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OSPF and IS-IS: Choosing an IGP for Large-Scale Networks by Jeff Doyle

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12.1. IPv6: An Overview

In its infancy, what we now call the Internet was a research and development network; Chapter 1 tells the story of these early years. There was little if any expectation that this internetworking of academic, military, and corporate networks would have the phenomenal commercial success it has since enjoyed. As a result, great blocks of IP addresses were taken by universities, companies, and government organizations involved in this internetwork with the assumption that the IPv4 address space was fairly inexhaustible. The vast majority of those early address allocations were made in the United States, where most of the early research and development was taking place.

You know the rest of the story. Many university students ...

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