JNCIS-SP: Juniper Networks Certified Specialist – Service Provider Routing — Question 14

Which two statements are correct about neighbor discovery in IPv6? (Choose two.)

Answer options

• A. Neighbor discovery relies on ARP to find neighbors on a local link.
• B. A neighbor is considered reachable when the neighboring device responds to a neighbor solicitation message.
• C. A neighbor is considered reachable when the neighboring device responds to a router solicitation message.
• D. Neighbor discovery does not use ARP to find neighbors on a local link.

Correct answer: B, D

Explanation

The correct answer includes B and D because neighbor discovery in IPv6 does not use ARP, which is a protocol for IPv4, and a neighbor is confirmed reachable only when it responds to a neighbor solicitation. Options A and C are incorrect; A mistakenly asserts the use of ARP, and C incorrectly links reachability to router solicitation responses.