Page 755 - (ISC)² CISSP Certified Information Systems Security Professional Official Study Guide

FIGURE 11.5 Comparing the OSI model with the TCP/IP model

The TCP/IP model’s Application layer corresponds to layers 5, 6, and 7
of the OSI model. The TCP/IP model’s Transport layer corresponds to
layer 4 from the OSI model. The TCP/IP model’s internet layer
corresponds to layer 3 from the OSI model. The TCP/IP model’s Link
layer corresponds to layers 1 and 2 from the OSI model.

It has become common practice (through confusion,

misunderstanding, and probably laziness) to also call the TCP/IP
model layers by their OSI model layer equivalent names. The TCP/IP
model’s Application layer is already using a name borrowed from the
OSI, so that one is a snap. The TCP/IP model’s Host-to-Host layer is