Page 112 - Handout Computer Network.

This means that an address must have information about the path of media connections that the
routing process uses to pass packets from a source toward a destination.

Figure 5-5 shown a Network Media Connection

Using these addresses, the network layer can provide a relay connection that interconnects
independent networks. The consistency of Layer 3 addresses across the entire internetwork also
improves the use of bandwidth by preventing unnecessary broadcasts.
Broadcasts invoke unnecessary process overhead and waste capacity on any devices or links
that do not need to receive the broadcast.

By using consistent end-to-end addressing to represent the path of media connections, the
network layer can find a path to the destination without unnecessarily burdening the devices or links
on the internetwork with broadcasts.

5.3.4 Routing Tables

To aid in the process of path determination, routing protocols build and maintain routing
tables, which contain route information, as shown in Figure 5-6. Route information varies, depending
on the routing protocol used.
Routing protocols fill routing tables with a variety of information.

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