Huawei H12-831_V1.0 Exam - Topic 4 Question 79 Discussion

Actual exam question for Huawei's H12-831_V1.0 exam

Question #: 79
Topic #: 4

On the OSPFv3 network shown in the figure, area 1 is a stub area.

Which of the following LSAs is generated by only one router?

A. Inter-Area-Prefix-LSA B. Link-LSA C. Network-LSA D. Intra-Area-Prefix-LSA

AInter-Area-Prefix-LSA (Type 3) (Incorrect)
Generated by an ABR to advertise prefixes between OSPF areas.
More than one ABR can generate this LSA.
Not always generated by only one router.

BLink-LSA (Type 8) (Incorrect)
Each router generates its own Link-LSA for each link it participates in.
This means multiple routers can generate this LSA.
Not generated by only one router.

CNetwork-LSA (Type 2) (Correct)
Generated ONLY by the Designated Router (DR) on a multi-access network (such as an Ethernet link).
Other routers do not generate this LSA, only the DR does.
Correct answer: This LSA is generated by only one router (the DR).

DIntra-Area-Prefix-LSA (Type 9) (Incorrect)
Generated by any router to advertise IPv6 prefixes within an area.
Multiple routers in an area can generate this LSA.
Not generated by only one router.
Final Conclusion:
C. Network-LSA (Type 2) is the correct answer because it is generated by only one router---the Designated Router (DR).
Thus, the correct answer is: C. Network-LSA.

Show Suggested Answer

Suggested Answer: C

Comprehensive and Detailed In-Depth

Understanding OSPFv3 LSA Types

OSPFv3 uses different LSA types than OSPFv2, with some being similar in function:

Link-LSA (Type 8): Generated by every router on a link to advertise link-local IPv6 information.

Intra-Area-Prefix-LSA (Type 9): Advertises IPv6 prefixes within an area.

Network-LSA (Type 2): Generated only by the Designated Router (DR) to advertise information about all routers on a multi-access network.

Inter-Area-Prefix-LSA (Type 3): Advertises network prefixes between OSPF areas (generated by ABRs).

Route Distribution Analysis:

HCIP-Datacom-Advanced Routing & Switching Technology V1.0 -- OSPFv3 LSA Types and Multi-Area Behavior

Huawei Official HCIP-Datacom Study Guide -- OSPFv3 Stub Areas and LSA Advertisements

Huawei Documentation on OSPFv3 DR/BDR Roles and LSA Generation

by Tequila at Jan 26, 2026, 04:10 PM

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1 month ago

Hmm, this looks like a tricky one. I'll need to think carefully about the characteristics of each LSA type and how they apply to a stub area.

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