Huawei Exam H12-821_V1.0 Topic 3 Question 85 Discussion

Actual exam question for Huawei's H12-821_V1.0 exam

Question #: 85
Topic #: 3

Which of the following statements about BFD operating modes are true?

AIn demand mode, once a BFD session is set up, the system no longer periodically sends BFD Control packets.

BAsynchronous mode does not support the Echo function.

CIn asynchronous mode, two systems periodically exchange BFD Control packets at the negotiated interval. If one system does not receive any BFD Control packets from the other within the detection time, the BFD session is declared down.

DAsynchronous mode is the primary BFD operating mode.

Show Suggested Answer

Suggested Answer: A, C, D

In asynchronous mode, BFD control packets are exchanged periodically to detect faults.

In demand mode, once the session is established, BFD stops sending periodic control packets and relies on external mechanisms to verify connectivity.

Asynchronous mode is the most commonly used mode. However, the Echo function is supported in asynchronous mode, making Option B incorrect .

by Delsie at Jul 08, 2025, 04:01 PM

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