A group of communications networks managed by several commercial companies that provide the major high-speed links across the country. ISPs are either connected directly to these backbones or to a larger regional ISP that is connected to one. The backbones themselves are interconnected at various access points called "NAPs." The major backbone providers include Qwest, Level 3 Communications, AT&T, Sprint/Nextel, SAVVIS and British Telecom. See NAP.

Download Computer Desktop Encyclopedia to your PC, iPhone or Android.

THIS DEFINITION IS FOR PERSONAL USE ONLY.
All other reproduction is strictly prohibited without permission from the publisher.
© 1981-2012 The Computer Language Company Inc.  All rights reserved.