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TCP/IP Guide by Charles M. Kozierok

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ICMPv6 Neighbor Advertisement and Neighbor Solicitation Messages

The previous section described the Router Advertisement and Router Solicitation messages, which are used to facilitate host–Router Discovery functions as part of the IPv6 ND protocol. The other main group of tasks for which ND is responsible relates to the exchange of information between neighboring hosts on the same network. I call these host-host communication or host-host discovery functions.

Arguably, the most important additions to the ND protocol are the functions that formalize the exchange of parameters and the methods that determine the existence of neighboring hosts. These tasks include the new method of address resolution in IPv6 as well as the processes of next-hop determination ...

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