Huawei Certified Network Associate – Routing and Switching (HCNA-RS, legacy) — Question 151

Which of the following OSPF packets can ensure LSA update reliability?

Answer options

• A. DD
• B. LSR
• C. LSU
• D. LSACK

Correct answer: C

Explanation

The correct answer is C, LSU, which is responsible for carrying Link-State Updates that contain the actual LSAs. While LSACK (option D) acknowledges receipt of LSUs, it does not carry the LSAs themselves, and DD (option A) and LSR (option B) are used for different purposes in the OSPF process.