WESTFORD, Mass., November 2, 2006 – NetScout Systems, Inc. (NASDAQ: NTCT), a leading provider of application and network performance management solutions, today announced that it has been named to Software Magazine’s 2006 Software 500 List, ranking #204 overall and first in the dedicated performance monitoring category. This is the magazine's 24th annual ranking of the world's largest software and services companies. NetScout ranked #236 last year. The jump in standing is attributed to a strong revenue increase of 19% from last year.

“We’re honored to once again be included alongside such strong performers in the software industry,” said Anil Singhal, founder, president and CEO of NetScout. “This is further proof that in an increasingly virtualized IT environment, the need for automated, early problem detection, and rapid resolution solutions to assure business services is becoming more and more urgent.”

About NetScout Systems
NetScout Systems, Inc. (NASDAQ: NTCT) is a market leader and pioneer of integrated application and network performance management products and solutions that help IT organizations assure critical business services across the enterprise. More than 3000 leading companies and government organizations worldwide have deployed NetScout's nGenius® Performance Management System to increase their return on infrastructure investments by optimizing the performance of networks and applications according to business priorities. NetScout is headquartered in Westford, Massachusetts and has offices worldwide. Further information is available at http://www.netscout.com.