Bang Networks Selects SiteSmith to Accelerate the Deployment of the World's First Real-Time Routing Network.

Business Editors/High Tech Writers

SANTA CLARA, Calif.--(BUSINESS WIRE)--April 2, 2001

SiteSmith, Inc., a subsidiary of Metromedia Fiber Network (NASDAQ: MFNX) and a leading provider of managed Internet infrastructure services, will deploy and monitor Bang Networks' (www.bangnetworks.com) first-of-its-kind, intelligent routing network, enabling real-time information to reach millions of end-users through simultaneous connections.

Bang Networks selected SiteSmith because it offers a quality, comprehensive service that is flexible enough to meet the demands of a growing, cutting-edge network. SiteSmith creates solutions that enable Bang Networks to easily expand its network ahead of customer demand. Additionally, SiteSmith's monitoring and security services maintain the network and ensure uptime 24x7, which is crucial to Bang Networks' customer service.

"We selected SiteSmith because the company has developed an excellent reputation for deploying and managing reliable, scaleable and secure Internet infrastructures," said Bang Networks founder and CTO, Tim Tuttle. "SiteSmith has enabled us to scale at an incredible rate, allowing our network to be both powerful and flexible."

Launched today (see related release at www.bangnetworks.com), Bang Networks has built a global, intelligent routing network designed to bypass the inherent limitations of the Web. It does so by maintaining persistent connections with millions of browsers and Web-based applications, thus allowing the most current information available to flow continuously and directly to users. Additionally, the Bang Networks services reduce customers' bandwidth usage and server strain by selectively updating only the information that changes (e.g., stock quotes or auction prices) when it changes, eliminating the need to reload entire pages.

"SiteSmith's technology and services enable companies like Bang Networks to focus on their core business instead of allocating resources to create, deploy and manage the network infrastructure," said Mark Spagnolo, CEO and chairman of SiteSmith. "After working with us to establish a reliable and scaleable infrastructure, Bang Networks has the foundation in place to offer real-time capabilities to its customers."

About Metromedia Fiber Network, Inc.

Metromedia Fiber Network, Inc., the leader in deployment of optical IP Internet infrastructure within key metropolitan areas domestically and internationally, is revolutionizing the fiber-optic industry. By offering virtually unlimited, unmetered metro-area communications capacity at a fixed cost, Metromedia Fiber Network is eliminating the bandwidth barrier and redefining the way broadband capacity is sold.

MFN's optical network enables its customers to implement the latest data, video, Internet and multimedia applications. Through its subsidiaries AboveNet Communications, Inc., the architect of the Internet Service Exchange (ISX), PAIX.net, Inc., the first and leading neutral Internet exchange, and SiteSmith, a leader in delivering comprehensive Internet infrastructure managed services, MFN is a leading provider of Internet connectivity, co-location and managed services solutions for high-bandwidth and business-critical applications. The Company offers a world-class network that provides co-location services and Internet connectivity for content providers, ISPs and application service providers. Its global optical Internet uses open peering and "best exit" technology to deliver fast, scaleable and reliable connections to the Internet, and improves the Internet experience for end-users.

For more information on AboveNet and its service offering visit the company's Web site at www.above.net. For more information about PAIX.net, Inc., visit the company's Web site at www.paix.net. For more information about SiteSmith, visit the company's Web site at www.sitesmith.com. For more information about Metromedia Fiber Network, please visit the company's Web site at www.mmfn.com.

MFN Statement Under the Private Securities Litigation Reform Act 

This news release contains forward-looking statements that involve risks and uncertainties. Factors that could cause or contribute to such risks and uncertainties include, but are not limited to, general economic and business conditions, competition, changes in technology and methods of marketing, and various other factors beyond the Company's control. This also includes such factors as are described from time to time in the SEC reports filed by Metromedia Fiber Network, including the most recently filed Forms S-3 and 10-Q, and its annual report on Form 10-K for the year ended December 31, 2001, which will be filed shortly.