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Huawei Exam H12-721 Topic 6 Question 88 Discussion

Actual exam question for Huawei's H12-721 exam
Question #: 88
Topic #: 6
[All H12-721 Questions]

The malformed packet attack technology uses some legitimate packets to perform reconnaissance or data detection on the network. These packets are legal application types, but they are rarely used in normal networks.

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Suggested Answer: C, D

Note: 1. USG A and USG B each start the BFD state machine. The initial state is Down and the BFD packet is Down. For a static BFD session, the value of the Your Discriminator is specified by the user. For the dynamic BFD session, the value of the Your Discriminator is 0. 2. After receiving the BFD packet whose status is Down, the USG B switches to Init. And send a BFD packet with the status of Init. 3. If the local BFD state of USG B is Init, the packets of the received state are Down. 4. The BFD state of USG A is the same as that of USG B. 5. After receiving the BFD packet in the Init state, the local state is switched to Up. 6. The BFD status of USG A changes with USG B. 7. After the state transition of 'DOWN-->INIT' occurs on USG A and USG B, a timeout timer is started. If the BFD packet is in the Init or Up state, the local state is automatically switched back to Down.


by Herman at May 31, 2024, 03:17 AM

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Antonio
1 years ago
Wait, so if the BFD session is static, does that mean we need to manually configure it every time? Sounds like a real pain in the BFD!
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Lyda
1 years ago
Okay, I think I've got it. If the 'DOWN-->INIT' transition happens, the timeout timer starts, and if the BFD packet is in the Init or Up state, the local state gets auAnnitaatically switched back to Down. That's going to be a tricky one to remember!
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Ena
1 years ago
Whoa, hold up! So if USG B switches to the Up state after receiving the BFD packet in the Init state, does that mean the session is finally established? I'm just trying to wrap my head around all these state transitions.
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Dorethea
1 years ago
The state transitions can be a bit confusing, but once it's Up, you're good to go.
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Pedro
1 years ago
Yes, once USG B switches to the Up state, the session is considered established.
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Barney
1 years ago
Hmm, I'm a bit confused. If the local BFD status of USG B is Init, can we really re-process and update its local status if we keep receiving packets with the status Down? Seems like there might be a catch there.
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Dallas
1 years ago
Yes, after the local BFD status of USG B is Init, it can re-process and update its local status if needed.
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Tommy
1 years ago
It's possible to re-process and update the local status of USG B if it continues to receive packets with the status Down.
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Annita
1 years ago
Alright, let me see if I've got this straight. The initial state is Down, and the BFD packet is also Down, with the Your Discriminator value set to 0. Is that right?
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Davida
1 years ago
I disagree, I believe the answer is D. Once the state transitions to INIT, a timeout timer is started and if the packet is not in Up state, it switches back to Down.
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Mirta
1 years ago
Wait, so we have to configure a static BFD session between USG A and USG B? That seems like a lot of work just to establish a session!
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Dorothy
1 years ago
Once it's set up, the BFD session will help ensure quick detection of any issues.
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Enola
1 years ago
It may seem like a lot of work, but it's necessary for a stable connection.
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Abel
1 years ago
Yes, it may seem like a lot of work, but it's crucial for network reliability.
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Hillary
1 years ago
Once the session is established, the BFD protocol helps in maintaining a stable connection between USG A and USG B.
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Chara
1 years ago
Yes, configuring a static BFD session allows for faster detection of link failures and quicker rerouting of traffic.
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Trina
1 years ago
It may seem like a lot of work, but having a static BFD session ensures a reliable connection between USG A and USG B.
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Merlyn
1 years ago
It's necessary for the BFD session to ensure quick detection of failures.
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Ula
1 years ago
I think the correct answer is A. The BFD session starts in the Down state with a Discriminator value of 0.
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