IPv6 will eventually replace the IPv4 Internet layer protocols in the DARPA model. IPv6 replaces:
| • | IPv4 with IPv6 IPv6 is a routable protocol that addresses, routes, fragments, and reassembles packets. |
| • | ICMP with ICMPv6 ICMPv6 provides diagnostic functions and reports errors when IPv6 packets cannot be delivered. |
| • | IGMP with MLD MLD manages IPv6 multicast group membership. |
| • | ARP with ND ND manages interaction between neighboring nodes, including automatically configuring addresses and resolving next-hop IPv6 addresses to MAC addresses. |
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