Chapter 3. Fundamentals of WANs and IP Routing

This chapter covers the following exam topics:

1.0 Network Fundamentals

1.1 Explain the role and function of network components

1.1.a Routers

1.2 Describe characteristics of network topology architectures

1.2.d WAN

This chapter introduces WANs and the various features of the TCP/IP network layer.

First, for WANs, note that the current CCNA blueprint does not examine WANs in detail as an end to themselves. However, to understand IP routing, you need to understand the basics of the two types of WAN links introduced in the first major section of this chapter: serial links and Ethernet WAN links. In their most basic form, these WAN links connect routers that sit at sites that can be miles to hundreds ...

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