Which two ICMPv6 messages are used in to determine the MAC address of a known IPv6 address?
The two ICMPv6 messages that are used to determine the MAC address of a known IPv6 address are Neighbor Solicitation (NS) and Neighbor Advertisement (NA).
Neighbor Solicitation (NS) is used by a node to discover the link-layer address (MAC address) of a neighbor. When a node wants to resolve the MAC address of a particular IPv6 address, it sends an NS message to the target IPv6 address. The NS message includes the link-layer address of the sender, allowing the receiver to determine the MAC address of the sender.
Neighbor Advertisement (NA) is used by a node to provide its link-layer address (MAC address) to a neighbor that has sent a Neighbor Solicitation (NS) message. In response to an NS message, the node with the corresponding IPv6 address will send an NA message back, providing its link-layer address (MAC address) to the sender.
By exchanging NS and NA messages, nodes can determine the MAC address of a known IPv6 address, enabling them to establish direct communication at the link layer. This process is essential for neighbor discovery and address resolution in IPv6 networks.
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