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

Which of the following statements about BFD operating modes are true?
A) In demand mode, once a BFD session is set up, the system no longer periodically sends BFD Control packets. and C) In 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. and D) Asynchronous mode is the primary BFD operating mode.
B) Asynchronous mode does not support the Echo function.

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

Actual exam question for Huawei's H12-821_V1.0 exam
Question #: 85
Topic #: 3
[All H12-821_V1.0 Questions]

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

Show Suggested Answer Hide 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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Susy
9 months ago
Asynchronous mode definitely sends packets, so C is true.
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Sharee
9 months ago
Wait, I thought D was just a preference, not the primary mode?
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Lizbeth
9 months ago
Totally agree, C is spot on!
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Maybelle
10 months ago
A is false, B is true.
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Josefa
10 months ago
BFD Control packets are crucial, can't believe some think otherwise!
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Amie
10 months ago
D seems like a safe bet since I recall that asynchronous mode is often mentioned as the default or primary mode in BFD discussions.
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Johna
10 months ago
C sounds right to me; I remember that in asynchronous mode, they do exchange packets regularly to check the connection.
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Carol
11 months ago
I feel like I saw a question about asynchronous mode and the Echo function, but I can't quite recall if it really doesn't support it.
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Micaela
11 months ago
I think A is tricky because I remember something about demand mode not sending packets unless there's a change.
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Carol
11 months ago
This is a good test of my BFD knowledge. I'll use the process of elimination to narrow down the options and select the right answers.
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Twanna
11 months ago
The wording of these options is a bit tricky. I'll need to think through the details of each mode to make sure I understand them correctly.
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Magnolia
11 months ago
Okay, I remember learning about BFD in class. I'm pretty confident I can identify the true statements here.
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Erick
12 months ago
Hmm, I'm a bit confused about the differences between the modes. Let me re-read the question carefully and think through each option.
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Precious
12 months ago
This looks like a straightforward question about BFD operating modes. I think I can handle this one.
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