Huawei Certified ICT Professional – Data Center Network (HCIP-DCN) — Question 16

Which of the following statements regarding OSPF AS-External-LSA are true? (Choose all that apply.)

Answer options

• A. Net mask is set to all 0s.
• B. Advertising Router is set as the router ID of an ASBR.
• C. Link State ID and Advertising Router can uniquely identify an AS-External-LSA.
• D. Link State ID is set as an address on the destination network segment.

Correct answer: B, C

Explanation

Option B is correct because the Advertising Router indeed uses the router ID of the ASBR to identify the LSA. Option C is also accurate as both the Link State ID and Advertising Router together can uniquely identify each AS-External-LSA. Options A and D are incorrect as the net mask is not set to all 0s and the Link State ID does not correspond to an address on the destination network segment.