Part I. Internet Routing Overview

In Part I, we lay the groundwork for an examination of Internet routing. Chapter 1, Role of Routers in the Internet, introduces routing through a detailed examination of the special-purpose computers executing these protocols: the Internet’s routers. The interaction between hosts and routers, IP options, the ICMP protocol, and CIDR addressing are covered. The chapter ends with a short synopsis of the next generation of the IP protocol: IPv6.

Chapter 2, Internet Routing Protocols, begins to describe the routing protocols themselves. First, we describe a router’s routing table, which is the forwarding database that all routing protocols attempt to build. We explain the Internet’s routing architecture. The two basic ...

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