WESTFORD, Mass., January 23, 2008 — NetScout Systems, Inc. (NASDAQ: NTCT), an industry pacesetter for advanced network and service assurance solutions, today announced it would report its third quarter fiscal year 2008 financial results on February 4, 2008 after the market close, and hold its corresponding conference call at 4:30 p.m. ET.

The numbers for the conference call are (866) 701-8242 (U.S.) and (706) 634-5113 (international). The conference call ID is: 31263476. A replay of the call will be available after 7:30 p.m. ET on February 4 for approximately one week. The number for the replay is 800-642-1687 for U.S./Canada and 706-645-9291 for international callers. The conference ID is: 31263476.

A live webcast of the conference call will be available on the company's website at http://www.netscout.com/investors.

About NetScout Systems
NetScout Systems, Inc. (NASDAQ: NTCT) has been an industry leader for advanced network and service assurance solutions for over twenty years. NetScout’s breakthrough technology solutions provide trusted, comprehensive real-time and historical performance intelligence, including advanced early warnings and rapid, definitive problem analysis. These capabilities are vital to IT operators who are accountable for reducing the Mean Time to Resolution. The world’s largest enterprises, government agencies, and service providers depend upon NetScout’s nGenius and Sniffer (formerly Network General) brand solutions to assure service levels to their users by reducing or preventing disruptions and degradations.

SOURCE NetScout Systems, Inc. Contact: Catherine Taylor Director of Investor Relations NetScout Systems, Inc. 978-614-4286 IR@netscout.com (NTCT)