| Explanation & Hint:
The ICMPv6 message types and explain why they are not the correct answer for providing network addressing information to hosts using SLAAC, in contrast to router advertisement:
- Neighbor Solicitation: This ICMPv6 message is used in the process of neighbor discovery. It is sent by a node to determine the link-layer address (such as a MAC address) of another node on the same local network. The neighbor solicitation message is also used to verify the reachability of a neighbor after the initial discovery. It does not provide network addressing information for SLAAC.
- Neighbor Advertisement: This is a response to the neighbor solicitation message. When a node receives a neighbor solicitation message, it replies with a neighbor advertisement message, confirming its presence and link-layer address. Like neighbor solicitation, this message is involved in the neighbor discovery process, not in providing network addressing information.
- Router Solicitation: When a device initially connects to a network, it sends out a router solicitation message to prompt routers on the local network to immediately send a router advertisement, rather than waiting for their next scheduled advertisement. While this message triggers the sending of router advertisements, by itself, it does not provide network addressing information. It’s more of a request for such information.
- Router Advertisement: This is the correct answer. Router advertisement messages are sent periodically by routers or in response to router solicitations. They provide necessary network information for SLAAC, including network prefixes, flags indicating whether additional information (like DNS) is available via DHCPv6, and other parameters needed for address configuration and general network settings.
|