'Denial of Service' Hackattacks Last Week Degraded Internet

‘Denial of Service’ HackAttacks Last Week Degraded Internet Performance Overall According toKeynote Submitted by: Marketing Projects (Chester and London) Monday, 14 February 2000

San Mateo, California, February 14, 2000 - The performance of the Internet overall degraded by as much as 26.8 percent during business hours due to last week’s denial of service attacks, according to measurements taken by Keynote (Nasdaq:KEYN), the Internet performance authority, across the US. Overall Internet performance for users accessing web sites degraded on Monday, February 7 and Tuesday, February 8 compared to performance the previous week. Average performance on Wednesday, February 9 degraded by 26.8 percent, attributable in part to increased traffic on the World Wide Web looking for news and other information about the attacks, as well as to the increased traffic and congestion generated by the attacks themselves. Keynote’s data verifies that performance deterioration was widespread for users around the Internet and affected many web sites that were not direct targets of the attacks. Comparisons are based on the Keynote Business 40 Index, an industry-standard benchmark of the overall performance of the Internet as measured from U.S. locations during business hours. The Keynote Business 40 Index includes three of the sites that experienced denial of service attacks: Yahoo!, ZDNet and Excite. The following table compares last week’s performance to the previous week’s. Overall Internet performance degradation: Date / Performance (in seconds) / Change from previous week / Performance previous week (in seconds) February 7 / 5.98 / 5.7% / slower / 5.66 February 8 / 5.96 / 7.8% / slower / 5.53 February 9 / 6.67 / 26.8% / slower / 5.26 February 10 / 4.86 / 2.2% / faster / 4.97 The following table lists the web sites that experienced denial of service attacks, the benchmark speed and availability for the site before the attack, the time (Pacific Standard Time) that problems began, and the time reasonable service was restored. Keynote’s denial of service report for targeted web sites: Date Web Site / Benchmark Speed (in seconds) / Availability / Time of First Trouble / Return to Reasonable Service / time of day / speed (seconds) / availability

Page 1 Feb 7 Yahoo! / 1.71 / 98.5% / 10:15 / 14:45 / 1.08 / 98.5% Feb 8 Buy.com / 9.15 / 96.9% / 10:00 / 15:00 / 5.71 / 87.9% eBay * / 6.04 / 98.5% / 14:30 / 19:30 / 29.70 / 88.7% CNN / 6.12 / 96.9% / 16:00 / 20:15 / 8.60 / 98.4% Amazon.com / 5.11 / 98.5% / 17:00 / 20:45 / 7.71 / 80.0% Feb 9 ZDNet / 4.19 / 98.5% / 04:00 / 07:30 / 7.21 / 95.4% E*Trade / 2.31 / 98.5% / 05:00 / 08:45 / 6.16 / 98.4% Excite / 3.54 / 98.5% / 18:45 / 21:00 / 2.75 / 98.4% * From 18:00 until 19:15, eBay experienced problems with one of its graphics servers , causing Keynote measurement computers and visitors to www.ebay.com to download a web page without graphics. Note to press and analysts: Keynote is announcing the set-up of its European operations. If you would like an in-depth interview with Olivier Carron, VP Europe in Paris or Roger Higgins, VP Strategy & International in London please contact 0385 395705. About the Keynote Business 40 Index The Keynote Business 40 Internet Performance Index is the average response time of accessing and downloading the home pages of 40 important business web sites as measured Monday through Friday every 15 minutes during business hours from 66 Internet access points in 25 metropolitan areas around the United States, a subset of Keynote’s global network of measurement computers in over 120 locations around the world. How Keynote Measures Quality of Service

Page 2 The Keynote Perspective service profiles the complete user experience of executing interactive multi-page transactions, such as buying merchandise or making a travel reservation, and downloading content, including graphics and banner ads, from World Wide Web sites to multiple locations around the world. The service supports industry-standard HTTP and secure HTTPS, the same protocols used by the Microsoft (Nasdq:MSFT) and Netscape (Nasdaq:AOL) web browsers. The measurements can be performed every 15 minutes around the clock from each of Keynote’s automated measurement locations which are connected to the Internet via T-1 or T-3 communication lines. Performance results and availability rates for measured web sites, for a popular Site-of-the-Week and for the Keynote Business 40 Index are available in real time via MyKeynote software to anyone with a web browser. Keynote Perspective also provides daily quality-of-service summary reports by email as well as an alarm service that notifies subscribers by pager or email of outages or deteriorations in quality of service. About Keynote Keynote is the leading provider of Internet performance measurement, diagnostic and consulting services to companies that operate e-commerce web sites. The company markets Keynote Perspective, Consumer Perspective and Keynote Lifeline, global real-time services that measure, assure and improve the Quality of Service of e-commerce web sites around the world. The company captures over 16 million performance measurements daily using Keynote's global infrastructure of more than 300 measurement computers connected to the major Internet backbones in over 120 statistically selected locations across 50 metropolitan areas worldwide. Internet performance and availability data are collected at Keynote’s sophisticated operations center and are instantly available to customers through any web browser. Keynote customers include over 700 leading e-commerce web sites and hosting companies including AdForce (Nasdaq:ADFC), Amazon.com (Nasdaq:AMZN), CDNow (Nasdaq:CDNW), Compaq Computer (NYSE:CPQ), Cisco Systems (Nasdaq:CSCO), Dell Computer (Nasdaq:DELL), Digex (Nasdaq:DIGX), DoubleClick (Nasdaq:DCLK), Exodus Communications (Nasdaq:EXDS), Microsoft (Nasdaq:MSFT), National Semiconductor (NYSE:NSM), and SABRE Holdings (NYSE:TSG). For further information about Keynote, visit the Keynote web site at http://www.keynote.com. NOTE: To request further information or an interview, press and analysts should call 0385 395705. Keynote, Perspective, Consumer Perspective, MyKeynote, Lifeline and The Internet Performance Authority are trademarks of Keynote Systems, Inc. Other trademarks are the property of their respective owners.

Page 3 Editorial Contacts: Jane Harrad-Roberts Marketing Projects PR 0385 395705 [email protected] Olivier Carron de la Carrière VP Europe +33 15660 5313 [email protected]

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