(Level 2)

Fair Value Measurements at December 31, 2010 Using 
Significant Other 
Observable Remaining 
Inputs

Quoted Prices in 
Active Markets For 
Identical Assets

Significant Other 
Unobservable 
Remaining Inputs 
(Level 3) 

U.S. government securities (1) 

$ 

54.9    $

180.8    $

—    $

Government-sponsored enterprise obligations 

Foreign government debt securities 

Commercial paper 

Corporate debt securities (2) 

Certificate of deposit 

Asset-backed securities 

Money market funds (3) 

208.9   

21.0   

—   

2.7   

—   

—   

1,154.2   

10.1   

26.0   

13.5   

461.7   

21.0   

90.0   

—   

Total available-for-sale debt securities 

1,441.7   

803.1   

—   

—   

—   

—   

—   

—   

—   

—   

Total

235.7 

219.0 

47.0 

13.5 

464.4 

21.0 

90.0 

1,154.2 

2,244.8 

 
 
 
  
  
  
  
  
  
  
  
 
   
 
   
 
   
   
   
  
 
 
  
  
  
     
  
 
 
 
  
 
 
 
 
 
 
Total available-for-sale securities 

1,441.7   

803.1   

—   

2,244.8 

Trading securities: 

Mutual funds 

Total trading securities 

Derivative assets: 

Foreign exchange contracts 

Total derivative assets 

Total assets measured at fair value 
________________________________ 

8.1   

—   

—   

8.1    $

—    $

—    $

—   

—   

0.4   

0.4   

—   

—   

8.1 

8.1 

0.4 

0.4 

1,449.8    $

803.5    $

—    $

2,253.3 

$ 

$ 

(1)     

Balance includes $0.6 million of restricted investments measured at fair market value, related to an acquisition completed in 2005. For additional information regarding the 
Company's restricted investments, see Note 5, Cash, Cash Equivalents, and Investments, under the heading “Restricted Cash.” Restricted investments are included in the 
restricted cash balance in the consolidated balance sheet. 

76  

 
 
  
 
 
 
 
 
 
  
 
 
 
 
 
 
  
 
 
Table of Contents 

Juniper Networks, Inc. 
Notes to Consolidated Financial Statements — (Continued) 

(2)     Balance includes $2.7 million of restricted investments measured at fair market value, related to the Company's India Gratuity Trust. 

(3)     Balance includes $114.3 million of restricted investments measured at fair market value, related to the Company's D&O trust. 

Fair Value Measurements at December 31, 2010 Using 
Significant Other 
Observable Remaining 
Inputs

Quoted Prices in 
Active Markets For 
Identical Assets

Significant Other 
Unobservable 
Remaining Inputs 
(Level 3) 

(Level 1)

(Level 2)

Total

Reported as: 

Cash equivalents 

Short-term investments 

Long-term investments 

Restricted cash 
  Prepaid expenses and other current assets 

Total assets measured at fair value 

$ 

$ 

1,039.9    $

85.7    $

—    $

1,125.6 

150.7   

142.2   

117.0   
—   

323.8   

393.0   

0.6   
0.4   

—   

—   

—   
—   

474.5 

535.2 

117.6 
0.4 

1,449.8    $

803.5    $

—    $

2,253.3 

Fair Value Measurements at December 31, 2009 Using 
Significant Other 
Observable Remaining 
Inputs

Quoted Prices in 
Active Markets For 
Identical Assets

Significant Other 
Unobservable 
Remaining Inputs 
(Level 3) 

(Level 1)

(Level 2)

Total

Reported as: 

Cash equivalents 

Short-term investments 

Long-term investments 

Restricted cash 
  Prepaid expenses and other current assets 

Total assets measured at fair value 

$ 

$ 

1,032.6    $

17.0    $

—    $

1,049.6 

101.3   

181.2   

49.9   
—   

469.2   

302.3   

—   
0.2   

—   

—   

—   
—   

570.5 

483.5 

49.9 
0.2 

1,365.0    $

788.7    $

—    $

2,153.7 

As of December 31, 2010, and 2009, the Company had $2.6 million and $1.5 million, respectively, of derivative liabilities measured at fair 
value on a recurring basis. The Company recorded the derivative liabilities, which related to its foreign exchange contracts, within other 
accrued liabilities in its consolidated balance sheets. These liabilities were measured using significant other observable remaining inputs 
(Level 2) pursuant to the fair value hierarchy. 

The Company's policy is to recognize asset or liability transfers among Level 1, Level 2, and Level 3 as of the actual date of the events or 
change in circumstances that caused the transfer. During the years ended December 31, 2010, and 2009, the Company had no transfers 
between levels of the fair value hierarchy of its assets or liabilities measured at fair value. 

Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis 

 
 
 
 
 
 
  
 
   
 
   
 
   
   
   
  
 
 
  
  
  
     
  
 
 
 
  
 
 
 
 
 
 
  
 
   
 
   
 
   
   
   
  
 
 
  
  
  
     
  
 
 
 
  
 
 
 
 
 
 
  
  
  
  
The Company's assets are measured at fair value on a nonrecurring basis at least annually or on a quarterly basis if impairment is indicated. 
As of December 31, 2010, and December 31, 2009, the carrying value of privately-held equity investments measured at fair value on a 
nonrecurring basis was $0.8 million and $0.5 million, respectively. These privately-held equity investments, which are normally carried at 
cost, were measured at fair value due to events and circumstances that the Company identified as significantly impacting the fair value of the 
investments. The Company measured the fair value of its privately-held equity investments using an analysis of the financial condition and 
near-term prospects of the investee, including recent financing activities and their capital structure. As a result, the Company recognized an 
impairment loss of $5.5 million in the year ended December 31, 2009, and classified the investments as Level 3 assets due to the absence of 
quoted market prices and inherent lack of liquidity. The Company had no impairment charges against its privately-held equity investments in 
the year ended December 31, 2010.  

The Company had no liabilities that were measured at fair value on a nonrecurring basis during the years ended December 31, 2010, and 
2009. 

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Table of Contents 

Juniper Networks, Inc. 
Notes to Consolidated Financial Statements — (Continued) 

Note 7. Goodwill and Purchased Intangible Assets 

Goodwill 

The changes in the carrying amount of goodwill during the two years ended December 31, 2010, are as follows (in millions): 

Balance as of January 1, 2009 

Goodwill 

Accumulated impairment losses 
Carrying value at January 1, 2009 
Balance as of December 31, 2009 

Goodwill 

Accumulated impairment losses 
Carrying value at December 31, 2009 
Balance as of January 1, 2010 

Goodwill 

Accumulated impairment losses 
Carrying value at January 1, 2010 
Adjustment to goodwill 
Goodwill acquired during the twelve months ended December 31, 2010
Balance as of December 31, 2010 

Infrastructure

SLT 

Total

$

1,500.5     $ 

3,438.1 

  $

4,938.6 

—    
1,500.5    

(1,280.0 )  

2,158.1 

(1,280.0 )

3,658.6 

1,500.5    

3,438.1 

4,938.6 

—    
1,500.5    

(1,280.0 )  

2,158.1 

(1,280.0 )

3,658.6 

1,500.5    

3,438.1 

4,938.6 

—    
1,500.5    
—    
142.9    

(1,280.0 )  

2,158.1 

0.2 
126.1 

(1,280.0 )

3,658.6 

0.2 
269.0 

Goodwill 

Accumulated impairment losses 
Carrying value at December 31, 2010 

1,643.4    

3,564.4 

5,207.8 

—    
1,643.4     $ 

(1,280.0 )  

2,284.4 

  $

(1,280.0 )

3,927.8 

$

During the year ended December 31, 2010, the Company recorded goodwill of $53.1 million, $48.1 million, $78.2 million, and $89.8 million 
as a result of its acquisitions of Ankeena, SMobile, Altor, and Trapeze, respectively. For further discussion, see Note 3, Business 
Combinations. The Company performed goodwill impairment reviews as of November 1, 2010, and 2009, and concluded that there was no 
impairment to goodwill during the years ended December 31, 2010 and 2009. 

78  

 
 
  
 
  
  
  
 
   
 
   
   
   
 
  
  
 
 
     
 
 
 
 
     
 
 
 
 
 
     
 
 
 
 
 
 
 
     
 
 
 
  
  
Table of Contents 

Purchased Intangible Assets 

Juniper Networks, Inc. 
Notes to Consolidated Financial Statements — (Continued) 

The following table presents the Company's purchased intangible assets (in millions): 

Gross  

Accumulated 
Amortization 

Additions 

Net  

As of December 31, 2010:  
Intangible assets with definite lives: 

Technologies and patents 

$

380.0   

$

(381.4 )   

$ 

91.1   

$

Other 

Total intangible assets with definite lives 
IPR&D with indefinite lives 

68.9   

448.9   
—   

(62.2 )   

(443.6 )   
— 

17.5   

108.6   
7.9   

89.7 

24.2 

113.9 
7.9 

Total 

As of December 31, 2009:  
Technologies and patents 
Other 

Total 

$

$

$

448.9   

$

(443.6 )   

$ 

116.5   

$

121.8 

380.0   
68.9   

$

(376.0 )   
(59.1 )   

$ 

$

—   
—   

4.0 
9.8 

448.9   

$

(435.1 )   

$ 

—   

$

13.8 

During the year ended December 31, 2010, the Company recorded $12.2 million, $26.6 million, $21.3 million, and $56.4 million of 
purchased intangible assets as a result of its acquisitions of Ankeena, SMobile, Altor and Trapeze. For further discussion, see Note 3, 
Business Combinations. 

Amortization of purchased intangible assets included in operating expenses and cost of product revenues totaled $8.6 million and $15.4 
million in 2010 and 2009, respectively. The Company determined that there was no impairment of its intangible assets as of December 31, 
2010 and 2009. 

The estimated future amortization expense of purchased intangible assets with definite lives for future periods is as follows (in millions): 

Years Ending December 31,  
2011 
2012 
2013 
2014 
2015 
Thereafter 

Total 

79  

$

Amount 

23.3 
22.5 
22.3 
20.4 
16.6 
8.8 

$

113.9 

 
 
  
  
 
   
 
   
   
   
 
   
  
  
  
  
    
  
  
    
  
 
 
 
  
  
 
 
  
  
 
 
 
  
  
 
 
    
  
  
    
  
  
  
  
  
 
   
  
Table of Contents 

Juniper Networks, Inc. 
Notes to Consolidated Financial Statements — (Continued) 

Note 8.    Other Financial Information 

Property and Equipment 

Property and equipment consist of the following (in millions): 

Computers and equipment 
Software 
Leasehold improvements 
Furniture and fixtures 
Land and land improvements 

Property and equipment, gross 
Accumulated depreciation 

Property and equipment, net 

$ 

As of December 31,

2010

2009

$

530.1 
117.8 
178.1 
24.9 
214.5 

1,065.4 
(571.5 )  

435.6 
105.0 
158.8 
21.6 
201.6 

922.6 
(466.9 )

$ 

493.9 

$

455.7 

Depreciation expense was $146.8 million, $133.0 million, and $123.5 million in 2010, 2009, and 2008, respectively. 

Deferred Revenue 

Amounts billed in excess of revenue recognized are included as deferred revenue in the accompanying consolidated balance sheets. Product 
deferred revenue, net of the related deferred cost of revenue, includes shipments to end-users, value-added resellers, and distributors. The 
following table provides a breakdown of the Company's deferred revenue (in millions): 

Deferred product revenue: 

Undelivered product commitments and other product deferrals

$

294.1 

  $

As of December 31,

2010 

2009

Distributor inventory and other sell-through items 

Deferred gross product revenue 

Deferred cost of product revenue 

Deferred product revenue, net 
Deferred service revenue 

Total 

Reported as: 

Current 

143.4  

437.5  

254.7 

136.6 

391.3 

(148.8 )  

(150.0 )

288.7  
595.7  

884.4 

  $

241.3 
512.3 

753.6 

660.2 

  $

571.7 

$

$

 
 
 
  
  
  
 
   
   
   
 
  
  
 
 
 
 
 
 
 
 
  
  
  
  
 
   
   
   
 
  
  
 
 
 
 
 
 
 
 
 
 
 
Long-term 

Total 

224.2  

$

884.4 

  $

181.9 

753.6 

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Warranties 

Juniper Networks, Inc. 
Notes to Consolidated Financial Statements — (Continued) 

The Company provides for the estimated cost of product warranties at the time revenue is recognized. This provision is reported as accrued 
warranty within current liabilities on its consolidated balance sheets. Changes in the Company's accrued warranty are as follows (in millions): 

Beginning balance 

Provisions made during the period, net 

Change in estimate 

Actual costs incurred during the period 
Ending balance 

Restructuring Liabilities 

As of December 31,

2010

2009

$ 

38.2 

$

40.1 

49.9 

(3.0 )  

(49.2 )  

$ 

35.9 

$

46.9 

(5.6 )

(43.2 )

38.2 

During 2009, the Company implemented a restructuring plan (the “2009 Restructuring Plan”) in an effort to better align its business 
operations with the current market and macroeconomic conditions. The restructuring plan included restructuring of certain business functions 
that resulted in reductions of workforce and facilities. The Company recorded $10.8 million and $19.5 million in restructuring charges during 
the years ended December 31, 2010, and 2009, respectively, associated with the 2009 Restructuring Plan. The Company incurred no 
restructuring charges in the year ended December 31, 2008. 

Restructuring charges were based on the Company's restructuring plans that were committed to by management. Any changes in the 
estimates of executing the approved plans will be reflected in the Company's results of operations. The following tables illustrate changes in 
the restructuring liabilities during 2010 and 2009, respectively (in millions): 

Liability as of 
December 31, 
2009

Charges  

   Cash Payments  

Adjustment  

Liability as of 
December 31, 
2010

Facilities 
Severance, contractual commitments, and other 
charges 
Total restructuring charges 

$ 

$ 

4.9   

$

6.9   

$

(2.5 )   

$ 

(1.6 )  

$

4.5    

3.9    

(5.5 )   

(2.7 )   

9.4   

$

10.8   

$

(8.0 )   

$ 

(4.3 )  

$

7.7 

0.2 

7.9 

Liability as of 
December 31, 
2008

Charges  

   Cash Payments  

Adjustment  

Liability as of 
December 31, 
2009

Facilities 
Severance, contractual commitments, and other 
charges 
Total restructuring charges 

$ 

$ 

—   

$

7.2   

$

(0.8 )   

$ 

(1.5 )  

$

—    

12.3    

(7.5 )   

(0.3 )   

—   

$

19.5   

$

(8.3 )   

$ 

(1.8 )  

$

4.9 

4.5 

9.4 

Interest and Other Income, Net 

Interest and other income, net, consists of the following (in millions): 

 
 
  
  
 
   
   
   
 
  
  
 
 
 
 
  
  
  
  
 
   
 
   
 
   
   
   
   
   
  
  
  
  
  
 
   
 
   
 
   
   
   
   
   
  
  
  
  
  
  
  
Interest income and expense, net 
Other income and expense, net 

Total interest and other income, net 

Years Ended December 31,

2010 

2009

2008

$ 

1.8     
0.1     

$

5.8   
1.1   

49.6 
(0.9 )

1.9     

$ 

6.9   

$

48.7 

$

$

Interest income and expense, net, primarily includes interest income from the Company's cash, cash equivalents, and 

81  

 
 
 
   
   
   
 
   
 
  
  
  
 
  
Table of Contents 

Juniper Networks, Inc. 
Notes to Consolidated Financial Statements — (Continued) 
investments, as well as customer financing charges. Other income and expense, net, primarily includes foreign exchange gains and losses and 
other miscellaneous expenses such as bank fees. 

Note 9.    Financing Arrangements 

The Company has customer financing arrangements to sell its accounts receivable to a major third-party financing provider. The program 
does not and is not intended to affect the timing of revenue recognition because the Company only recognizes revenue upon sell-through. 
Under the financing arrangements, proceeds from the financing provider are due to the Company 30 days from the sale of the receivable. In 
these transactions with the financing provider, the Company has surrendered control over the transferred assets. The accounts receivable have 
been isolated from the Company and put beyond the reach of creditors, even in the event of bankruptcy. The Company does not maintain 
effective control over the transferred assets through obligations or rights to redeem, transfer, or repurchase the receivables after they have 
been transferred. 

Pursuant to the financing arrangements for the sale of receivables, the Company sold net receivables of $637.5 million and $449.8 million in 
2010 and 2009, respectively. In 2010 and 2009, the Company received cash proceeds of $595.7 million and $426.3 million, respectively. The 
amounts owed by the financing provider recorded as accounts receivable on the Company's consolidated balance sheets as of December 31, 
2010, and December 31, 2009, were $127.4 million and $89.8 million, respectively. 

The portion of the financed receivable that has not been recognized as revenue is accounted for as a financing arrangement and is included in 
other accrued liabilities in the consolidated balance sheet. As of December 31, 2010, and December 31, 2009, the estimated amounts of cash 
received from the financing provider that has not been recognized as revenue from its distributors was $49.1 million and $52.6 million, 
respectively. 

Note 10.    Derivative Instruments 

The Company uses derivatives to partially offset its market exposure to fluctuations in certain foreign currencies and does not enter into 
derivatives for speculative or trading purposes. 

The notional amount of Company's foreign currency derivatives are summarized as follows (in millions): 

Cash flow hedges 
Non-designated hedges 
     Total 

Cash Flow Hedges 

As of December 31,

2010

2009

$ 

$ 

110.4   
74.4   

184.8   

$

$

59.4 
54.7 

114.1 

The Company uses foreign currency forward or option contracts to hedge certain forecasted foreign currency transactions relating to cost of 
services and operating expenses. The derivatives are intended to protect the U.S. Dollar equivalent of the Company's planned cost of services 
and operating expenses denominated in foreign currencies. These derivatives are designated as cash flow hedges. Execution of these cash 
flow hedge derivatives typically occurs every month with maturities of less than one year. The effective portion of the derivative's gain or 
loss is initially reported as a component of accumulated other comprehensive income (loss), and upon occurrence of the forecasted 
transaction, is subsequently reclassified into the cost of services or operating expense line item to which the hedged transaction relates. The 
Company records any ineffectiveness of the hedging instruments in interest and other income, net in its consolidated statements of operations. 
Cash flows from such hedges are classified as operating activities. All amounts within other comprehensive income (loss) are expected to be 
reclassified into earnings within the next 12 months. 

The total fair value of the Company’s derivative assets located in other current assets in the consolidated balance sheets as of December 31, 

 
 
  
 
  
  
  
  
 
  
  
  
 
   
 
   
  
  
 
  
    
  
  
  
  
2010, and 2009, was $0.4 million and $0.2 million, respectively. The total fair value of the Company’s derivative liabilities located in other 
accrued liabilities in the consolidated balance sheets as of December 31, 2010, and 2009, was $2.6 million and $1.5 million, respectively. 

82  

 
 
Table of Contents 

Juniper Networks, Inc. 
Notes to Consolidated Financial Statements — (Continued) 

During the year ended December 31, 2010, the Company recognized a loss of $3.0 million in accumulated other comprehensive income for 
the effective portion of its derivative instruments and reclassified a loss of $2.1 million from other comprehensive income to operating 
expense in the consolidated statements of operations. The Company recognized a gain of $0.6 million in accumulated other comprehensive 
income for the effective portion of its derivative instruments and reclassified a gain of $4.2 million from other comprehensive income to 
operating expense in the consolidated statements of operations during the year ended December 31, 2009. 

The ineffective portion of the Company's hedging instruments recognized in its consolidated statements of operations was immaterial during 
the three years ended December 31, 2010. 

Non-Designated Hedges 

The Company also uses foreign currency forward contracts to mitigate variability in gains and losses generated from the re-measurement of 
certain monetary assets and liabilities denominated in foreign currencies. These hedges do not qualify for special hedge accounting treatment. 
These derivatives are carried at fair value with changes recorded in interest and other income, net. Changes in the fair value of these 
derivatives are largely offset by re-measurement of the underlying assets and liabilities. Cash flows from such derivatives are classified as 
operating activities. The derivatives have maturities of approximately two months. 

The Company recognized a loss of $0.3 million and a gain of $4.9 million on non-designated derivative instruments within interest and other 
income, net, in its consolidated statements of operations during the years ended December 31, 2010, and 2009, respectively. 

Note 11.    Equity 

Stock Repurchase Activities 

In February 2010, the Company’s Board of Directors (the “Board”) approved a new stock repurchase program (the “2010 Stock Repurchase 
Program”) which authorized the Company to repurchase up to $1.0 billion of its common stock. This new authorization is in addition to the 
stock repurchase program approved by the Board in March 2008 (the “2008 Stock Repurchase Program”), which also enabled the Company 
to repurchase up to $1.0 billion of the Company’s common stock. 

Under the two stock repurchase programs, the Company repurchased approximately 19.7 million shares of its common stock at an average 
price of $28.67 per share for a total purchase price of $563.5 million in the year ended December 31, 2010, and approximately 20.7 million 
shares of its common stock at an average price of $21.91 per share for a total purchase price of $453.5 million in the year ended 
December 31, 2009. As of December 31, 2010, there were no remaining authorized funds under the 2008 Stock Repurchase Program and 
$755.1 million remaining authorized funds under the 2010 Stock Repurchase Program. 

In addition to repurchases under the Company’s stock repurchase programs, there were also broker-transacted repurchases of common stock 
from the Company's employees in connection with net issuance of shares to satisfy tax withholding obligations for the vesting of certain 
RSUs and PSAs. There were broker-transacted repurchases of approximately 0.1 million shares of common stock at an average price of 
$25.75 per share for an aggregate purchase price of $1.9 million in connection with the net issuances during the year ended December 31, 
2010. There was an immaterial amount of broker-transacted repurchases of common stock from the Company's employees in connection with 
net issuance of shares during the year ended December 31, 2009. 

All shares of common stock repurchased under the Company’s 2008 and 2010 stock repurchase programs and from its employees in 
connection with net issuances have been retired. Future share repurchases under the Company’s 2010 Stock Repurchase Program will be 
subject to a review of the circumstances in place at that time and will be made from time to time in private transactions or open market 
purchases as permitted by securities laws and other legal requirements. This program may be discontinued at any time. See Note 18, 
Subsequent Events, for discussion of the Company's stock repurchase activity in 2011. 

83  

 
 
  
  
  
  
  
  
 
  
  
  
  
  
  
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Comprehensive Income 

Juniper Networks, Inc. 
Notes to Consolidated Financial Statements — (Continued) 

Comprehensive income attributable to Juniper Networks consists of the following (in millions): 

Consolidated net income 
Other comprehensive income, net of tax: 
Change in unrealized gain (loss) on investments, net tax of nil
Change in foreign currency translation adjustment, net tax of nil
Total other comprehensive income (loss), net of tax 
Consolidated comprehensive income 

Years Ended December 31,
2009 

2008

2010

$

619.4 

   $ 

115.2 

  $

511.7 

(0.3 )   
0.5 

0.2 
619.6 

(2.8 )  
5.6 

2.8 
118.0 

2.6 
(19.0 )

(16.4 )
495.3 

— 

495.3 

Adjust for comprehensive (income) loss attributable to noncontrolling interest

Comprehensive income attributable to Juniper Networks

(1.0 )   

1.8 

$

618.6 

   $ 

119.8 

  $

Note 12.    Employee Benefit Plans 

Stock Option Plans 

2006 Equity Incentive Plan 

On May 18, 2006, the Company's stockholders adopted the Company's 2006 Equity Incentive Plan (the “2006 Plan”) to enable the granting of 
incentive stock options, nonstatutory stock options, RSUs, restricted stock, stock appreciation rights, performance shares, performance units, 
deferred stock units, and dividend equivalents to the employees and consultants of the Company. The 2006 Plan also provides for automatic, 
non-discretionary awards of nonstatutory stock options and RSUs to the Company's non-employee members of the Board. 

The maximum aggregate number of shares authorized under the 2006 Plan was 64.5 million shares of common stock, plus the addition of any 
shares subject to outstanding options under the Company's Amended and Restated 1996 Stock Plan (the “1996 Plan”) and the Company's 
2000 Nonstatutory Stock Option Plan (the “2000 Plan”) to the extent that they expire unexercised after May 18, 2006, up to a maximum of 
75.0 million additional shares of common stock. In the second quarter of 2010, the Company's stockholders approved an amendment to the 
2006 Plan that increased the number of shares reserved for issuance thereunder by an additional 30.0 million shares. 

Options granted under the 2006 Plan have a maximum term of seven years from the grant date, and generally vest and become exercisable 
over a four-year period. Subject to the terms of change of control severance agreements, and except for a limited number of shares allowed 
under the 2006 Plan, restricted stock, performance shares, RSUs, or deferred stock units that vest solely based on continuing employment or 
provision of services will vest in full no earlier than the three-year anniversary of the grant date, or in the event vesting is based on factors 
other than continued future provision of services, such awards will vest in full no earlier than the one-year anniversary of the grant date. 

The 2006 Plan provides each non-employee director an automatic grant of an option to purchase 50,000 shares of common stock on the date 
such individual first becomes a director, whether through election by the stockholders of the Company or appointment by the Board to fill a 
vacancy (the “First Option”). In addition, at each of the Company's annual stockholder meetings (i) each non-employee director who was a 
non-employee director on the date of the prior year's annual stockholder meeting shall be automatically granted RSUs for a number of shares 
equal to the Annual Value (as defined below), and (ii) each non-employee director who was not a non-employee director on the date of the 
prior year's annual stockholder meeting shall receive a RSU award for a number of shares determined by multiplying the Annual Value by a 
fraction, the numerator of which is the number of days since the non-employee director received their First Option, and the denominator of 
which is 365, rounded down to the nearest whole share. Each RSU award specified in (i) and (ii) are referred to herein as an “Annual Award.” 
The Annual Value means the number of RSUs equal to $125,000 divided by the average daily closing price of the Company's common stock 
over the six month period ending on the last day of the fiscal year preceding the date of grant. The First Option vests monthly over 
approximately three years from the grant date subject to the non-employee director's continuous service on 

 
 
  
  
 
   
   
   
   
   
 
  
  
  
 
 
     
 
 
  
 
  
 
  
 
 
  
 
  
  
  
  
  
  
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Table of Contents 

Juniper Networks, Inc. 
Notes to Consolidated Financial Statements — (Continued) 

the Board. The Annual Award shall vest approximately one year from the grant date subject to the non-employee director's continuous 
service on the Board. Under the 2006 Plan, options granted to non-employee directors have a maximum term of seven years. 

2000 Nonstatutory Stock Option Plan 

In July 2000, the Board adopted the 2000 Plan. The 2000 Plan provided for the granting of nonstatutory stock options to employees, directors, 
and consultants. Options granted under the 2000 Plan generally become exercisable over a four-year period beginning on the date of grant 
and have a maximum term of ten years. The Company had authorized 90.9 million shares of common stock for issuance under the 2000 Plan. 
Effective May 18, 2006, additional equity awards under the 2000 Plan were discontinued and new equity awards are being granted under the 
2006 Plan. Remaining authorized shares under the 2000 Plan that were not subject to outstanding awards as of May 18, 2006, were canceled 
on May 18, 2006. The 2000 Plan will remain in effect as to outstanding equity awards granted under the plan prior to May 18, 2006. 

Amended and Restated 1996 Stock Plan 

The 1996 Plan provided for the granting of incentive stock options to employees and nonstatutory stock options to employees, directors, and 
consultants. On November 3, 2005, the Board adopted an amendment to the 1996 Plan to add the ability to issue RSUs under the 1996 Plan. 
Options granted under the 1996 Plan generally became exercisable over a four-year period beginning on the date of grant and have a 
maximum term of ten years. The Company had authorized 164.6 million shares of common stock for issuance under the 1996 Plan. Effective 
May 18, 2006, additional equity awards under the 1996 Plan were discontinued and new equity awards are being granted under the 2006 
Plan. Remaining authorized shares under the 1996 Plan that were not subject to outstanding awards as of May 18, 2006, were canceled on 
May 18, 2006. The 1996 Plan will remain in effect as to outstanding equity awards granted under the plan prior to May 18, 2006. 

Plans Assumed Upon Acquisition 

In connection with the recent and past acquisitions, the Company assumed options and RSUs under the stock plans of the acquired 
companies. The Company exchanged those options and restricted stock for Juniper Networks' options and restricted stock and, in the case of 
the options, authorized the appropriate number of shares of common stock for issuance pursuant to those options. As of December 31, 2010, 
there were approximately 2.1 million shares of common stock subject to outstanding awards under plans assumed through past acquisitions. 
There was no restricted stock subject to repurchase as of December 31, 2010, and 2009. There were no restricted stock repurchases during 
2010, 2009, and 2008. 

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Stock Option Activities 

Juniper Networks, Inc. 
Notes to Consolidated Financial Statements — (Continued) 

A summary of the Company's stock option activity and related information as of and for the three years ended December 31, 2010, is set forth 
in the following table: 

Balance at December 31, 2007 

Options granted 

Options canceled 

Options exercised 

Options expired 
Balance at December 31, 2008 

Options granted 

Options canceled 

Options exercised 

Options expired 
Balance at December 31, 2009 

Options granted 

Options assumed (1) 

Options canceled 

Options exercised 

Options expired 
Balance at December 31, 2010 

As of December 31, 2010: 

Vested or expected-to-vest options 

Exercisable options 
 ________________________________ 

Outstanding Options  

Number of Shares

   Weighted-Average 
Exercise Price 

(In millions) 

(In dollars) 

66.9 

$

20.36   

Weighted Average 
Remaining 
Contractual Term
(In years)  

   Aggregate Intrinsic 
Value 

(In millions) 

15.7 

(2.4 )  

(5.7 )  

(0.9 )  
73.6 

9.9 

(2.3 )  

(8.6 )  

(5.2 )  
67.4 

6.2 

0.5 

23.08   

22.03   

14.49   

28.75   
21.24   

17.86   

21.57   

14.59   

34.91   
20.84   

29.15   

31.65   

(2.3 )  

22.03   

(21.6 )  

18.99   

(0.8 )  

49.4 

47.0 

32.1 

$

$

$

61.48   

21.90   

4.1 years  

$

744.5 

21.79   

4.1 years  

20.96   

3.5 years  

$

$

713.9 

516.1 

(1)     Stock options assumed in connection with the acquisition of Ankeena and Altor.

 
 
  
  
 
 
   
   
 
 
 
   
  
  
  
  
 
 
 
 
   
  
 
   
  
   
  
   
  
   
  
 
   
  
 
   
  
   
  
   
  
   
  
 
   
  
 
   
  
 
  
 
 
   
  
   
  
   
  
 
  
 
    
   
  
 
 
 
 
Aggregate intrinsic value represents the difference between the Company's closing stock price on the last trading day of the fiscal period, 
which was $36.92 as of December 31, 2010, and the exercise price multiplied by the number of related options. The pre-tax intrinsic value of 
options exercised, representing the difference between the fair market value of the Company's common stock on the date of the exercise and 
the exercise price of each option, was $260.3 million, $83.6 million, and $66.7 million for 2010, 2009, and 2008, respectively. Total fair 
value of options vested during 2010, 2009, and 2008 was $83.2 million, $88.9 million, and $70.3 million, respectively. 

86  

 
 
  
  
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The following table summarizes information about stock options outstanding under all option plans as of December 31, 2010: 

Juniper Networks, Inc. 
Notes to Consolidated Financial Statements — (Continued) 

Range of Exercise Price  

$0.33 - $14.68 
$14.91 - $15.09 
$15.32 - $18.13 
$18.17 - $22.55 
$22.59 - $24.14 
$24.25 - $25.20 
$25.25 - $26.90 
$26.97 - $29.89 
$29.93 - $115.48 
$0.33 - $115.48 

Number 
Outstanding  

Options Outstanding 

Weighted-Average 
Remaining 
Contractual Life 

Options Exercisable 

Weighted-Average 
Exercise Price  

Number 
Exercisable  

Weighted-Average 
Exercise Price  

(In millions) 

(In years) 

(In dollars) 

(In millions) 

(In dollars) 

5.2 
6.9 
5.1 
5.2 
6.0 
5.0 
5.2 
7.1 
3.7 

  $

2.8 
4.4 
3.6 
3.2 
4.1 
4.4 
4.8 
5.2 
4.5 

49.4 

4.1 

  $

9.92     
15.04     
17.44     
20.12     
23.56     
25.02     
26.40     
28.57     
33.94     
21.90     

4.3    $
3.7   
3.7   
4.6   
5.9   
2.8   
2.8   
2.1   
2.2   

32.1    $

9.57 
15.02 
17.55 
20.01 
23.57 
24.99 
26.29 
28.17 
34.76 

20.96 

As of December 31, 2010, approximately 32.1 million shares of common stock were exercisable at a weighted-average exercise price of 
$20.96 per share. As of December 31, 2009, approximately 44.0 million shares of common stock were exercisable at an average exercise 
price of $20.91 per share. 

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Restricted Stock Units and Performance Share Award Activities 

Juniper Networks, Inc. 
Notes to Consolidated Financial Statements — (Continued) 

RSUs generally vest over a period of three to four years from the date of grant and PSAs granted generally vest from 2010 through 2013 
provided that certain annual performance targets and other vesting criteria are met. Until vested, RSUs and PSAs do not have the voting and 
dividend participation rights of common stock and the shares underlying the awards are not considered issued and outstanding. The following 
table summarizes information about the Company's RSUs and PSAs for the three years ended December 31, 2010: 

Balance at December 31, 2007 

RSUs granted 

PSAs granted 

RSUs vested 

RSUs canceled 

PSAs canceled 
Balance at December 31, 2008 

RSUs granted 

PSAs granted 

RSUs vested 

PSAs vested 

RSUs canceled 

PSAs canceled 
Balance at December 31, 2009 

RSUs granted 

RSUs assumed (1) 

PSAs granted (2) 

RSUs vested 

PSAs vested 

RSUs canceled 

PSAs canceled 
Balance at December 31, 2010 

As of December 31, 2010: 
Vested and expected-to-vest RSUs and PSAs 
 ________________________________ 

Outstanding RSUs and PSAs 

Number of Shares 

Weighted-Average 
Fair Value  

(In millions) 

(In dollars) 

6.3 

  $

22.40   

Weighted Average 
Remaining Contractual 
Term  
(In years)  

Aggregate Intrinsic 
Value  

(In millions) 

1.5 

1.5 

(1.9 )  

(0.6 )  

(0.1 )  
6.7 

  $

1.8 

2.9 

(1.3 )  

(0.1 )  

(0.7 )  

(0.2 )  
9.1 

  $

4.0 

0.5 

3.8 

(1.8 )  

(0.4 )  

(0.6 )  

(0.4 )  

14.2 

  $

23.51   

25.61   

18.37   

21.21      

25.16      
24.59   

17.87   

18.05   

21.05   

26.90      

24.67      

19.12      
21.76   

30.19   

32.09   

29.25   

25.30      

20.64      

24.87      

22.57      
25.94   

1.7 years   $

522.9 

12.1 

  $

25.70   

1.6 years   $

448.2 

 
 
  
  
  
 
 
       
   
     
  
  
 
 
 
  
 
 
 
   
  
 
   
  
 
   
  
   
  
   
   
   
  
 
   
  
 
   
  
   
  
   
   
   
   
  
 
   
  
 
   
  
 
   
  
   
   
   
   
 
 
    
   
  
(1)     RSUs assumed in connection with the acquisitions of Ankeena and Altor.

(2)     

The number of shares subject to PSAs granted represents the aggregate maximum number of shares that may be issued pursuant to the award over its full term. The 
aggregate number of shares subject to these PSAs that would be issued if performance goals determined by the Compensation Committee are achieved at target is 1.5 
million shares. Depending on achievement of such performance goals, the range of shares that could be issued under these awards is 0 to 3.7 million shares.

Employee Stock Purchase Plan 

In April 1999, the Board approved the adoption of Juniper Networks 1999 Employee Stock Purchase Plan (the “1999 Purchase Plan”). The 
1999 Purchase Plan permits eligible employees to acquire shares of the Company's common stock through periodic payroll deductions of up 
to 10% of base compensation. Each employee may purchase no more than 6,000 shares in any twelve-month period, and in no event, may an 
employee purchase more than $25,000 worth of stock, determined at the fair market value of the shares at the time such option is granted, in 
one calendar year. The 1999 Purchase Plan is implemented in a series of offering periods, each six months in duration, or a shorter period as 
determined by the Board. The price at which the common stock may be purchased is 85% of the lesser of the fair market value of the 
Company's common stock on the first day of the applicable offering period or on the last day of the applicable offering period. 

88  

 
 
 
 
 
 
  
  
Table of Contents 

Juniper Networks, Inc. 
Notes to Consolidated Financial Statements — (Continued) 

In May 2008, the Company's stockholders approved the adoption of the Juniper Networks 2008 Employee Stock Purchase Plan (the “2008 
Purchase Plan”), which replaced the 1999 Purchase Plan. The Board reserved an aggregate of 12.0 million shares of the Company's common 
stock for issuance under the 2008 Purchase Plan. The 2008 Purchase Plan is generally similar to the 1999 Purchase Plan, except that under 
the 2008 Purchase Plan, any increases to the number of shares reserved for issuance must be approved by the Company's stockholders. The 
first offering period of the 2008 Purchase Plan commenced on the first trading day after February 1, 2009. 

Employees purchased approximately 2.0 million, 3.2 million, and 1.6 million shares of common stock through the 2008 Purchase Plan and 
1999 Purchase Plan at an average exercise price of $21.20, $12.16, and $22.57 per share during fiscal years 2010, 2009, and 2008, 
respectively. As of December 31, 2010, approximately 3.6 million shares had been issued under the 2008 Purchase Plan, and 8.4 million 
shares remained available for future issuance. Effective February 1, 2009, immediately following the conclusion of the offering period ended 
January 30, 2009, the 1999 Purchase Plan was discontinued, and no shares remained available for future issuance under such plan. 

Shares Available for Grant 

The following table presents the total number of shares available for grant under the 2006 Plan as of December 31, 2010: 

Balance at December 31, 2009 

Additional authorized share reserve approved by stockholders

RSUs and PSAs granted (1) 

Options granted 

RSUs and PSAs canceled (1) 

Options canceled (2) 

Options expired (2) 
Balance at December 31, 2010 
________________________________ 

Number of Shares 

(In millions) 

18.0 

30.0 

(16.4 )

(6.2 )

2.2 

2.3 

0.8 

30.7 

(1)     

RSUs and PSAs with a per share or unit purchase price lower than 100% of the fair market value of the Company's common stock on the day of the grant under the 2006 
Plan are counted against shares authorized under the plan as two and one-tenth shares of common stock for each share subject to such award. The number of shares subject 
to PSAs granted represents the maximum number of shares that may be issued pursuant to the award over its full term.

(2)     Includes canceled or expired options under the 1996 Plan and the 2000 Plan that expired unexercised after May 18, 2006, which become available for grant under the 2006 

Plan according to its terms. 

Common Stock Reserved for Future Issuance 

As of December 31, 2010, the Company had reserved an aggregate of approximately 102.7 million shares of common stock for future 
issuance under its stock awards plans and the 2008 Purchase Plan. 

Share-Based Compensation Expense 

The Company determines fair value of its stock options utilizing the BSM option-pricing model, which incorporates various assumptions 
including volatility, risk-free interest rate, expected life, and dividend yield. The expected volatility is based on the implied volatility of 
market traded options on the Company's common stock, adjusted for other relevant factors including historical volatility of the Company's 
common stock over the most recent period commensurate with the estimated expected life of the Company's stock options. The expected life 
of an award is based on historical experience and on the terms and conditions of the stock awards granted to employees, as well as the 
potential effect from options that had not been exercised at the time. 

 
 
  
  
  
  
  
 
 
 
 
 
 
 
 
 
  
  
  
  
  
Since 2006, the Company has granted stock option awards that have a maximum contractual life of seven years from the date of grant. Prior 
to 2006, stock option awards generally had a ten-year contractual life from the date of grant. The Company determines fair value of its RSUs 
and PSAs based upon the fair market value of the Company's common stock at the date of grant. 

89  

 
 
Table of Contents 

Juniper Networks, Inc. 
Notes to Consolidated Financial Statements — (Continued) 

The assumptions used and the resulting estimates of fair value for employee stock options and ESPP during the three years ended 
December 31, 2010, were: 

Employee Stock Options: 

Volatility factor 

Risk-free interest rate 

Expected life (years) 

Dividend yield 

Fair value per share 

ESPP: 

Volatility factor 

Risk-free interest rate 

Expected life (years) 

Dividend yield 

2010

Years Ended December 31,
2009 

2008

33% - 42%

42% - 58% 

43% - 60%

1.0% - 2.2%

0.4% - 4.2% 

1.1% - 4.4%

4.2- 4.3

—

4.3 - 5.8 

3.6 - 5.9

— 

—

$7.83-$33.83

$6.02 - $10.49 

$6.76- $10.88

35% - 36%

46% - 58% 

46% - 48%

0.2% - 0.2%

2.8% - 3.9% 

1.9% - 2.2%

0.5

—

0.5 

— 

0.5

—

Weighted-average fair value per share 

$6.19-$7.09

$4.51 - $7.35 

$7.40 - $7.80

The Company expenses the cost of its stock options on a straight-line basis over the vesting period and expenses the cost of its RSUs ratably 
over the vesting period. The Company recognizes PSA expense over the vesting period, beginning in the period in which the performance 
conditions are set. 

The Company's share-based compensation expense associated with stock options, ESPP, RSUs, and PSAs was recorded in the following cost 
and expense categories for each of the three years ended December 31, 2010 (in millions): 

Cost of revenues - Product 
Cost of revenues - Service (1) 
Research and development 
Sales and marketing (1) 
General and administrative 

Total 
 ________________________________ 

$

Years Ended December 31,

2010 

2009

2008

$ 

4.4      
13.5     
78.5     
54.9     
30.7     

$

3.9   
10.5   
59.3   
43.1   
22.9   

3.0 
9.2 
47.0 
36.2 
12.7 

$

182.0      

$ 

139.7   

$

108.1 

 
 
  
  
 
 
   
   
  
  
 
 
   
   
 
 
 
 
 
 
 
 
 
 
 
  
 
   
   
 
   
   
 
 
 
 
 
 
 
 
 
 
   
  
  
 
   
   
   
 
   
  
  
  
 
(1)     Prior period information has been reclassified to conform to the current period's presentation.

The 2010 share-based compensation expense includes the value of vested restricted shares paid to certain former Ankeena employees. For 
additional information, see Note 5, Cash, Cash Equivalents, and Investments, under the heading "Restricted Cash." 

90  

 
 
 
 
  
  
Table of Contents 

Juniper Networks, Inc. 
Notes to Consolidated Financial Statements — (Continued) 
The following table summarizes share-based compensation expense by award type for each of the three years ended December 31, 2010 (in 
millions): 

Options 
Assumed options 
Other acquisition-related compensation 
Assumed RSUs 
RSUs and PSAs 
ESPP 

Total 

$

Years Ended December 31,

2010 

2009

2008

$ 

81.5      
0.8     
4.2     
0.6     
81.8     
13.1     

$

81.2   
—   
—   
—   
44.1   
14.4   

59.7 
— 
— 
— 
35.2 
13.2 

$

182.0      

$ 

139.7   

$

108.1 

As of December 31, 2010, approximately $109.3 million of unrecognized compensation cost, adjusted for estimated forfeitures, related to 
unvested stock options will be recognized over a weighted-average period of approximately 2.3 years while approximately $151.2 million of 
unrecognized compensation cost, adjusted for estimated forfeitures, related to unvested RSUs and PSAs will be recognized over a 
weighted-average period of approximately 2.3 years. 

401(k) Plan 

Juniper Networks maintains a savings and retirement plan qualified under Section 401(k) of the Internal Revenue Code of 1986, as amended. 
Employees meeting the eligibility requirement, as defined, may contribute up to the statutory limits of the year. The Company has matched 
employee contributions since January 1, 2001. The Company currently matches 25% of all eligible employee contributions. All matching 
contributions vest immediately. The Company's matching contributions to the plan totaled $13.2 million, $11.9 million, and $10.7 million in 
2010, 2009, and 2008, respectively. 

Deferred Compensation Plan 

In July 2008, the Company formed a non-qualified deferred compensation (“NQDC”) plan, which is an unfunded and unsecured deferred 
compensation arrangement. Under the NQDC plan, officers and other senior employees may elect to defer a portion of their compensation 
and contribute such amounts to one or more investment funds. The plan assets are included within investments and offsetting obligations are 
included within accrued compensation on the consolidated balance sheet. The investments are considered trading securities and are reported 
at fair value. The realized and unrealized holding gains and losses related to these investments are recorded in interest and other income, net, 
and the offsetting compensation expense are recorded operating expenses in the consolidated statements of operations. As of December 31, 
2010, and 2009, the deferred compensation liability under this plan was approximately $8.1 million and $4.7 million, respectively. 

Note 13.    Segment Information 

The Company's chief operating decision maker (“CODM”) allocates resources and assesses performance based on financial information 
provided by the Company's business groups. The Company’s operations are organized into two reportable segments: Infrastructure and SLT. 
The Infrastructure segment includes products from the E, M, MX, and T Series router product families, EX Series switching products, as well 
as the circuit-to-packet products. The SLT segment consists primarily of SRX service gateways, Firewall virtual private network (“Firewall”) 
systems and appliances, secure socket layer (“SSL”) virtual private network (“VPN”) appliances, the J Series router product family, intrusion 
detection and prevention (“IDP”) appliances, and wide area network (“WAN”) optimization platforms. 

The primary financial measure used by the CODM in assessing performance of the segments is segment operating income, which includes 
certain cost of revenues, R&D expenses, sales and marketing expenses, and general and administrative expenses. The CODM does not 
allocate certain miscellaneous expenses to its segments even though such expenses are included in the Company's management operating 
income. 

 
 
  
 
   
   
   
 
   
  
  
  
 
  
  
  
  
  
  
 
  
  
  
For arrangements with both Infrastructure and SLT products and services, revenue is attributed to the segment based on the underlying 
purchase order, contract, or sell-through report. Direct costs and operating expenses, such as standard costs, research and development 
(“R&D”), and product marketing expenses, are generally applied to each segment. Indirect costs, such as 

91  

 
 
Table of Contents 

Juniper Networks, Inc. 
Notes to Consolidated Financial Statements — (Continued) 

manufacturing overhead and other cost of revenues, are allocated based on standard costs. Indirect operating expenses, such as sales, 
marketing, business development, and general and administrative expenses are generally allocated to each segment based on factors including 
headcount, usage, and revenue. The CODM does not allocate share-based compensation, amortization of purchased intangible assets, 
restructuring and impairment charges, gains or losses on equity investments, other net income and expense, income taxes, as well as certain 
other charges to the segments. 

The following table summarizes financial information used by the CODM for each segment (in millions): 

Net revenues: 

Infrastructure: 

Product 

Service 

2010

Years Ended December 31,
2009 

2008

$

2,511.6 

$ 

1,959.2 

$

2,301.9 

538.7 

482.4 

424.0 

Total Infrastructure revenues 

3,050.3 

2,441.6 

2,725.9 

SLT: 

Product 

Service 

Total SLT revenues 

Total net revenues 
Operating income: 

Infrastructure 

SLT 

Total segment operating income 

Other corporate (1) 

747.1 

608.8 

609.1 

295.9 

265.5 

237.4 

1,043.0 

874.3 

846.5 

4,093.3 

3,315.9 

3,572.4 

773.7 

208.0 

541.4 

127.0 

806.0 

65.8 

981.7 

668.4 

871.8 

— 

— 

(7.9 )

 
 
  
  
 
   
   
   
   
   
 
  
  
  
 
  
  
  
 
  
  
  
  
 
  
  
 
  
 
  
 
 
  
  
 
 
  
 
  
 
  
 
  
 
 
  
  
 
 
  
 
  
 
  
 
  
 
Total management operating income 

981.7 

668.4 

863.9 

Amortization of purchased intangible assets (2) 

(8.6 )   

(15.4 )  

(49.0 )

Share-based compensation expense 

Share-based payroll tax expense 

Litigation settlement charges 

Restructuring charges 

Acquisition-related charges 

Total operating income 
Interest and other income, net 
Gain (loss) on equity investments 

(182.0 )   

(139.7 )  

(108.1 )

(6.4 )   

(0.8 )  

— 

(182.3 )  

(10.8 )   

(6.3 )   

767.6 
1.9 
8.7 

(19.5 )  

— 

310.7 
6.9 
(5.5 )  

(2.8 )

(9.0 )

— 

— 

695.0 
48.7 
(14.8 )

Income before income taxes and noncontrolling interest
________________________________ 
(1)    Other corporate charges include severance and related costs associated with workforce-rebalancing activities, which are not included in the business segment results. 
(2)    Amount includes amortization expense of purchased intangible assets in operating expenses and in costs of revenues. 

312.1 

778.2 

$

$

728.9 

$ 

Depreciation expense allocated to the Infrastructure segment was $108.9 million, $94.0 million, and $86.3 million in the years ended 
December 31, 2010, 2009, and 2008, respectively. The depreciation expense allocated to the SLT segment was $37.9 million, $39.0 million, 
and $37.2 million in the years ended December 31, 2010, 2009, and 2008, respectively. 

92  

 
 
  
 
  
 
  
 
  
 
  
  
 
  
  
Table of Contents 

Juniper Networks, Inc. 
Notes to Consolidated Financial Statements — (Continued) 
The Company attributes revenues to geographic regions based on the customer's ship-to location. The following table presents net revenues 
by geographic region (in millions): 

Americas: 

United States 

Other 

Total Americas 
Europe, Middle East, and Africa 
Asia Pacific 

Total 

2010

Years Ended December 31,
2009 

2008

$

1,890.1    

$ 

1,515.1   

$

1,537.5 

205.5    

172.8   

228.7 

2,095.6    
1,189.3    
808.4    

1,687.9   
953.2   
674.8   

1,766.2 
1,077.7 
728.5 

$

4,093.3    

$ 

3,315.9   

$

3,572.4 

Verizon Communications, Inc. accounted for 10.6% of the Company's total net revenues for 2010 and AT&T, Inc. accounted for 10.4% of 
the Company's total net revenues for 2009. No single customer accounted for more than 10% of the Company's total net revenues for 2008. 

The Company tracks assets by physical location. The majority of the Company's assets, excluding cash and cash equivalents and investments, 
as of December 31, 2010, and 2009 were attributable to U.S. operations. As of December 31, 2010, and 2009, property and equipment held in 
the U.S. as a percentage of total property and equipment was 80% and 81%, respectively. Although management reviews asset information 
on a corporate level and allocates depreciation expense by segment, the CODM does not review asset information on a segment basis. 

Note 14.    Income Taxes 

The components of income before the provision for income taxes and noncontrolling interest are summarized as follows (in millions): 

Domestic 
Foreign 

Total income before provision for income taxes and noncontrolling interest

The provision for income taxes is summarized as follows (in millions): 

Current (benefit) provision: 

Federal 

State 

Years Ended December 31, 

2010 

2009

2008

370.6      
407.6     

$ 

50.1   
262.0   

$

363.7 
365.2 

778.2      

$ 

312.1   

$

728.9 

$

$

Years Ended December 31, 

2010 

2009

2008

$

(8.4 )   

$ 

123.8 

$

96.6 

1.0     

21.4 

35.8 

 
 
  
 
   
 
   
 
   
  
  
  
 
     
    
  
  
  
  
 
  
  
 
   
   
   
 
   
  
  
  
 
  
  
 
   
   
   
   
   
 
  
  
  
 
      
  
 
  
 
 
Foreign 

Total current provision 
Deferred expense (benefit): 

Federal 

State 

Foreign 

Total deferred expense 
Income tax benefits attributable to employee stock plan activity

44.2     

43.5 

39.3 

36.8     

188.7 

171.7 

57.5     

14.0     

(7.5 )   

64.0     
58.0     

(42.7 )  

21.4 

55.7 

(5.9 )  

7.1 
1.0 

(4.4 )

(2.7 )

14.3 
31.2 

Total provision for income taxes 

$

158.8     

$ 

196.8 

$

217.2 

93  

 
 
 
 
 
  
  
 
 
 
 
 
 
  
Table of Contents 

Juniper Networks, Inc. 
Notes to Consolidated Financial Statements — (Continued) 

The provision for income taxes differs from the amount computed by applying the federal statutory rate to income before provision for 
income taxes as follows (in millions): 

Expected provision at 35% rate 
State taxes, net of federal benefit 
Foreign income at different tax rates 
R&D credits 
Stock-based compensation 
Temporary differences not currently benefited 
Other 

Years Ended December 31, 

2010 

2009

2008

$

272.4     
6.2     
(71.5 )   
(18.6 )   
(40.2 )   
10.2     
0.3     

$ 

109.2 

$

(1.6 )  
(33.8 )  
(14.4 )  
62.1 
72.8 
2.5 

255.1 
16.6 
(51.2 )
(12.1 )
2.4 
— 
6.4 

Total provision for income taxes 

$

158.8     

$ 

196.8 

$

217.2 

Deferred income taxes reflect the net tax effects of tax carry-forward items and temporary differences between the carrying amounts of assets 
and liabilities for financial reporting purposes and the amounts used for income tax purposes. Significant components of the Company's 
deferred tax assets and liabilities are as follows (in millions): 

Deferred tax assets: 

Net operating loss carry-forwards 

Foreign tax credit carry-forwards 

Research and other credit carry-forwards 

Deferred revenue 

Stock-based compensation 

Reserves and accruals not currently deductible 

Other 

Total deferred tax assets 
Valuation allowance 
Deferred tax assets, net of valuation allowance 
Deferred tax liabilities: 

Property and equipment basis differences 

Purchased intangibles 

As of December 31, 

2010

2009

$ 

14.1 

$

6.2 

40.3 

68.2 

86.1 

75.6 

227.6 

26.8 

34.1 

66.0 

66.3 

68.3 

264.5 

25.8 

538.7 
(122.2 )  
416.5 

531.2 
(112.8 )
418.4 

(47.1 )  

(25.1 )

(58.5 )  

(37.8 )

 
 
  
 
   
   
   
   
   
 
  
  
  
 
 
 
 
 
 
  
 
   
   
   
 
  
  
 
 
 
  
 
 
 
 
 
 
 
 
 
  
 
 
Unremitted foreign earnings 

Other 

Total deferred tax liabilities 
Net deferred tax assets 

(175.1 )  

(148.3 )

(0.1 )  

(0.3 )

(280.8 )  

$ 

135.7 

$

(211.5 )

206.9 

As of December 31, 2010, and 2009, the Company had a valuation allowance on its U.S. domestic deferred tax assets of approximately 
$122.2 million and $112.8 million, respectively. The balance at December 31, 2010, consisted of approximately $80.6 million against the 
Company's California deferred assets and approximately $41.6 million related to losses that are capital in nature that will carry forward to 
offset future capital gains. The valuation allowance increased $9.4 million and $71.3 million in the years ended December 31, 2010, and 
2009, respectively. The 2010 and 2009 increases were primarily due to changes in California income tax law which impacted the future 
taxable income within California and the tax rates that would apply to taxable income for the years in which the deferred tax assets are 
expected to be realized or settled. Based upon the estimates of the Company's future California taxable income, the Company has provided a 
valuation allowance on its remaining California deferred tax assets of $11.9 million in the year ended December 31, 2010. 

As of December 31, 2010 the Company had federal and California net operating loss carry-forwards of approximately $37.0 million and 
$44.4 million, respectively. The Company also had California tax credit carry-forwards of approximately $138.4 million. Approximately 
$18.2 million of the benefit from the California tax credit carry-forwards will be credited to additional 

94  

 
 
 
  
  
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Juniper Networks, Inc. 
Notes to Consolidated Financial Statements — (Continued) 

paid-in capital when realized on the Company's income tax returns since they have not met the recognition criteria set forth in ASC Topic 
718. Unused net operating loss carry-forwards will expire at various dates beginning in the year 2012. The California tax credit 
carry-forwards will carry forward indefinitely. 

The Company provides U.S. income taxes on the earnings of foreign subsidiaries unless the subsidiaries' earnings are considered indefinitely 
reinvested outside of the United States. The Company has made no provision for U.S. income taxes on approximately $1,200.0 million of 
cumulative undistributed earnings of certain foreign subsidiaries through December 31, 2010, because it is the Company's intention to 
permanently reinvest such earnings. If such earnings were distributed, the Company would accrue additional income taxes expense of 
approximately $367.9 million. These earnings are considered indefinitely invested in operations outside of the U.S., as we intend to utilize 
these amounts to fund future expansion of our international operations. 

As of December 31, 2010, 2009, and 2008 the total amount of gross unrecognized tax benefits was $116.4 million, $183.6 million, and 
$113.5 million, respectively. As of December 31, 2010, approximately $100.2 million of the $116.4 million gross unrecognized tax benefits, 
if recognized, would affect the effective tax rate. 

A reconciliation of the beginning and ending amount of the Company's total gross unrecognized tax benefits for the years ended 
December 31, 2010, 2009, and 2008 is as follows (in millions): 

Balance beginning of the year 
Tax positions related to current year: 

Additions 
Tax positions related to prior years: 

Additions 

Reductions 
Settlements 
Lapses in statutes of limitations 
Balance end of the year 

2010 
183.6     

$

2009

2008

$ 

113.5 

$

94.7 

13.9     

12.7 

17.9 

—     

73.5 

(73.8 )   
(1.6 )   
(5.7 )   
116.4     

$

(1.0 )  
(12.8 )  
(2.3 )  

$ 

183.6 

$

113.5 

1.3 

— 
(0.4 )
— 

As of December 31, 2010, 2009, and 2008 the Company had accrued interest and penalties related to unrecognized tax benefits of $18.9 
million, $23.5 million, and $8.7 million respectively, within other long-term liabilities in the consolidated balance sheets. In accordance with 
the Company's accounting policy, accrued interest and penalties related to unrecognized tax benefits are recognized as a component of tax 
expense in the consolidated statements of operations. The Company recognized a benefit for net interest and penalties of $4.6 million, and an 
expense of $14.8 million and $2.9 million in its consolidated statements of operations during the years ending December 31, 2010, 2009, and 
2008, respectively. 

The Company engages in continuous discussions and negotiations with tax authorities regarding tax matters in various jurisdictions. It is 
reasonably possible that the balance of the gross unrecognized tax benefits will decrease by approximately $8.1 million within the next 
twelve months due to potential settlements with tax authorities and lapses of applicable statutes of limitations. At this time, the Company is 
unable to make a reasonably reliable estimate of the timing of payments related to the remaining unrecognized tax liabilities due to 
uncertainties in the timing of tax audit outcomes. 

During 2010, the Company recognized approximately $73.4 million of tax benefits related to share based compensation, which the Company 
had previously recorded as unrecognized tax benefits in 2009. On March 22, 2010, the Court overturned its May 27, 2009 decision in Xilinx 
v. Commissioner and affirmed the original U.S. Tax Court decision, which held in favor of the taxpayer. While Juniper Networks was not a 
named party to the case, the Court's decision eliminates the uncertainty regarding the benefit of the tax position taken by the Company in 
certain years prior to fiscal 2004 relative to the allocable transfer price of share-based compensation related to the Company's intangible 
development costs. The Court's decision affirms that the value of share-based compensation related to share-based compensation grants made 

 
 
  
  
  
  
 
   
   
   
   
   
 
  
  
 
 
 
  
  
 
 
 
 
  
  
 
 
 
 
  
  
  
prior to 2004 is not required to be included in cost sharing agreements between related parties. In light of the Court's decision, the Company 
has determined that the tax benefit recognized under its prior tax position is more likely than not to be sustained. 

The Company conducts business globally and, as a result, Juniper Networks or one or more of its subsidiaries files income tax 

95  

 
 
  
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Juniper Networks, Inc. 
Notes to Consolidated Financial Statements — (Continued) 
returns in the U.S. federal jurisdiction and various state and foreign jurisdictions. In the normal course of business the Company is subject to 
examination by taxing authorities throughout the world, including such major jurisdictions as Ireland, Hong Kong, U.K., France, Germany, 
The Netherlands, Japan, China, Australia, India, and the U.S. With few exceptions, the Company is no longer subject to U.S. federal, state 
and local, and non-U.S. income tax examinations for years before 2004, although carry-forward attributes that were generated prior to 
2004 may still be adjusted upon examination by the Internal Revenue Service ("IRS") if the attributes either have been or will be used in a 
future period. 

The Company is currently under examination by the IRS for the 2004 through 2006 tax years, the China tax authorities for the 2009 tax year, 
and the France tax authorities for the 2007 through 2009 tax years. The Company is also subject to two separate ongoing examinations by the 
India tax authorities for the 2004 tax year and 2004 through 2008 tax years, respectively, and has received an inquiry from the Hong Kong tax 
authorities for the 2002 through 2008 tax years. Additionally, the Company has not reached a final resolution with the IRS on an adjustment 
it proposed for the 1999 and 2000 tax years. The Company is not aware of any other examination by taxing authorities in any other major 
jurisdictions in which it files income tax returns as of December 31, 2010. 

In 2009, as part of the on-going 2004 IRS audit, the Company received a proposed adjustment related to the license of acquired intangibles 
under an intercompany R&D cost sharing arrangement. In 2009 and in April 2010, the Company received assessments from the Hong Kong 
tax authorities specifically related to inquiries of the 2002 and 2003 tax years, respectively. In 2008, the Company received a proposed 
adjustment from the India tax authorities related to the 2004 tax year. 

In 2009, the India tax authorities commenced a separate investigation of our 2004 through 2008 tax returns and are disputing the Company's 
determination of taxable income due to the cost basis of certain fixed assets. The Company accrued $4.6 million in penalties and interest in 
2009 relevant to this matter. The Company understands that the India tax authorities may issue an initial assessment that is substantially 
higher than this amount. As a result, in accordance with the administrative and judiciary process in India, the Company may be required to 
make payments that are substantially higher than the amount accrued in order to ultimately settle this issue. The Company strongly believes 
that any assessment it may receive in excess of the amount accrued would be inconsistent with applicable India tax laws and intends to 
defend this position vigorously. 

The Company is pursuing all available administrative procedures relative to the matters referenced above. The Company believes that it has 
adequately provided for any reasonably foreseeable outcomes related to these proposed adjustments and the ultimate resolution of these 
matters is unlikely to have a material effect on its consolidated financial condition or results of operations; however there is still a possibility 
that an adverse outcome of these matters could have a material effect on its consolidated financial condition and results of operations. For 
more information, please see Note 15, Commitments and Contingencies, under the heading “IRS Notices of Proposed Adjustments.” 

Note 15.    Commitments and Contingencies 

Commitments 

The following table summarizes the Company's principal contractual obligations as of December 31, 2010, (in millions): 

Operating leases 
Purchase 
commitments 
Tax liabilities 
Other contractual 
obligations 

Total 

2011 

2012

2013

2014

2015 

   Thereafter

Other

$ 

296.3      $ 

51.1      $ 

45.4    $

35.1    $

29.8    $

23.1      $ 

111.8    $

198.6     

198.6     

103.9     

—     

—   

—   

95.1     

65.8     

18.0   

—   

—   

9.5   

—   

—   

1.8   

—     

—     

—     

—   

—   

—   

— 

— 

103.9 

— 

Total 

$ 

693.9      $ 

315.5      $ 

63.4    $

44.6    $

31.6    $

23.1      $ 

111.8    $

103.9 

Operating Leases 

The Company leases its facilities under operating leases that expire at various times, the longest of which expires on November 22, 2022. 

 
 
  
  
  
  
  
 
  
  
  
 
   
       
       
     
     
     
       
     
  
  
  
 
 
 
 
  
  
Future minimum payments under the non-cancelable operating leases totaled $296.3 million as of December 31, 2010. Rent expense for 
2010, 2009, and 2008 was approximately $55.9 million, $56.6 million, and $58.0 million, respectively. 

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Juniper Networks, Inc. 
Notes to Consolidated Financial Statements — (Continued) 

In October 2009, the Company amended three existing leases for the Company's corporate headquarters facilities in Sunnyvale, California. 
Each lease was amended to: (i) extend the underlying lease term, and (ii) establish new monthly base rent payments for periods after 
November 1, 2009. The new monthly base rent payments represent a significant reduction in base rent that would have been payable for the 
previously remaining terms of each of the underlying leases. 

Purchase Commitments 

In order to reduce manufacturing lead times and ensure adequate component supply, contract manufacturers utilized by the Company place 
non-cancelable, non-returnable (“NCNR”) orders for components based on the Company's build forecasts. As of December 31, 2010, there 
were NCNR component orders placed by the contract manufacturers with a value of $198.6 million. The contract manufacturers use the 
components to build products based on the Company's forecasts and on purchase orders that the Company has received from customers. 
Generally, the Company does not own the components and title to the products transfers from the contract manufacturers to the Company and 
immediately to the Company's customers upon delivery at a designated shipment location. If the components remain unused or the products 
remain unsold for specified periods, the Company may incur carrying charges or obsolete materials charges for components that the contract 
manufacturers purchased to build products to meet the Company's forecast or customer orders. As of December 31, 2010, the Company had 
accrued $22.7 million based on its estimate of such charges. 

Tax Liabilities 

As of December 31, 2010, the Company had $103.9 million included in long-term liabilities in the consolidated balance sheet for 
unrecognized tax positions. At this time, the Company is unable to make a reasonably reliable estimate of the timing of payments related to 
the $103.9 million in liability due to uncertainties in the timing of tax audit outcomes. 

Other Contractual Obligations 

As of December 31, 2010, other contractual obligations primarily consisted of $65.0 million of indemnity-related and service related escrows, 
required by certain acquisitions completed in 2005 and 2010, $13.2 million remaining balance for a data center hosting agreement that 
requires payments through the end of April 2013, $9.2 million for license and service agreements, and $7.7 million under a software 
subscription agreement that requires payments through the end of January 2011. 

Guarantees 

The Company enters into agreements with customers that contain indemnification provisions relating to potential situations where claims 
could be alleged that the Company's products infringe the intellectual property rights of a third party. Other guarantees or indemnification 
arrangements include guarantees of product and service performance, guarantees related to third-party customer financing arrangements, and 
standby letters of credit for certain lease facilities. As of December 31, 2010, the Company had $21.6 million in guarantees and standby 
letters of credit. As of December 31, 2009, the Company had $34.0 million in guarantees and standby letters of credit. 

Legal Proceedings 

From time to time, the Company is involved in disputes, litigation, and other legal actions, including the matters described below. The 
Company is aggressively defending its current litigation matters, however, the outcome of these matters is currently not determinable. There 
are many uncertainties associated with any litigation, and these actions or other third-party claims against the Company may cause the 
Company to incur costly litigation and/or substantial settlement charges. In addition, the resolution of any future intellectual property 
litigation may require the Company to make royalty payments, which could adversely affect gross margins in future periods. If any of those 
events were to occur, the Company's business, financial condition, results of operations, and cash flows could be adversely affected. The 
actual liability in any such matters may be materially different from the Company's estimates, which could result in the need to adjust the 
liability and record additional expenses. 

Federal Securities Class Action 

On July 14, 2006, and August 29, 2006, two purported class actions were filed in the Northern District of California against the Company and 
certain of the Company's current and former officers and directors. On November 20, 2006, the Court consolidated the two actions as In re 
Juniper Networks, Inc. Securities Litigation, No. C06-04327-JW, and appointed the New 

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Juniper Networks, Inc. 
Notes to Consolidated Financial Statements — (Continued) 
York City Pension Funds as lead plaintiffs. The lead plaintiffs filed a Consolidated Class Action Complaint on January 12, 2007, and filed an 
Amended Consolidated Class Action Complaint on April 9, 2007. The Amended Consolidated Complaint alleges that the defendants violated 
federal securities laws by manipulating stock option grant dates to coincide with low stock prices and issuing false and misleading statements 
including, among others, incorrect financial statements due to the improper accounting of stock option grants. The Amended Consolidated 
Complaint asserts claims for violations of the Securities Act of 1933 and the Securities Exchange Act of 1934 on behalf of all persons who 
purchased or otherwise acquired Juniper Networks' publicly-traded securities from July 12, 2001, through and including August 10, 2006. 
Plaintiffs seek unspecified damages in an unspecified amount. On June 7, 2007, the defendants filed a motion to dismiss certain of the claims, 
and a hearing was held on September 10, 2007. On March 31, 2008, the Court issued an order granting in part and denying in part the 
defendants' motion to dismiss. The order dismissed with prejudice plaintiffs' section 10(b) claim to the extent it was based on challenged 
statements made before July 14, 2001. The order also dismissed, with leave to amend, plaintiffs' section 10(b) claim against Pradeep Sindhu. 
The order upheld all of plaintiffs' remaining claims. Plaintiffs did not amend their complaint. 

On September 25, 2009, the Court certified a plaintiff class consisting of all persons and entities who purchased or otherwise acquired the 
Company's securities from July 11, 2003 to August 10, 2006 inclusive, and were damaged thereby, including those who received or acquired 
Juniper Networks' common stock issued pursuant to the registration statement on SEC Form S-4, dated March 10, 2004, for the Company's 
merger with NetScreen Technologies Inc.; and purchasers of Zero Coupon Convertible Senior Notes due June 15, 2008 issued pursuant to a 
registration statement on SEC Form S-3 dated November 20, 2003. Excluded from the Class are the Defendants and the current and former 
officers and directors of the Company, their immediate families, their heirs, successors, or assigns and any entity controlled by any such 
person. 

On February 5, 2010, the Company and the lead plaintiffs entered into an agreement in principle to settle the claims against the Company and 
each of the Company's current and former officers and directors. On August 31, 2010, the Court issued an order granting final approval to the 
settlement and issuing an order of dismissal with prejudice. Under the terms of the settlement, the claims against the Company and its officers 
and directors were dismissed with prejudice and released in exchange for a $169.0 million cash payment by the Company. The Company 
considered the proposed payment to be probable and reasonably estimable and, therefore, recorded the cash settlement amount as a pre-tax 
operating expense in its consolidated statement of operations for the fourth quarter ended December 31, 2009. 

IPO Allocation Case 

In December 2001, a class action complaint was filed in the United States District Court for the Southern District of New York against the 
Goldman Sachs Group, Inc., Credit Suisse First Boston Corporation, FleetBoston Robertson Stephens, Inc., Royal Bank of Canada (Dain 
Rauscher Wessels), SG Cowen Securities Corporation, UBS Warburg LLC (Warburg Dillon Read LLC), Chase (Hambrecht & Quist LLC), 
J.P. Morgan Chase & Co., Lehman Brothers, Inc., Salomon Smith Barney, Inc., Merrill Lynch, Pierce, Fenner & Smith, Incorporated 
(collectively, the “Underwriters”), Juniper Networks and certain of Juniper Networks' officers. This action was brought on behalf of 
purchasers of the Company's common stock in its initial public offering in June 1999 and the Company's secondary offering in September 
1999.   Specifically, among other things, this complaint alleged that the prospectus pursuant to which shares of common stock were sold in 
the Company's initial public offering and the Company's subsequent secondary offering contained certain false and misleading statements or 
omissions regarding the practices of the Underwriters with respect to their allocation of shares of common stock in these offerings and their 
receipt of commissions from customers related to such allocations. Various plaintiffs have filed actions asserting similar allegations 
concerning the initial public offerings of approximately 300 other issuers. These various cases pending in the Southern District of New York 
have been coordinated for pretrial proceedings as In re Initial Public Offering Securities Litigation, 21 MC 92. In April 2002, the plaintiffs 
filed a consolidated amended complaint in the action against the Company, alleging violations of the Securities Act of 1933 and the Securities 
Exchange Act of 1934. The defendants in the coordinated proceeding filed motions to dismiss. On February 19, 2003, the Court granted in 
part and denied in part the motion to dismiss, but declined to dismiss the claims against the Company. 

The parties have reached a global settlement of the litigation. On October 5, 2009, the Court entered an Opinion and Order granting final 
approval of the settlement. Under the settlement, the insurers are to pay the full amount of settlement share allocated to the Company, and the 
Company will bear no financial liability. The Company and other defendants will receive complete dismissals from the case. Certain 
objectors have appealed the Court's October 5, 2009, final order to the Second Circuit Court of Appeals. Plaintiffs have filed motions to 
dismiss the appeals. 

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IRS Notices of Proposed Adjustments 

Juniper Networks, Inc. 
Notes to Consolidated Financial Statements — (Continued) 

In 2007, the IRS opened an examination of the Company's U.S. federal income tax and employment tax returns for the 2004 fiscal year. 
Subsequently, the IRS extended their examination of the Company's employment tax returns to include fiscal years 2005 and 2006. As of 
December 31, 2010, the IRS has not yet concluded its examinations of these returns. In September 2008, as part of its ongoing audit of the 
U.S. federal income tax return, the IRS issued a Notice of Proposed Adjustment (“NOPA”) regarding the Company's business credits. The 
Company believes that it has adequately provided for any reasonable foreseeable outcome related to this proposed adjustment. In 2009, the 
Company received a NOPA from the IRS claiming that the Company owes additional taxes, plus interest and possible penalties, for the 2004 
tax year based on a transfer pricing transaction related to the license of acquired intangibles under an intercompany R&D cost sharing 
arrangement. The asserted changes to the Company's 2004 tax year would affect the Company's income tax liabilities in tax years subsequent 
to 2003. Because of the NOPA, the estimated incremental tax liability would be approximately $807 million, excluding interest and penalties. 
The Company has filed a protest to the proposed deficiency with the IRS, which has been referred to the Appeals Division of the IRS. As of 
December 31, 2010, an Appeals conference has not yet been scheduled. The Company strongly believes the IRS' position with regard to this 
matter is inconsistent with applicable tax laws and existing Treasury regulations, and that the Company's previously reported income tax 
provision for the year in question is appropriate. However, there can be no assurance that this matter will be resolved in the Company's favor. 
Regardless of whether this matter is resolved in the Company's favor, the final resolution of this matter could be expensive and 
time-consuming to defend and/or settle. While the Company believes it has provided adequately for this matter, there is still a possibility that 
an adverse outcome of the matter could have a material effect on its results of operations and financial condition. 

The Company has not reached a final resolution with the IRS on an adjustment the IRS proposed for the 1999 and 2000 tax years. The 
Company is also under routine examination by certain state and non-U.S. tax authorities. The Company believes that it has adequately 
provided for any reasonably foreseeable outcome related to these audits. 

Note 16.      Joint Venture 

In 2009, the Company entered into an agreement to form a joint venture to provide a combined carrier Ethernet-based solution with NSN. At 
inception, the Company contributed $6.6 million for a 60 percent interest in the joint venture. Both NSN and Juniper Networks are entitled to 
appoint two board members to the board of the joint venture. The board will consist of four board members at all times. 

Given the Company's majority ownership interest in the joint venture, the venture's financial results have been consolidated with the accounts 
of the Company, and a noncontrolling interest has been recorded to reflect the noncontrolling investor's interest in the venture's results. All 
intercompany transactions have been eliminated, with the exception of the noncontrolling interest. 

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Note 17.      Selected Quarterly Financial Data (Unaudited) 

Juniper Networks, Inc. 
Notes to Consolidated Financial Statements — (Continued) 

The table below sets forth selected unaudited financial data for each quarter of the two years ended December 31, 2010 (in millions, except 
per share amounts): 

Year Ended December 31, 2010 
Net revenues: 

Product 

Service 

Total net revenues 
Cost of revenues: 

Product 

Service 

Total cost of revenues 
Gross margin 
Operating expenses: 

Research and development 

Sales and marketing 

General and administrative 

Amortization of purchased intangibles 

Restructuring charges 

Acquisition-related charges 

Total operating expenses 
Operating income 
Interest and other income (expense), net
Loss on equity investments 

Income before income taxes and noncontrolling interest
Income tax (benefit) provision 
Consolidated net income 

First Quarter

  Second Quarter     Third Quarter

  Fourth Quarter

$

721.2 

  $

774.1      $ 

801.2    $

962.2 

191.4 

204.2     

211.2   

227.8 

912.6 

978.3     

1,012.4   

1,190.0 

222.4 

78.2 

300.6 
612.0 

207.0 

192.4 

43.1 

1.1 

8.1 

— 

451.7 
160.3 
1.4 
— 

161.7 

(2.9 )  

164.6 

231.8     

247.0   

299.7 

86.6     

87.6   

98.3 

318.4     
659.9     

224.8     

202.3     

45.9     

1.2     

0.2     

0.5     

474.9     
185.0     
0.8     
3.2     

189.0     
58.7     
130.3     

334.6   
677.8   

398.0 
792.0 

231.2   

254.9 

204.7   

257.7 

43.8   

45.1 

0.9   

0.2   

1.5   

482.3   
195.5   
0.2   
—   

195.7   
61.4   
134.3   

0.9 

2.3 

4.3 

565.2 
226.8 
(0.6 )
5.4 

231.6 
41.5 
190.1 

 
 
 
  
  
  
  
 
   
   
   
   
   
 
   
 
  
 
      
    
  
 
 
 
 
 
     
 
 
 
 
 
 
 
 
 
     
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Adjust for net (income) loss attributable to noncontrolling interest
Net income attributable to Juniper Networks 

(1.5 )  

$

163.1 

  $

0.2     
130.5      $ 

0.2   
134.5    $

0.1 
190.2 

Net income per share attributable to Juniper Networks common 
stockholders: 

Basic 

Diluted 

0.31 

  $

0.25      $ 

0.26    $

0.36 

0.30 

  $

0.24      $ 

0.25    $

0.35 

$

$

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Year Ended December 31, 2009 
Net revenues: 

Product 

Service 

Total net revenues 
Cost of revenues: 

Cost of revenues - Product 

Cost of revenues - Service 

Total cost of revenues 
Gross margin 
Operating expenses: 

Research and development 

Sales and marketing 

General and administrative 

Amortization of purchased intangibles 

Litigation settlement charges 

Restructuring charges 

Total operating expenses 
Operating income 
Interest and other income, net 
Gain on equity investments 

Juniper Networks, Inc. 
Notes to Consolidated Financial Statements — (Continued) 

First Quarter

  Second Quarter     Third Quarter

  Fourth Quarter

$

587.8 

  $

607.0       $ 

634.1    $

739.1 

176.3 

179.4     

189.8   

202.4 

764.1 

786.4     

823.9   

941.5 

193.0 

68.8 

261.8 
502.3 

185.4 

187.9 

39.2 

4.4 

— 

4.2 

421.1 
81.2 
2.0 
(1.7 )  

81.5 
85.9 
(4.4 )  
— 

$

(4.4 )   $

207.6     

206.3   

234.8 

72.4     

74.3   

75.5 

280.0     
506.4     

183.9     

176.6     

280.6   
543.3   

310.3 
631.2 

185.2   

187.2 

183.4   

211.3 

39.2     

39.9   

41.2 

1.2 

1.3   

3.5     

—     

7.5     

410.7     
95.7     
2.9     
(1.6 )   

97.0     
82.2     
14.8     
—     
14.8       $ 

1.0   

181.3 

4.5   

3.2 

415.3   
128.0   
1.7   
—   

129.7   
45.9   
83.8   
—   
83.8    $

625.4 
5.8 
0.3 
(2.2 )

3.9 
(17.2 )
21.1 
1.8 
22.9 

Income before income taxes and noncontrolling interest
Income tax provision (benefit) 
Consolidated net (loss) income 
Adjust for net loss attributable to noncontrolling interest
Net (loss) income attributable to Juniper Networks 

Net (loss) income per share attributable to Juniper Networks common 
stockholders: 

 
 
 
   
   
   
   
   
 
   
 
  
 
      
    
  
 
 
  
 
      
    
  
 
 
 
 
  
 
      
    
  
 
 
 
 
 
 
 
 
 
 
 
 
  
  
      
     
  
Basic 

Diluted 

Note 18.    Subsequent Event 

Stock Repurchases 

$

$

(0.01 )   $

0.03       $ 

0.16    $

0.04 

(0.01 )   $

0.03       $ 

0.16    $

0.04 

Subsequent to December 31, 2010, through the filing of this report, the Company repurchased 4.8 million shares of its common stock, for 
$200.3 million at an average purchase price of $42.14 per share, under its 2010 Stock Repurchase Program. As of the filing of this Annual 
Report on Form 10-K, the Company's 2010 Stock Repurchase Program had remaining authorized funds of $554.8 million. Purchases under 
the Company's 2010 Stock Repurchase Program are subject to a review of the circumstances in place at the time and will be made from time 
to time as permitted by securities laws and other legal requirements. This program may be discontinued at any time. 

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ITEM 9.    Changes in and Disagreements with Accountants on Accounting and Financial Disclosures 

None. 

ITEM 9A.    Controls and Procedures 

(a) Management's Annual Report on Internal Control Over Financial Reporting:  Please see "Management's Annual Report on Internal 
Control over Financial Reporting" under Item 8 on page 57 of this Form 10-K, which report is incorporated herein by reference. 

(b) For the “Report of Independent Registered Public Accounting Firm,” please see the report under Item 8 on page 56 of this Form 10-K, 
which report is incorporated herein by reference. 

Evaluation of Disclosure Controls and Procedures 

Attached as exhibits to this report are certifications of our principal executive officer and principal financial officer, which are required in 
accordance with Rule 13a-14 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”). This “Controls and Procedures” 
section includes information concerning the controls and related evaluations referred to in the certifications, and it should be read in 
conjunction with the certifications for a more complete understanding of the topics presented. 

We carried out an evaluation, under the supervision and with the participation of our management, including our principal executive officer 
and principal financial officer, of the effectiveness of the design and operation of our disclosure controls and procedures, as defined in 
Rules 13a-15(e) and 15d-15(e) under the Exchange Act. Based upon that evaluation, our principal executive officer and principal financial 
officer concluded that, as of the end of the period covered in this report, our disclosure controls and procedures were effective to ensure that 
information required to be disclosed by us in reports that we file or submit under the Exchange Act is recorded, processed, summarized, and 
reported within the time periods specified in Securities and Exchange Commission rules and forms and is accumulated and communicated to 
our management, including our principal executive officer and principal financial officer, as appropriate to allow timely decisions regarding 
required disclosure. 

Changes in Internal Controls 

There were no changes in our internal control over financial reporting that occurred during the fourth quarter of fiscal 2010 that have 
materially affected, or are reasonably likely to materially affect, our internal control over financial reporting. 

Inherent Limitations on Effectiveness of Controls 

Our management, including the Chief Executive Officer and Chief Financial Officer, does not expect that our disclosure controls or our 
internal control over financial reporting will prevent or detect all error and all fraud. A control system, no matter how well designed and 
operated, can provide only reasonable, not absolute, assurance that the control system's objectives will be met. Our controls and procedures 
are designed to provide reasonable assurance that our control system's objective will be met and our Chief Executive Officer and Chief 
Financial Officer have concluded that our disclosure controls and procedures are effective at the reasonable assurance level. The design of a 
control system must reflect the fact that there are resource constraints, and the benefits of controls must be considered relative to their costs. 
Further, because of the inherent limitations in all control systems, no evaluation of controls can provide absolute assurance that misstatements 
due to error or fraud will not occur or that all control issues and instances of fraud, if any, within the Company have been detected. These 
inherent limitations include the realities that judgments in decision-making can be faulty and that breakdowns can occur because of simple 
error or mistake. Controls can also be circumvented by the individual acts of some persons, by collusion of two or more people, or by 
management override of the controls. The design of any system of controls is based in part on certain assumptions about the likelihood of 
future events. Projections of any evaluation of controls effectiveness to future periods are subject to risks. Over time, controls may become 
inadequate because of changes in conditions or deterioration in the degree of compliance with policies or procedures. 

ITEM 9B.    Other Information 

None 

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PART III 

ITEM 10.      Directors and Executive Officers of the Registrant 

We have adopted a Worldwide Code of Business Conduct and Ethics that applies to our principal executive officer and all other employees. 
This code of ethics is posted on our Website at www.juniper.net, and may be found as follows: 

1. From our main Web page, first click on “Company” and then on “Investor Relations.” 

2. Next, select Corporate Governance and then click on “Worldwide Code of Business Conduct and Ethics.” 

Alternatively, you may obtain a free copy of this code of ethics by contacting the Investor Relations Department at our corporate offices by 
calling (888) 586-4737 or by sending an e-mail message to investor-relations@juniper.net. 

We intend to satisfy the disclosure requirement under Item 5.05 of Form 8-K regarding an amendment to, or waiver from, a provision of this 
code of ethics by posting such information on our Website, at the address and location specified above. 

For information with respect to Executive Officers, see Part I, Item 1 of this Annual Report on Form 10-K, under “Executive Officers of the 
Registrant.” 

Information concerning directors, including director nominations, and our audit committee and audit committee financial expert, appearing in 
our definitive Proxy Statement to be filed with the SEC in connection with the 2011 Annual Meeting of Stockholders (the “Proxy Statement”) 
under “Corporate Governance Principles and Board Matters,” “Director Compensation” and “Election of Directors” is incorporated herein by 
reference. 

Information concerning Section 16(a) beneficial ownership reporting compliance appearing in the Proxy Statement under “Section 16(a) 
Beneficial Ownership Reporting Compliance,” is incorporated herein by reference. 

ITEM 11.    Executive Compensation 

Information concerning executive compensation appearing in the Proxy Statement under “Executive Compensation” is incorporated herein by 
reference. 

Information concerning compensation committee interlocks and insider participation appearing in the Proxy Statement under “Compensation 
Committee Interlocks and Insider Participation” is incorporated herein by reference. 

Information concerning the compensation committee report appearing in the Proxy Statement under “Compensation Committee Report” is 
incorporated herein by reference. 

ITEM 12.      Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters 

Information concerning the security ownership of certain beneficial owners and management appearing in the Proxy Statement, under 
“Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters,” is incorporated herein by reference. 

Information concerning our equity compensation plan information appearing in the Proxy Statement, under “Equity Compensation Plan 
Information,” is incorporated herein by reference. 

ITEM 13.    Certain Relationships and Related Transactions, and Director Independence 

The information appearing in the Proxy Statement under the heading “Certain Relationships and Related Transactions” is incorporated herein 
by reference. 

 
 
 
  
  
 
  
  
  
  
  
  
  
  
  
 
  
  
  
  
 
  
  
  
 
  
The information appearing in the Proxy Statement under the heading “Board Independence” is incorporated herein by reference. 

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ITEM 14.    Principal Accountant Fees and Services 

Information concerning principal accountant fees and services and the audit committee's preapproval policies and procedures appearing in the 
Proxy Statement under the headings “Principal Accountant Fees and Services” is incorporated herein by reference. 

PART IV 

ITEM 15.    Exhibits and Financial Statement Schedules 

(a)   The following documents are filed as part of this report: 

1. Consolidated Financial Statements 

See Index to Consolidated Financial Statements at Item 8 herein. 

2. Financial Statement Schedules 

The following financial statement schedule is included as part of this Annual Report on Form 10-K: 

Schedule 
Schedule II - Valuation and Qualifying Account 

Page
107

Schedules not listed above have been omitted because the information required to be set forth therein is not applicable or is shown in the 
financial statements or notes herein. 

3. Exhibits 

See Exhibit Index on page 108 of this report. 

(b) Exhibits 

See Exhibit Index on page 108 of this report. 

(c) None 

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SIGNATURES 

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be 
signed on its behalf by the undersigned, thereunto duly authorized, in this City of Sunnyvale, State of California, on the 25th day of February 
2011. 

Juniper Networks, Inc. 

By: 

/s/  Robyn M. Denholm
Robyn M. Denholm
Executive Vice President and Chief Financial Officer
(Duly Authorized Officer and Principal 
Financial Officer)

By: 

/s/  Gene Zamiska
Gene Zamiska
Vice President, Finance and Corporate Controller
(Duly Authorized Officer and Principal Accounting Officer)

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POWER OF ATTORNEY 

KNOW ALL PERSONS BY THESE PRESENTS, that each person whose signature appears below hereby constitutes and appoints Mitchell 
Gaynor and Robyn M. Denholm, and each of them individually, as his or her attorney-in-fact, each with full power of substitution, for him or 
her in any and all capacities to sign any and all amendments to this Annual Report on Form 10-K, and to file the same with, with exhibits 
thereto and other documents in connection therewith, with the Securities and Exchange Commission, hereby ratifying and confirming all that 
said attorney-in-fact, or his or her substitute, may do or cause to be done by virtue hereof. 

Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of 
the registrant and in the capacities and on the dates indicated. 

Signature 

Title

Date

/s/  Kevin R. Johnson 
Kevin R. Johnson 

   Chief Executive Officer and Director 

(Principal Executive Officer) 

/s/  Robyn M. Denholm 

Robyn M. Denholm 

   Executive Vice President and
Chief Financial Officer 
(Principal Financial Officer)

February 25, 2011

February 25, 2011

/s/  Gene Zamiska 
Gene Zamiska 

/s/  Scott Kriens 
Scott Kriens 

/s/  Pradeep Sindhu 
Pradeep Sindhu 

/s/  Robert M. Calderoni 
Robert M. Calderoni 

/s/  Mary B. Cranston 
 Mary B. Cranston 

/s/  Michael Lawrie 
 Michael Lawrie 

/s/  William F. Meehan 
 William F. Meehan 

David Schlotterbeck 

/s/  Stratton Sclavos 
 Stratton Sclavos 

   Vice President, Finance and Corporate Controller 

February 25, 2011

(Principal Accounting Officer) 

   Chairman of the Board

February 25, 2011

   Chief Technical Officer and Vice Chairman of the 

February 25, 2011

Board 

   Director

   Director

   Director

   Director

   Director

   Director

February 25, 2011

February 25, 2011

February 25, 2011

February 25, 2011

February 25, 2011

February 25, 2011

 
 
 
  
  
  
  
 
 
 
 
 
 
  
  
  
 
  
 
  
  
  
 
  
  
 
  
 
  
  
  
  
  
  
 
  
 
  
  
  
 
  
  
 
  
 
  
  
 
  
 
  
  
 
  
 
  
  
  
 
  
  
 
  
 
  
  
 
  
 
  
  
 
  
 
  
  
 
  
 
  
  
 
  
 
  
  
 
  
 
  
  
 
  
 
  
  
 
  
 
  
  
 
  
 
  
  
  
 
  
 
  
  
 
  
 
  
  
 
  
 
/s/  William R. Stensrud 
William R. Stensrud 

   Director

106  

February 25, 2011

 
 
  
  
 
  
 
  
  
 
  
 
Table of Contents 

Juniper Networks, Inc. 

Schedule II - Valuation and Qualifying Account 
Years Ended December 31, 2010, 2009, and 2008 

Year ended December 31, 2010 

Allowance for doubtful accounts 

Sales returns reserve 
Year ended December 31, 2009 

Allowance for doubtful accounts 

Sales returns reserve 
Year ended December 31, 2008 

Allowance for doubtful accounts 

Sales returns reserve 

Balance at Beginning 
of Year 

Charged to 
(Reversed from) 
Costs and Expenses

Recoveries 
(Deductions), Net 

Balance at End of 
Year 

(In millions) 

$

$

$

$

$

$

9.1    $

45.6    $

9.7    $

36.8    $

8.3    $

25.1    $

107  

1.2 

  $ 

(0.2 )   $

104.4 

  $ 

(97.2 )   $

(0.6 )   $ 

84.1 

  $ 

1.7 

  $ 

89.0 

  $ 

— 

  $

(75.3 )   $

(0.3 )   $

(77.3 )   $

10.1 

52.8 

9.1 

45.6 

9.7 

36.8 

 
 
 
  
  
  
 
   
 
   
   
   
   
   
  
 
 
 
  
    
  
 
  
 
  
    
  
 
  
 
  
    
  
 
  
 
  
  
  
Table of Contents 

Exhibit Index 

Exhibit No.  

Exhibit  

3.1 

3.2 

10.1 

10.2 

10.3 

10.4 

10.5 

10.6 

10.7 

10.8 

10.9 

10.10 

10.11 

10.12 

10.13 

10.14 

10.15 
10.16 
10.17 
10.18 
10.19 
10.20 
10.21 
10.22 

10.23 

Incorporation 

   Juniper Networks, Inc. Amended and Restated Certificate of 
   Amended and Restated Bylaws of Juniper Networks, Inc. 
   Form of Indemnification Agreement entered into by the Registrant with 
   Amended and Restated 1996 Stock Plan++ 
   Form of Stock Option Agreement for the Juniper Networks, Inc. 

each of its directors, officers and certain employees

Amended and Restated 1996 Stock Plan++ 

   Form of Notice of Grant and Restricted Stock Unit Agreement for the 
Juniper Networks, Inc. Amended and Restated 1996 Stock Plan++
   Juniper Networks 2000 Nonstatutory Stock Option Plan++
   Form of Option Agreement for the Juniper Networks 2000 
   Juniper Networks, Inc. 2006 Equity Incentive Plan, as amended++
   Form of Stock Option Agreement for the Juniper Networks, Inc. 2006 

Nonstatutory Stock Option Plan++ 

Equity Incentive Plan++ 

   Form of Non-Employee Director Stock Option Agreement for the 

Juniper Networks, Inc. 2006 Equity Incentive Plan++

   Form of Notice of Grant and Restricted Stock Unit Agreement for the 

Juniper Networks, Inc. 2006 Equity Incentive Plan++

   Form of Notice of Grant and Performance Share Agreement for the 

Juniper Networks, Inc. 2006 Equity Incentive Plan++

   Form of India Stock Option Agreement under the Juniper Networks, 

Inc. 2006 Equity Incentive Plan 

   Form of India Restricted Stock Unit Agreement under the Juniper 

Networks, Inc. 2006 Equity Incentive Plan 

Incentive Plan++ 

   Unisphere Networks, Inc. Second Amended and Restated 1999 Stock 
   NetScreen Technologies, Inc. 1997 Equity Incentive Plan++
   NetScreen Technologies, Inc. 2001 Equity Incentive Plan++
   NetScreen Technologies, Inc. 2002 Stock Option Plan++
   Neoteris 2001 Stock Plan++ 
   Kagoor Networks, Inc. 2003 General Stock Option Plan++
   Kagoor Networks, Inc. 2003 Israel Stock Option Plan++
   Redline Networks 2000 Stock Plan++ 
   Peribit Networks 2000 Stock Plan++ 
   Amended and Restated Juniper Networks 1999

Employee Stock Purchase Plan++ 

108  

  Filing 

  Exhibit No.  

Incorporated by Reference 
   File No.  

  File Date 

   10-K 

   3.1 

   000-26339 

   3/27/2001 

8-K

3.1

   000-34501

9/3/2010

   10-Q 

   10.1 

   000-26339 

   11/14/2003 

8-K

10.1

   000-26339

11/9/2005

   10-Q 

   10.16 

   000-26339 

   11/2/2004 

   8-K 

   10.2 

   000-26339 

   11/9/2005 

  S-8

10.1

   333-92086

7/9/2002

   10-K 

   10.6 

   000-26339 

   3/4/2005 

10-Q  

10.1

   000-34501

11/5/2010

   8-K 

   10.2 

   000-26339 

   5/24/2006 

   8-K 

   10.3 

   000-26339 

   5/24/2006 

   10-K 

   10.20 

   000-26339 

   2/29/2008 

   10-K 

   10.21 

   000-26339 

   2/29/2008 

   10-Q 

   10.2 

   000-26339 

   5/9/2008 

   10-Q 

   10.3 

   000-26339 

   5/9/2008 

   S-8 

   10.1 

   333-92090 

   7/9/2002 

  S-1+

  S-1+

  S-8

  S-8+

  S-8

  S-8

  S-8

  S-8

10.2

10.3

4.7

4.1

4.1

4.2

4.1

99.1

   333-71048
   333-71048
   333-114688
   333-110709
   333-124572
   333-124572
   333-124610
   333-126404

10/5/2001

12/10/2001

4/21/2004

11/24/2003

5/3/2005

5/3/2005

5/4/2005

7/6/2005

   10-Q 

   10.2 

   000-26339 

   8/9/2007 

 
 
 
  
 
 
 
 
 
 
 
 
 
 
 
  
  
  
 
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
Table of Contents 

Exhibit No.  
10.24 

10.25 

10.26 

10.27 

10.28 

10.29 

10.30 

10.31 

10.32 

10.33 

10.34 

10.35 

10.36 

10.37 

10.38 

10.39 

10.40 

10.41 

10.42 

10.43 

10.44 

10.45 

10.46 

Exhibit  

Plan For Employees Located in the European Economic Area

   Juniper Networks, Inc. 2008 Employee Stock Purchase Plan++
   Sub-plan to the Juniper Networks, Inc. 2008 Employee Stock Purchase 
   Juniper Networks, Inc. Deferred Compensation Plan++
   Form of Executive Officer Change of Control Agreement, as 
   Form of Executive Officer Severance Agreement, as amended++
   Option Amendment Agreement by and between the Registrant and 

amended++ 

Kim Perdikou++ 

Incorporated by Reference 

  Filing 

  Exhibit No.  

  S-8

4.3

File No. 
   333-151669

File Date 

6/16/2008

   10-K 

   10.25 

   000-26339 

   3/2/2009 

  S-8

4.4

   333-151669

6/16/2008

   10-K 

   10.27 

   000-26339 

   3/2/2009 

10-Q  

10.4

   000-26339

11/10/2008

   8-K 

   99.2 

   000-26339 

   5/2/2007 

   Severance Agreement by and between the Registrant and Robyn M. 

Denholm++ 

   Summary of Compensatory Arrangements for Certain Officers adopted 

on March 9, 2007++ 

   Summary of Compensatory Arrangements for Certain Officers 

announced on August 14, 2007++ 

   Summary of Compensatory Plans and Arrangements for Certain 

Officers adopted on February 26, 2008++ 

   Summary of Compensatory Arrangements for Certain Officers adopted 

on February 11, 2009++ 

   Summary of Compensatory Arrangements for Certain Officers adopted 

on March 2, 2009++ 

   10-K 

   10.33 

   000-26339 

   3/2/2009 

   8-K 

   99.1 

   000-26339 

   3/12/2007 

   8-K 

Item 5.02 

   000-26339 

   8/14/2007 

   8-K 

   99.1 

   000-26339 

   2/28/2008 

   8-K 

Item 5.02 

   000-26339 

   2/18/2009 

   8-K 

Item 5.02 

   000-26339 

   3/6/2009 

on November 12, 2009++ 

   Summary of Compensatory Arrangements for Certain Officers adopted 
   Offer Letter by and between Juniper Networks, Inc. and John Morris++  
   Employment Agreement by and between Juniper Networks, Inc. and 

Kevin Johnson++ 

   8-K 

Item 5.02 

   001-34501 

   11/18/2009 

10-Q  

10.1

   000-26339

11/10/2008

   10-Q 

   10.2 

   000-26339 

   11/10/2008 

   Offer Letter by and between Juniper Networks, Inc. and Michael J. 

Rose++ 

   Tolling Agreement by and between Juniper Networks, Inc. and Scott 

Kriens++ 

   Agreement for ASIC Design and Purchase of Products between IBM 

Microelectronics and the Registrant dated August 26, 1997

Amendment One dated January 5, 1998 to Agreement for ASIC Design 
and Purchase of Products between IBM Microelectronics and the 
Registrant dated August 26, 1997 
Amendment Two dated March 2, 1998 to Agreement for ASIC Design 
and Purchase of Products between IBM Microelectronics and the 
Registrant dated August 26, 1997 

   Lease between Mathilda Associates LLC and the Registrant dated 

June 18, 1999 

   Lease between Mathilda Associates LLC and the Registrant dated 

February 1, 2000 

   Lease between Mathilda Associates II LLC and the Registrant dated 

August 15, 2000 

   10-K 

   10.38 

   000-26339 

   3/2/2009 

   10-Q 

   10.3 

   000-26339 

   11/10/2008 

   S-1 

   10.8 

   333-76681 

   6/18/1999 

   S-1 

   10.8.1 

   333-76681 

   4/23/1999 

   S-1 

   10.8.2 

   333-76681 

   4/23/1999 

   S-1 

   10.10 

   333-76681 

   6/23/1999 

   10-K 

   10.9 

   000-26339 

   3/27/2001 

   10-Q 

   10.15 

   000-26339 

   11/2/2004 

109  

 
 
 
 
 
 
 
 
 
 
 
 
 
  
  
  
 
  
  
 
 
 
 
 
 
 
  
  
  
  
 
  
  
  
  Filing 

  Exhibit No.  

File No. 

File Date 

Incorporated by Reference 

   10-K 

   10.47 

   000-34501 

   2/26/2010 

   10-K 

   10.48 

   000-34501 

   2/26/2010 

   10-K 

   10.49 

   000-34501 

   2/26/2010 

   10-K 

   10.50 

   000-34501 

   2/26/2010 

   10-K 

   10.51 

   000-34501 

   2/26/2010 

  S-8

  4.3

   333-166248

  4/23/2010

   S-8 

   10.1 

   333-171299 

   12/12/2010 

   10-Q 

   10.2 

   000-34501 

   11/5/2010 

   10-Q 

   10.3 

   000-34501 

   11/5/2010 

Table of Contents 

Exhibit No.  

Exhibit  

10.47 

10.48 

10.49 

10.50 

 10.51 

10.52 

10.53 

10.54 

10.55 

21.1 
23.1 
24.1 

31.1 

31.2 

32.1 

32.2 

101 

   First Amendment to Lease between Sunnyvale Office Park, L.P. and 

the Registrant dated January 24, 2002 

   First Amendment to Lease between Sunnyvale Office Park, L.P. and 

the Registrant dated February 28, 2000 

   First Amendment to Lease between Sunnyvale Office Park, L.P. and 

the Registrant dated October 14, 2009 

   Second Amendment to Lease between Sunnyvale Office Park, L.P. and 

the Registrant dated October 14, 2009 

   Amendment No. 2 to Lease between Sunnyvale Office Park, L.P. and 

the Registrant dated October 14, 2009 
   Ankeena Networks, Inc. 2008 Stock Plan++ 
   Altor Networks, Inc. 2007 Stock Plan and 2009 Israeli Equity Incentive 

Sub Plan++ 

   Australian Addendum to the Juniper Networks, Inc. 2006 Equity 

Incentive Plan, as amended++ 

Stock Purchase Plan, as amended++ 

   Australian Addendum to the Juniper Networks, Inc. 2008 Employee 
   Subsidiaries of the Company* 
   Consent of Independent Registered Public Accounting Firm*

 Power of Attorney (see page 106) 

   Certification of Chief Executive Officer pursuant to Rule 13a-14(a) of 

the Securities Exchange Act of 1934* 

   Certification of Chief Financial Officer pursuant to Rule 13a-14(a) of 

the Securities Exchange Act of 1934* 

   Certification of the Chief Executive Officer pursuant to Section 906 of 

the Sarbanes-Oxley Act of 2002** 

   Certification of the Chief Financial Officer pursuant to Section 906 of 

the Sarbanes-Oxley Act of 2002** 
The following materials from Juniper Networks Inc.'s Annual Report 
on Form 10-K for the year ended December 31, 2010, formatted in 
XBRL (Extensible Business Reporting Language): (i) the Consolidated 
Statements of Operations, (ii) the Consolidated Balance Sheets, and 
(iii) the Consolidated Statements of Cash Flows, and (iv) Notes to 
Consolidated Financial Statements, tagged as blocks of text

101.INS 
101.SCH 
101.CAL 
101.DEF 
101.LAB 
101.PRE 

   XBRL Instance Document 
   XBRL Taxonomy Extension Schema Document
   XBRL Taxonomy Extension Calculation Linkbase Document
   XBRL Taxonomy Extension Definition Linkbase Document
   XBRL Taxonomy Extension Label Linkbase Document
   XBRL Taxonomy Extension Presentation Linkbase Document

*     Filed herewith 

**    Furnished herewith 

+    Filed by NetScreen Technologies, Inc. 

++    Indicates management contract or compensatory plan, contract or arrangement.

 
 
 
 
 
 
 
 
 
 
 
 
 
  
  
  
 
  
  
 
 
 
 
 
  
  
 
 
 
 
 
 
  
  
 
 
  
 
 
 
 
  
  
 
 
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
 
 
 
 
  
  
 
 
 
 
 
 
  
  
 
 
 
 
 
 
  
  
 
 
 
 
 
 
  
  
 
 
 
 
 
 
  
  
 
 
 
 
 
 
  
  
 
 
  
  
 
 
 
  
     
  
     
  
     
  
110  

 
 
SUBSIDIARIES OF THE COMPANY AS OF DECEMBER 31, 2010* 

NAME 

Juniper Networks (Cayman) Limited 
Juniper Networks Ireland 
Juniper Networks (Hong Kong), Ltd. 
Juniper Networks (US), Inc. 
____________ 

EXHIBIT 21.1 

JURISDICTION OF
INCORPORATION

Cayman Islands
Ireland
Hong Kong
California, USA

*    All other subsidiaries would not in the aggregate constitute a “significant subsidiary” as defined in Regulation S-X. 

 
 
 
  
  
  
 
 
  
  
  
  
CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM 

We  consent  to  the  incorporation  by  reference  in  the  following  Registration  Statements  (Form  S-8  Nos.  333-171299,  333-168734, 
333-166248, 333-151669, 333-141211, 333-126404, 333-124610, 333-124572, 333-114688, 333-92086, 333-92088, 333-92090, 333-85387, 
333-32412, 333-44148, 333-52258, 333-57860, 333-57862, 333-57864, and 333-75770 and Form S-3 No. 333-168733) of Juniper Networks, 
Inc. of our reports dated February 25, 2011, with respect to the consolidated financial statements and schedule of Juniper Networks, Inc., and 
the effectiveness of internal control over financial reporting of Juniper Networks, Inc., included in this Annual Report (Form 10-K) of Juniper 
Networks, Inc., for the year ended December 31, 2010. 

Exhibit 23.1 

/s/ Ernst & Young LLP 

San Jose, California 
February 25, 2011 

 
 
 
  
  
  
  
  
  
  
  
EXHIBIT 31.1 

I, Kevin R. Johnson, certify that: 

1.    I have reviewed this Annual Report on Form 10-K of Juniper Networks, Inc.; 

CERTIFICATION 

2.    Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to 
make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period 
covered by this report; 

3.    Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material 
respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report; 

4.    The registrant's other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as 
defined  in  Exchange  Act  Rules  13a-15(e)  and  15d-15(e))  and  internal  control  over  financial  reporting  (as  defined  in  Exchange  Act  Rules 
13a-15(f) and 15d-15(f)) for the registrant and have: 

(a)    Designed  such  disclosure  controls  and  procedures,  or  caused  such  disclosure  controls  and  procedures  to  be  designed  under  our 
supervision,  to  ensure  that  material  information  relating  to  the  registrant,  including  its  consolidated  subsidiaries,  is  made  known  to  us  by 
others within those entities, particularly during the period in which this report is being prepared; 

(b)    Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our 
supervision,  to  provide  reasonable  assurance  regarding  the  reliability  of  financial  reporting  and  the  preparation  of  financial  statements  for 
external purposes in accordance with generally accepted accounting principles; 

(c)    Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the 
effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and 

(d)    Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most 
recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to 
materially affect, the registrant's internal control over financial reporting; and 

5.    The  registrant's  other  certifying  officer(s)  and  I  have  disclosed,  based  on  our  most  recent  evaluation  of  internal  control  over  financial 
reporting,  to  the  registrant's  auditors  and  the  audit  committee  of  the  registrant's  board  of  directors  (or  persons  performing  the  equivalent 
functions): 

(a)    All  significant  deficiencies  and  material  weaknesses  in  the  design  or  operation  of  internal  control  over  financial  reporting  which  are 
reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and 

(b)    Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal 
control over financial reporting. 

Date: February 25, 2011 

/s/ Kevin R. Johnson       
Kevin R. Johnson 
Chief Executive Officer 

 
 
 
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
EXHIBIT 31.2 

I, Robyn M. Denholm, certify that: 

1.    I have reviewed this Annual Report on Form 10-K of Juniper Networks, Inc.; 

CERTIFICATION 

2.    Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to 
make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period 
covered by this report; 

3.    Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material 
respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report; 

4.    The registrant's other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as 
defined  in  Exchange  Act  Rules  13a-15(e)  and  15d-15(e))  and  internal  control  over  financial  reporting  (as  defined  in  Exchange  Act  Rules 
13a-15(f) and 15d-15(f)) for the registrant and have: 

(a)    Designed  such  disclosure  controls  and  procedures,  or  caused  such  disclosure  controls  and  procedures  to  be  designed  under  our 
supervision,  to  ensure  that  material  information  relating  to  the  registrant,  including  its  consolidated  subsidiaries,  is  made  known  to  us  by 
others within those entities, particularly during the period in which this report is being prepared; 

(b)    Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our 
supervision,  to  provide  reasonable  assurance  regarding  the  reliability  of  financial  reporting  and  the  preparation  of  financial  statements  for 
external purposes in accordance with generally accepted accounting principles; 

(c)    Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the 
effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and 

(d)    Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most 
recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to 
materially affect, the registrant's internal control over financial reporting; and 

5.    The  registrant's  other  certifying  officer(s)  and  I  have  disclosed,  based  on  our  most  recent  evaluation  of  internal  control  over  financial 
reporting,  to  the  registrant's  auditors  and  the  audit  committee  of  the  registrant's  board  of  directors  (or  persons  performing  the  equivalent 
functions): 

(a)    All  significant  deficiencies  and  material  weaknesses  in  the  design  or  operation  of  internal  control  over  financial  reporting  which  are 
reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and 

(b)    Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal 
control over financial reporting. 

Date: February 25, 2011 

/s/ Robyn M. Denholm       
Robyn M. Denholm 
Executive Vice President and Chief Financial Officer 

 
 
 
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
Certification of Chief Executive Officer 
Pursuant to 18 U.S.C. Section 1350 As Adopted 
Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 

Exhibit 32.1 

I, Kevin R. Johnson, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that 
the  Annual  Report  of  Juniper  Networks,  Inc.  on  Form  10-K  for  the  fiscal  year  ended  December  31,  2010,  fully  complies  with  the 
requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 and that information contained in such Annual Report on Form 
10-K fairly presents, in all material respects, the financial condition and results of operations of Juniper Networks, Inc. 

/s/ Kevin R. Johnson       
Kevin R. Johnson 
Chief Executive Officer 
February 25, 2011 

 
 
 
  
  
  
  
  
  
  
Certification of Chief Financial Officer 
Pursuant to 18 U.S.C. Section 1350 As Adopted 
Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 

Exhibit 32.2 

I, Robyn M. Denholm, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, 
that  the  Annual  Report  of  Juniper  Networks,  Inc.  on  Form  10-K  for  the  fiscal  year  ended  December  31,  2010,  fully  complies  with  the 
requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 and that information contained in such Annual Report on Form 
10-K fairly presents in all material respects the financial condition and results of operations of Juniper Networks, Inc. 

/s/ Robyn M. Denholm       
Robyn M. Denholm 
Executive Vice President and Chief Financial Officer 
February 25, 2011