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Chapter 2
The Protocol Suite
The primary purpose of this chapter is to obtain an appreciation for the general
composition of the TCP/IP protocol suite. This can be accomplished by first
examining the International Standards Organization (ISO) Open Systems Inter-
connection (OSI) Reference Model. Although the TCP/IP protocol suite pre-
dates the ISO’s Reference Model, by examining the layering concept associated
with communications defined by that model, one can obtain a better appre-
ciation for the functioning of the TCP/IP protocol suite.
The ISO Reference Model
During the 1970s, approximately a dozen years after the development of
several popular ...