***For Immediate Release***

Spirent Communications, cPacket Networks Partner to Offer Next Generation Network Monitoring Solutions

Mountain View, CA – November 30, 2010 – Spirent Communications has partnered with cPacket Networks to offer products for the emerging high speed data center and cloud infrastructure markets. Spirent, a leading provider of network testing and service assurance solutions, will extend its live Ethernet network testing solutions with advanced products that incorporate cPacket technology and provide real time, on the fly, traffic aggregation/de-aggregation, and advanced packet filtering.

“High speed network infrastructure, data centers, and cloud computing are growing markets in which network and service reliability are critical to ensuring user satisfaction and maintaining SLAs, are important and growth markets.” said Sean Yarborough, senior director of Strategy & Business Development at Spirent. “cPacket’s real-time inspection, monitoring, and aggregation capabilities combined with Spirent expertise in data center and cloud computing testing ensures that we are offering the best solution to address customers’ needs.”

According to Spirent, cPacket’s Pervasive Network Intelligence™ technology makes it the “best of breed” at aggregation, filtering, replication, load balancing, and real time reporting. First products resulting from this relationship are already available from Spirent.

This announcement follows a series of announcements that demonstrate cPacket’s growing momentum. Rony Kay, cPacket founder and CEO said, “We are pleased that Spirent, with its worldwide presence in network testing and monitoring solutions, has recognized the strength of cPacket’s technology and products. This collaboration helps customers address the increasing market needs for real time network visibility and performance monitoring of their networks.”

About Spirent Communications plc

Spirent Communications plc. (LSE: SPT), a global leader in test & measurement, inspires innovation within development labs, networks and IT organizations to enable customers to deploy communications networks, services & applications, and devices that enrich life. Our extensive portfolio of solutions test data centers, high speed Ethernet networks and services, 3G/4G wireless networks and devices, network security, and global navigation satellite systems. With solutions used by more than 1,700 customers in 30 countries, the world’s largest equipment manufacturers, service providers, enterprise and governments depend daily on Spirent to help ensure their success. Based in Sunnyvale, CA, Spirent Communications has 1,300 employees worldwide. For more information visit http://www.spirent.com/planet-spirent/media_room/about_spirent_communications_plc.aspx

About cPacket

cPacket Networks is an emerging leader in chips and technologies that offers breakthrough, Pervasive Network Intelligence™ at a fraction of the complexity, power, or cost of preexisting approaches. Based upon its powerful “complete packet inspection” architecture, cPacket provides manufacturers of routers, switches and other network appliances a low-impact means to easily drop game-changing, wire-speed active network traffic analysis and response directly into their existing or planned designs — whether targeted at the service providers, the enterprise, or the small office. The exploding use of 10 Gbps networks and beyond to support a relentless growth in media-centric applications makes the availability of truly pervasive network intelligence timely and critical.

cPacket was founded in 2003 and is located in Mountain View, CA. For more information, visit www.cpacket.com.

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