Nokia 4A0-C02 Exam - Topic 12 Question 81 Discussion

Actual exam question for Nokia's 4A0-C02 exam

Question #: 81
Topic #: 12

Click on the exhibit below.

In the diagram below, SAP 1 is put into the blocking state as a result of the spanning tree protocol. What will occur in the VPLS instance if SAP 2 goes down and SAP 1 transitions to the forwarding state? Select the most accurate statement.

AA Spanning Tree BPDU will be sent across the mesh flushing the FDB table in all devices participating in the VPLS instance.

BStale information will be used within the VPLS instance to forward traffic until the FDB ages out.

CAn LDP control message will be sent to all devices in the mesh participating in the VPLS instance. Only MAC addresses associated with the PE that the failure occurred on will be flushed.

DAn LDP control message will be sent to all devices in the mesh participating in the VPLS instance. The entire FDB in the VPLS instance will be flushed.

Show Suggested Answer

Suggested Answer: C

by Noah at Mar 10, 2024, 10:20 AM

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Isaac

5 months ago

Option D sounds too extreme for just one SAP going down.

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Dorothy

5 months ago

I’m leaning towards option C, seems more accurate.

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Elfriede

5 months ago

Wait, does that mean traffic could get misrouted?

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Lynsey

5 months ago

Totally agree, stale info will be used for a bit.

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Shawnna

6 months ago

I think option B is the most likely outcome.

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Lenita

6 months ago

I think option B makes the most sense since it mentions stale information, but I'm not completely confident about the flushing part.

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Ryan

6 months ago

I feel like an LDP control message is involved, but I can't recall if it flushes the entire FDB or just specific MAC addresses.

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Barrett

6 months ago

This question seems similar to one we practiced where we discussed FDB aging. I think stale information might be used for a bit before it gets updated.

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Mindy

6 months ago

I remember studying how the spanning tree protocol works, but I'm not entirely sure what happens when SAP 1 transitions to forwarding.

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Bettina

6 months ago

Okay, I'm feeling more confident now. I believe the correct answer is option D, as an LDP control message will be sent to flush the entire FDB in the VPLS instance when SAP 1 transitions to the forwarding state.

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Raylene

6 months ago

I think I have a strategy for this. I'll start by reviewing the spanning tree protocol and how it impacts the forwarding behavior in a VPLS instance. Then I'll consider the implications of SAP 2 going down and SAP 1 transitioning to the forwarding state.

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Garry

6 months ago

I'm a bit confused by the terminology used in this question. VPLS, SAPs, and FDB tables - I'll need to make sure I understand these concepts before I can confidently select the right answer.

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Willard

6 months ago

Okay, let's see. The key information here is that SAP 1 is in the blocking state due to the spanning tree protocol. I'll need to think through how that might impact the VPLS instance if SAP 2 goes down.

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Ling

7 months ago

Hmm, this question seems tricky. I'll need to carefully analyze the diagram and the options to determine the most accurate statement.

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Melissa

7 months ago

Wait, do I need to do anything else besides just adding the alt text? I want to make sure I'm not missing any other steps here. I better review the instructions one more time.

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Ruthann

7 months ago

Security management approval seems like a key step. We'll need their buy-in on the prioritization process to make sure it aligns with the organization's security policies.

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Jenise

11 months ago

I'm torn between options C and D, but I think D is the better choice. Flushing the entire FDB in the VPLS instance is the safest and most comprehensive way to handle this scenario.

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Sabina

10 months ago

Agreed, option D seems like the most reliable choice in this scenario.

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Oretha

10 months ago

Exactly, it ensures that there are no stale entries causing issues.

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Brandon

10 months ago

That makes sense, it's important to have a clean slate in such situations.

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Junita

10 months ago

SAP 1 transitioning to the forwarding state will trigger the flushing of the entire FDB in the VPLS instance.

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Xuan

11 months ago

Haha, I can just imagine the network admin frantically hitting the 'Flush FDB' button after SAP 2 goes down. 'Time to hit the reset button on this whole thing!'

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Jean

10 months ago

User 3: The network admin must be really stressed out when something like that happens.

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Nettie

10 months ago

User 2: Yeah, I agree. It makes sense to flush the entire FDB in that situation.

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Dusti

11 months ago

User 1: I think option D is the correct one.

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Wynell

12 months ago

Option C doesn't quite make sense to me. Why would only the MAC addresses associated with the PE where the failure occurred be flushed? That seems too limited in scope for the VPLS instance.

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Ocie

10 months ago

Yeah, option D seems like the best choice for maintaining network stability in the VPLS instance.

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Truman

10 months ago

I agree, option C does seem a bit limited. Flushing the entire FDB would ensure that all devices have up-to-date information.

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Thurman

11 months ago

I think option D makes more sense. Flushing the entire FDB in the VPLS instance seems like a more comprehensive solution.

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Bernardo

12 months ago

I'm a bit skeptical about option B. Relying on stale information doesn't sound like a reliable solution, especially in a VPLS instance. The FDB needs to be properly updated to ensure proper forwarding.

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Floyd

10 months ago

Zona: That sounds like a more reliable solution for maintaining proper forwarding in a VPLS instance.

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Zona

11 months ago

User 2: I think option D makes more sense, flushing the entire FDB for a fresh start.

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Tijuana

11 months ago

User 1: I agree, relying on stale information doesn't seem like a good idea.

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Deonna

12 months ago

Option D seems the most accurate. If SAP 2 goes down and SAP 1 transitions to forwarding, an LDP control message will be sent to all devices in the VPLS instance, resulting in a full FDB flush. Simple and straightforward.

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