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Cisco® Networking All-in-One For Dummies® by Edward Tetz

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Chapter 2: Cozying Up to Routing Basics

In This Chapter

check.png Examining where routers fit into the OSI model

check.png Enabling routing on your network

check.png Implementing the DHPC service on your router

In this chapter, I discuss the main purpose of routers and where they fit into your overall physical network infrastructure and, of course, into our old friend, the OSI model. The single main function that routers have in the network world is to move data, so much of this chapter surrounds the fact that data movement is the main goal.

Though routers are excellent in the data movement, they are capable of providing other services for the networks on which they reside. As part of these services, I also show that routers are capable of fulfilling many other network roles, by having you walk through configuring the router to act as a DHCP server for your network.

Of Routers and Routing

When you read Book III, you see how a switch is used to break a collision domain into smaller units, reducing the number of collisions that occur on a network. By reducing the collisions, you increase throughput of busy networks, because network devices do not have to repeatedly retransmit data. This situation, however, does ...

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