Chapter 1. TCP/IP Review

This chapter covers the following subjects:

• TCP/IP Protocol Layers

• IP Packet Header

• IPv4 Addresses

• Address Resolution Protocol (ARP)

• Internet Control Message Protocol (ICMP)

• Host-to-Host Layer

TCP/IP Review

Given that the title of this book is Routing TCP/IP, it is fitting to begin with a review of TCP/IP before getting into how to route it. Presumably, if you are preparing for a Cisco Certified Internetwork Expert (CCIE) examination, or have just bought this book as a routing reference, you already know most or all of the information in this chapter. But reviews never hurt and sometimes help, so here you have it.

The purpose of this chapter is to review the protocols that enable, control, or contribute to ...

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