Metromedia Fiber Network (MFN) (Nasdaq: MFNX), a provider of optical IP Internet infrastructure within key metropolitan areas domestically and internationally, will lease fiber-optic infrastructure to Computer Sciences Corporation (CSC) (NYSE: CSC) to provide clients with secure, high-speed connectivity to CSC's data centers in select cities across North America and Europe. CSC provides outsourcing information technology services.

CSC's initial installations will be completed in Houston, Tex., where one of the company's key focuses is on the energy and energy services business. By securing fiber-optic infrastructure from MFN, CSC can deliver services over a private metro-area network, and can offer new and enhanced services such as real-time data recovery and back-up, on-line storage and other bandwidth-intensive applications.

About CSC:

Computer Sciences Corporation, a consulting and IT services firms, helps clients in industry and government achieve strategic and operational results through the use of technology. For more information, visit www.csc.com.

About Metromedia Fiber Network, Inc.:

Metromedia Fiber Network, Inc., a provider of optical IP Internet infrastructure within key metropolitan areas domestically and internationally, offers virtually unlimited, unmetered metro-area communications capacity at a fixed cost. For more information, visit www.mmfn.com.