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IP Routing Fundamentals by Mark A. Sportack

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Introduction

Routing is simultaneously the most complicated function of a network and the most important. Most knowledgeable people agree that networking and routing technologies have been around about 25 years. The concept of routing actually dates back to the late 1950s, when computing was still an arcane science in its infancy. Precious few organizations had a single computer, much less multiple computers that needed to be linked together. Internetworking, the interconnection of multiple computers, was still more of a futuristic vision than a reality. This vision predicted a day when computers would be widely implemented and interconnected via a ubiquitous global internetwork: the Internet.

The challenge in building and using a global internetwork ...

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