Network Services
At this point, it is important for you to understand some security services available on networks. Each of these services is fully discussed later in this book. The following services are discussed within this chapter in a general manner. There is overlap among these services; for example, basic authentication services are included on all Cisco routers. Therefore, this section should be referred to only for general guidelines.
Router Services
Routers have two general ways of providing security services on a network. The first is through routing. If, for example, the administrator does not want any user to be able to send or receive from a given network, the administrator can simply set a static route for that network to go to ...
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