The TCP/IP Protocol Layers
Figure 2.1 shows the TCP/IP protocol suite in relationship to the OSI reference model. The network interface layer, which corresponds to the OSI physical and data link layers, is not really part of the specification. However, it has become a de facto layer either as shown in Figure 2.1 or as separate physical and data link layers. It is described in this section in terms of the OSI physical and data link layers.
Figure 2.1. The TCP/IP protocol suite.
The physical layer contains the protocols relating to the physical medium on which TCP/IP will be communicating. Officially, the protocols of this layer fall ...
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