NETSCOUT Systems to Report First Quarter Fiscal 2008 Financial Results on July 26, 2007

July 16, 2007

WESTFORD, Mass., July 16, 2007 — NetScout Systems, Inc. (NASDAQ: NTCT), the industry pacesetter for advanced network and service solutions, today announced it would report its first quarter fiscal year 2008 financial results on July 26, 2007 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: 10060718. A replay of the call will be available after 7:30 p.m. ET on July 26 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: 10060718.

A live webcast of the conference call will be available on the company's website at

About NetScout Systems

NetScout Systems, Inc. (NASDAQ: NTCT) has been the industry pacesetter for advanced network and service assurance solutions for over a decade, and counts the world's largest enterprises, government agencies, and service providers among its customers. Enterprise and government IT organizations deploy NetScout's nGenius® Performance Management System to increase service levels to their users by reducing or preventing service disruptions. Service providers depend on NetScout's proven IP performance management technology and expertise to protect the quality of their customers' experience with IP-based services. NetScout is headquartered in Westford, Massachusetts and has offices worldwide. Further information is available at

For further information, please contact:

CONTACT: NetScout Systems, Inc.
Catherine Taylor, 978-614-4286
Director, Investor Relations

SOURCE: NetScout Systems, Inc.