Chapter 3. Router Interfaces

Router Interfaces

One of the main functions of a Cisco router is to connect different types of networks. Connecting Ethernet systems is quite straightforward, and connecting WAN links is just as easy, but these two very common network types simply refuse to talk to each other without an intermediary. The router allows you to treat very different physical networks as a single, continuous entity.

Cisco routers support almost any type of network interface: Ethernet, serial, token ring, DS3, OC3, asynchronous modem, and so on. These interfaces might be on add-on cards that slide into a system, much like those used in a laptop, or they might ...

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