TCP/IP Services
TCP/IP is most often studied in terms of its layer-based architecture and the protocols that it provides at those different layers. These protocols, however, represent the technical details of how TCP/IP works. They are of interest to us as students of technology, but are normally hidden from users who do not need to see the guts of TCP/IP to know that it works. Before proceeding to these details, let's take a bigger picture look at what TCP/IP does.
In the discussion of the OSI Reference Model concepts (in Chapter 5), I mentioned that the theoretical operation of the model is based on the idea of one layer providing services to the layers above it. TCP/IP covers many layers of the OSI model, and so it collectively provides services ...
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