Implementing Cisco IP Routing (CCNP ROUTE, legacy) — Question 171

A packet capture log indicates that several router solicitation messages were sent from a local host on the IPv6 segment. What is the expected acknowledgment and its usage?

Answer options

• A. Router acknowledgment messages will be forwarded upstream, where the DHCP server will allocate addresses to the local host.
• B. Routers on the IPv6 segment will respond with an advertisement that provides an external path from the local subnet, as well as certain data, such as prefix discovery.
• C. Duplicate Address Detection will determine if any other local host is using the same IPv6 address for communication with the IPv6 routers on the segment.

Correct answer:

Explanation

The correct answer is B because routers respond to router solicitation messages with Router Advertisement messages that provide network information such as prefix and default gateway. Option A is incorrect as DHCP is not involved in this process, and option C pertains to address conflict detection rather than acknowledging router solicitations.