Chapter 28
1. B. PC1 needs to discover PC2’s MAC address. Unlike IPv4, IPv6 does not use ARP, instead using NDP. Specifically, PC1 uses the NDP Neighbor Solicitation (NS) message to request that PC2 send back an NDP Neighbor Advertisement (NA). SLAAC relates to address assignment, and not to discovering a neighbor’s MAC address.
2. D. Hosts can ask for (solicit) all routers to identify themselves by sending an NDP Router Solicitation (RS) message, with the routers sending back an NDP Router Advertisement (RA) message. NDP Neighbor Solicitation (NS) can also be used by PC1, but not for the purpose of learning its default router IPv6 address. DAD is a function that happens to use NDP NS and NA messages, but its function does not include the discovery ...
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