Lesson: 11.2 IPv6 Neighbor Discovery (CCNA 1: Introduction to Networks Semester 1 of 3)

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ICMP messages are intended to provide feedback under some circumstances regarding issues relating to IP packet processing.
Both RS and RA are used for messages between IPv6-devices for dynamic address allotments.
ICMP echo request (IPv4 and IPv6) is used to test communication between hosts using echo request and echo replication messages
Traceroute (tracert) produces a list of hops which have been reached successfully along the path. .