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TCP/IP Guide by Charles M. Kozierok

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ICMPv4 Router Advertisement and Router Solicitation Messages

In Chapter 23, which described IP routing fundamentals, I discussed a critical aspect of IP internetwork design: the difference between the roles of a router and the roles of a host with regard to routing. Routers are charged with the job of routing datagrams, and therefore, of knowing routes and exchanging route information. Hosts generally do not know a great deal about routes; they rely on routers to convey datagrams intended for destinations outside the local network.

This dependence means that before a host can really participate on an internetwork, it needs to know the identity of at least one router on the local network. One way to ensure that this is the case is to just manually ...

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