Nokia 4A0-115 Exam - Topic 10 Question 36 Discussion

Actual exam question for Nokia's 4A0-115 exam

Question #: 36
Topic #: 10

[All 4A0-115 Questions]

Based upon the exhibit,

which of the following statements about the forwarding of BUM traffic is FALSE?

APE3 replicates the traffic and sends it to all PES in its VPLS I flooding list.

BPE3 adds an ESI label to packets forwarded to PEI because PEI is connected to the same Ethernet segment.

CPEI forwards the traffic received from PE3 to CEI, and CEI discards it based upon the ESI label.

DPE2 decapsulates the packets received from PE3 and forwards the frames to CE2.

Show Suggested Answer

Suggested Answer: A

The local AC tag ID configured on PE2 must match the local AC tag ID configured on PE1. This ensures that the tag IDs are consistent across both ends of the VPWS service.The remote AC tag ID configured on PE2 does not need to match the remote AC tag ID configured on PE3, as long as they are unique within each PE1.

Verified Reference:Ethernet Virtual Private Networks (EVPNs)

by Margurite at Feb 10, 2025, 12:59 AM

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Odette

3 months ago

B seems off to me, PEI shouldn't need an ESI label.

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Shawn

3 months ago

I think D is the false statement here.

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Elsa

3 months ago

Wait, is PEI really discarding packets based on the ESI label?

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Florinda

4 months ago

Totally agree, that's how VPLS works!

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Aleshia

4 months ago

PE3 sends traffic to all PES in the flooding list.

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Kindra

4 months ago

I feel like option D is the false one because I thought PE2 only forwards traffic to CE2 if it’s not BUM traffic.

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Bonita

4 months ago

I practiced a similar question where PEI had to discard traffic based on labels, so option C might be true, but I'm not 100% confident.

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Carli

4 months ago

I'm not entirely sure about option B; I remember something about ESI labels but can't recall if they are added when PEI is on the same segment.

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Hana

5 months ago

I think option A sounds correct because PE3 should replicate and send BUM traffic to all PES in the flooding list, right?

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Pearline

5 months ago

Okay, let me think this through step-by-step. I need to focus on the forwarding of BUM traffic and determine which statement is incorrect.

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Crista

5 months ago

I'm feeling confident about this one. The key is to identify the statement that is false based on the information given in the exhibit.

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Slyvia

5 months ago

The exhibit provides a good visual to help understand the network topology. I'll use that to methodically evaluate each answer choice.

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Della

5 months ago

Hmm, I'm a bit confused by the VPLS and ESI label concepts. I'll need to review those topics before attempting this question.

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Cecilia

5 months ago

This question looks tricky, but I think I can figure it out if I carefully analyze the exhibit and the answer choices.

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Rusty

9 months ago

This exam question is a real head-scratcher. It's like trying to herd cats while juggling bowling balls! But hey, at least it's not a trick question about unicorns and rainbows, right?

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Mitzie

10 months ago

I think Option A is false. PE3 should be replicating the traffic and sending it to all PEs in its VPLS flooding list, not just the PEs.

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Benton

8 months ago

I think Option C is the false statement. PEI forwards the traffic to CEI, not discards it based on the ESI label.

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Nadine

8 months ago

But what about Option B? PE3 adding an ESI label to packets forwarded to PEI seems correct to me.

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Meaghan

8 months ago

I agree, Option A is definitely false. PE3 should be replicating the traffic to all PEs in its VPLS flooding list.

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Lindsey

10 months ago

Option D is the correct answer. PE2 would decapsulate the packets received from PE3 and forward the frames to CE2.

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Alva

9 months ago

C) PEI forwards the traffic received from PE3 to CEI, and CEI discards it based upon the ESI label.

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Kris

9 months ago

B) PE3 adds an ESI label to packets forwarded to PEI because PEI is connected to the same Ethernet segment.

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Annamaria

9 months ago

A) PE3 replicates the traffic and sends it to all PEs in its VPLS I flooding list.

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Carin

10 months ago

Option B is incorrect. The ESI label is used to identify the Ethernet segment, not to send the traffic to PEI.

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Corrie

9 months ago

D) PE2 decapsulates the packets received from PE3 and forwards the frames to CE2.

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Justine

9 months ago

C) PEI forwards the traffic received from PE3 to CEI, and CEI discards it based upon the ESI label.

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Carlee

10 months ago

B) PE3 adds an ESI label to packets forwarded to PEI because PEI is connected to the same Ethernet segment.

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Noel

10 months ago

A) PE3 replicates the traffic and sends it to all PEs in its VPLS I flooding list.

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Starr

10 months ago

Option C is definitely false. The ESI label is added to identify the Ethernet segment, not to discard the traffic. PEI would forward the traffic to CE1, not discard it.

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