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F5 Outpaces All Competitors with Dramatic Market Share Gain

F5's Layer 4/7 growth attributed to Application Delivery features not available in competitors' products

F5 Networks, Inc. (NASDAQ: FFIV), the global leader in Application Delivery Networking, today announced that it achieved the number one position with the largest market share gain worldwide over any other competitor in the Layer 4/7 Total Fixed and Modular Market, according to the recent Q1 2006 Dell'Oro Group report1. F5's quarter-over-quarter market share gain was 3.8 percent, comprising 35 percent of the total market. The majority of F5's key competitors declined over the same period, most notably Cisco which decreased nearly 3 percent. According to the report, the 'Other' category, which includes Citrix/NetScaler's Application Switch, grew less than 1 percent.

F5's growth can be attributed to Application Delivery functions such as the BIG-IP product's TMOS architecture, which delivers the only full IP application proxy, iRules programming language, TCP Express and iControl application integration interface. These functions give enterprises the flexible network architecture they need and require to successfully deliver all applications to all users.

"F5 is pleased that we've taken the No. 1 market share position, according to The Dell'Oro Group, and diminish any doubt that F5 continues to be the industry leader in the Application Delivery Networking Market," said Dan Matte, SVP of Marketing at F5 Networks. "There's a lot of market noise and exaggerated positioning by vendors in this space. That's why we value research of this nature that helps to provide an accurate picture of what's really going on in the market place."

1 Switched Ethernet Layer 4/7 Modular and Fixed, Server Load Balancing Market Share Report, Dell'Oro Group, May 17, 2006.

About F5 Networks

F5 Networks is the global leader in Application Delivery Networking. F5 provides solutions that make applications secure, fast, and available for everyone, helping organizations get the most out of their investment. By adding intelligence and manageability into the network to offload applications, F5 optimizes applications and allows them to work faster and consume fewer resources. F5's extensible architecture intelligently integrates application optimization, protects the application and the network, and delivers application reliability - all on one universal platform. The company is headquartered in Seattle, Washington with offices worldwide. Additional information about F5 is available on the company's website ( and in its SEC filings.

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