Describing End-to-End Communications

In this section, the switching and routing processes are integrated. The contents of the MAC and IP headers are monitored as a packet is transferred from one computer to another through the switch(es) and router(s). Because the process is slightly different (and less complicated) if the source and destination computers are in the same LAN than if they are in different LANs (or subnets), each process is given its own section.

Understanding the Local LAN Process

Using Figure 11.8, if WS 1 needs to send a packet to WS 2, the following steps will occur for each packet:

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FIGURE 11.8 Local LAN process

  1. WS 1 examines ...

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