NYSE Euronext’sbusiness performance is directly correlated with the performance of theirnetwork validating Juniper’s strategy and helping to drive

“NYSE Euronext’sbusiness performance is directly correlated with the performance of theirnetwork, validating Juniper’s strategy and helping to drive innovation for oneof the most demanding networks in the world.” By collapsing the multiple switching layers present in traditional networkarchitectures, the new simplified NYSE Euronext network design requires fewerdevices and interconnections, leading to improved efficiencies in space, power,cooling and management. Juniper Networks Data Center Infrastructure Solutionscan significantly reduce network complexity and total cost of ownership by up to52 percent in capital expenditures, up to 44 percent in power, up to 44 percentin cooling and up to 55 percent in data center rack space. The data center core designs are anchored by the EX8216 Ethernet Switch,purpose-built to deliver the wire-speed performance, low latency, carrier-classreliability and scalability to enable NYSE Euronext to consolidate networklayers and reduce capital and operational expenses across the infrastructure.The architecture uses top of rack EX2500 Ethernet Switches to provide accessconnectivity to the data centers` high-performance servers with 10GbE ports thatdeliver wire-speed throughput. NYSE Euronext also plans to leverage the advancedrouting capabilities, such as MPLS network virtualization, low-latencymulticast, advanced quality of service (QoS), and high availability of Juniper`sfamily of MX Series Ethernet Services Routers. The EX8216 and MX Series run on JUNOS® Software, a single source operatingsystem that integrates routing, switching, security and network services,offering NYSE Euronext network administrators the ability to quickly andcost-effectively keep up with changing business demands and easily customize newservices and applications. About NYSE EuronextNYSE Euronext (NYX) is the world`s most diverse exchange group, offering a broadand growing array of financial products and services in Europe and the UnitedStates that include cash equities, futures, options, exchange-traded products,bonds, market data, and commercial technology solutions. With over 8,000 listedissues globally, NYSE Euronext’s equities markets — the New York StockExchange, Euronext, NYSE Arca, and NYSE Amex — represent nearly 40% of theworld’s cash equities trading volume, the most liquidity of any global exchangegroup.

NYSE Euronext also operates NYSE Liffe, the leading European derivativesbusiness and the world`s second largest derivatives business by value oftrading. NYSE Euronext offers comprehensive global commercial technology,connectivity, and market data products and services through its innovativetrading solutions unit, NYSE Technologies. NYSE Euronext is part of the S&P 500index and the only exchange operator in the S&P 100 index. For more information,please visit: About Juniper NetworksJuniper Networks, Inc is the leader in high-performance networking. Juniperoffers a high-performance network infrastructure that creates a responsive andtrusted environment for accelerating the deployment of services and applicationsover a single network This fuels high-performance businesses. Additionalinformation can be found at Juniper Networks, JUNOS, and the Juniper Networks logo are registered trademarksof Juniper Networks, Inc in the United States and other countries.

All othertrademarks, service marks, registered trademarks, or registered service marksare the property of their respective owners.Cautionary Note Regarding Forward-Looking StatementsThis press release contains forward-looking statements, includingforward-looking statements within the meaning of the Private SecuritiesLitigation Reform Act of 1995. Such forward-looking statements include, but arenot limited to, statements concerning NYSE Euronext`s and Juniper Networks`plans, objectives, expectations and intentions and other statements that are nothistorical or current facts. Forward-looking statements are based on NYSEEuronext`s and Juniper Networks` current expectations and involve risks anduncertainties that could cause actual results of either NYSE Euronext or JuniperNetworks to differ materially from those expressed or implied in suchforward-looking statements. Factors that could cause NYSE Euronext`s or JuniperNetworks` results to differ materially from current expectations include, butare not limited to: NYSE Euronext`s or Juniper Networks` ability to implementtheir respective strategic initiatives, alteration or cancellation of currentproduct deployment plans, economic, political and market conditions andfluctuations, government and industry regulation, interest rate risk and U.S.and global competition, and other factors detailed in NYSE Euronext`s referencedocument for 2007 (“document de référence”) filed with the French Autorité desMarchés Financiers (Registered on May 15, 2008 under No R.