Huawei Certified Network Professional – Routing and Switching (HCNP-RS, legacy) — Question 21

Which of the following statements is false?

Answer options

• A. An ABR maintains a separate LSDB for each area it is attached to. ABRs have multiple LSBDs.
• B. Metric, an ASE LSA parameter, can be specified when an external route is imported with 1 as its default value.
• C. The externally-derived routing information carries a tag for transmitting additional information of the route which is commonly used in a routing policy. The default value of the Tag label is 0.
• D. The Link State ID is the Router ID of the ASBR for type 4 LSAs.

Correct answer: C

Explanation

Option C is incorrect because the default value of the Tag label for externally-derived routes is not 0. Options A, B, and D are accurate statements regarding the functioning of ABRs, ASE LSAs, and type 4 LSAs, respectively.