Overview of the End-to-End Routing Process Let's review the basic process of routing as covered in Chapter 10

Overview of the End-to-End Routing Process

Let's review the basic process of routing as covered in Chapter 10. Figure 11-1 is similar to several figures from Chapter 10, but this one has a little less clutter so that you can focus on how to get a packet from Hannah to the www.example.com web server.

Figure 11-1. Internetwork with Two Routers and Three IP Networks

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This internetwork uses three different IP network numbers, with one IP network number for each physical network. Simply put, this internetwork does not use subnetting.

note To keep things straight in this chapter, I will use the word "internetwork" to refer to the entire network shown in a figure, and the word "network" to refer to an individual physical network, such as the three separate Ethernet networks shown in Figure 11-1. Remember: You can use the word "network" in many different ways; to describe routing, using "internetwork" and "network" as described here will make the text a little more readable.

For Hannah to send a packet to the web server, a few separate steps happen:

Figure 11-1 shows each of these three steps; the next three sections of this chapter take a closer look at each.