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Chapter 9: Introduction to IP Routing > The IP Routing Process
The IP routing process is actually pretty simple, and it doesn’t change, regardless of the size of your network. I’m going to use Figure 9-2 to give you a picture of this step-by-step process. The question I’m asking is this: What happens when Host_A wants to communicate with Host_B on a different network? I’ll go through how to answer that question by breaking down the process with headings to make it easier to understand. First, check out Figure 9-2.
Figure 9-2: IP routing example using two hosts and one router
Okay—here you can see that a user on Host_A pings Host_B’s IP address. Routing doesn’t get any simpler than this, but it still involves a lot of steps. Let’s work through them.
A packet is created on the host:
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