Huawei Certified Network Associate – Routing and Switching (HCNA-RS, legacy) — Question 138

Two routers are configured with OSPFv3. OSPFv3 is enabled on all interfaces of each router.
Which of the following is true in the event that the network administrator does not configure a Router-ID?

Answer options

• A. The IP address of the loopback 0 interface will be used as the router ID.
• B. The IP address of the loopback 1 interface will be used as the router ID.
• C. The IP address of interface G0/0/0 will be used as the router ID.
• D. No router ID will be assigned to the router.

Correct answer: D

Explanation

If a Router-ID is not configured, OSPFv3 will not assign one, resulting in option D being correct. Options A, B, and C are incorrect because OSPFv3 defaults to not assigning a Router-ID when none is explicitly set, rather than using any of the interfaces' IP addresses.