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Nokia 4A0-115 Exam - Topic 4 Question 35 Discussion

Examine the exhibit.Which of the following actions is performed by PEI after it receives a BUM packet from CEI?
D) PEI sends the packet to PE2 and to PE3. An ESI label is included only in the packet sent to PE3.
A) PEI does not flood the packet because PEI is acting as non-designated forwarder (non-DF) for VPLS 10.
B) PEI sends the packet to PE2 but not to PE3 because PE3 is connected to the originating ES.
C) PEI sends the packet to PE2 and to PE3. An ESI label is included only in the packet sent to PE2.

Nokia 4A0-115 Exam - Topic 4 Question 35 Discussion

Actual exam question for Nokia's 4A0-115 exam
Question #: 35
Topic #: 4
[All 4A0-115 Questions]

Examine the exhibit.

Which of the following actions is performed by PEI after it receives a BUM packet from CEI?

Show Suggested Answer Hide Answer
Suggested Answer: D

EVPN-MPLS provides services over an MPLS network, not a simple IP network.The customer data is encapsulated with an MPLS label that identifies the service and then tunneled between the PE routers using MPLS LSPs1.

Verified Reference:Ethernet Virtual Private Networks (EVPNs)


by Gertude at Jan 22, 2025, 11:57 AM

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Alline
9 months ago
Totally agree with option A, non-DF means no flooding!
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Yoko
9 months ago
Wait, why would PEI send to both PE2 and PE3? Sounds odd.
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Cristal
10 months ago
Definitely option C, ESI label to PE2 makes sense!
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Sharika
10 months ago
I think it's option B, sending to PE2 only.
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Clare
10 months ago
PEI acts as a non-DF for VPLS 10, so no flooding.
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Markus
10 months ago
I'm leaning towards option B, but I wonder if there's a specific reason PE3 wouldn't get the packet. It feels like it could be a trick question.
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Wei
11 months ago
I feel like PEI has to send the packet to both PE2 and PE3, but I can't recall which label goes where.
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Tatum
11 months ago
I remember a similar question where PEI had to decide whether to send packets to multiple PEs. I think it was about avoiding loops or something.
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Galen
11 months ago
I think PEI might not flood the packet since it's a non-designated forwarder, but I'm not completely sure.
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Inocencia
11 months ago
I've got a good strategy for this. I'll eliminate the options that don't make sense based on the information provided, then choose the one that best fits the scenario described in the question.
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Moon
11 months ago
Okay, let me think this through. PEI is the non-designated forwarder for VPLS 10, so that rules out option A. The question is asking what PEI does with the packet, so I need to focus on the remaining options.
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Coleen
11 months ago
Hmm, I'm a bit unsure about this one. The details around PEI's actions after receiving the BUM packet are a bit confusing to me. I'll need to re-read the question carefully.
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Dorinda
11 months ago
This question seems pretty straightforward. I think I can work through it step-by-step and figure out the right answer.
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Garry
1 year ago
Don't forget to double-check your work, folks. These VPLS questions can be real brain-teasers!
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Barrett
1 year ago
C) PEI sends the packet to PE2 and to PE3. An ESI label is included only in the packet sent to PE2.
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Genevieve
1 year ago
B) PEI sends the packet to PE2 but not to PE3 because PE3 is connected to the originating ES.
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Lashawnda
1 year ago
A) PEI does not flood the packet because PEI is acting as non-designated forwarder (non-DF) for VPLS 10.
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Ricarda
1 year ago
This is a tough one, but I'm confident I can figure it out. I just need to remember the key VPLS forwarding rules.
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Aleisha
1 year ago
C) PEI sends the packet to PE2 and to PE3. An ESI label is included only in the packet sent to PE2.
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Penney
1 year ago
B) PEI sends the packet to PE2 but not to PE3 because PE3 is connected to the originating ES.
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Tyisha
1 year ago
A) PEI does not flood the packet because PEI is acting as non-designated forwarder (non-DF) for VPLS 10.
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Vannessa
1 year ago
Haha, I bet the test designers are trying to catch us out with those tricky answer options. Time to put on my thinking cap!
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Louann
1 year ago
Hmm, I'm not too familiar with the ESI label, so I'll need to make sure I understand that part properly.
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Raul
1 year ago
Hmm, I'm not too familiar with the ESI label, so I'll need to make sure I understand that part properly.
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Estrella
1 year ago
C) PEI sends the packet to PE2 and to PE3. An ESI label is included only in the packet sent to PE2.
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Haley
1 year ago
B) PEI sends the packet to PE2 but not to PE3 because PE3 is connected to the originating ES.
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Nell
1 year ago
A) PEI does not flood the packet because PEI is acting as non-designated forwarder (non-DF) for VPLS 10.
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Mari
1 year ago
Wow, this question is really testing our understanding of VPLS forwarding! I'm going to have to think this through carefully.
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Vinnie
1 year ago
User2: I agree, that makes sense based on the information provided in the question.
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Alesia
1 year ago
User1: I think the answer is C) PEI sends the packet to PE2 and to PE3. An ESI label is included only in the packet sent to PE2.
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Sylvie
1 year ago
That's an interesting perspective, Shalon. I guess we'll have to wait and see which one is correct when we get our exam results.
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Shalon
1 year ago
I disagree, I believe the answer is D. PEI sends the packet to both PE2 and PE3, but includes an ESI label only in the packet sent to PE3.
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Sylvie
1 year ago
I think the answer is C because PEI sends the packet to both PE2 and PE3, but includes an ESI label only in the packet sent to PE2.
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