Nokia Exam 4A0-105 Topic 6 Question 92 Discussion

Actual exam question for Nokia's 4A0-105 exam

Question #: 92
Topic #: 6

How does PBB forward broadcast, unknown-unicast and multicast traffic from a B-VPLS to an l-VPLS?

AThe receiving PE checks the l-TAG in the l-SID to determine if there is a local l-VPLS on the node.

BThe receiving PE checks the l-SID in the l-TAG to determine if there is a local l-VPLS on the node.

CThe receiving PE checks the service label in the mpls header to determine if there is a local l-VPLS on the node.

DThe receiving PE checks the multicast B-DA to see if an l-SID has been mapped to the B-DA that matches a local l-VPLS on the node.

Show Suggested Answer

Suggested Answer: D

by Leota at Jul 07, 2024, 04:20 AM

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Ona

4 months ago

Wait, is this a trick question? What's an l-VPLS again? I should have paid more attention in class.

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Izetta

4 months ago

B) Don't worry, l-VPLS stands for Layer 2 Virtual Private LAN Service. It's used for connecting multiple sites in a single bridged domain.

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Henriette

4 months ago

A) The receiving PE checks the l-SID in the l-TAG to determine if there is a local l-VPLS on the node.

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Marcos

4 months ago

Option B all the way! Gotta love those l-TAGs and l-SIDs, am I right?

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Douglass

3 months ago

Absolutely, the l-SID in the l-TAG is key for forwarding broadcast, unknown-unicast, and multicast traffic in B-VPLS to l-VPLS.

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Whitney

4 months ago

I agree, it's all about checking the l-SID in the l-TAG to find the local l-VPLS on the node.

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Denny

4 months ago

Option B is definitely the way to go. Those l-TAGs and l-SIDs make it so much easier to determine local l-VPLS.

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Kizzy

5 months ago

I agree with Avery, B seems like the correct answer based on the question.

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Avery

5 months ago

But B makes more sense because it checks the l-SID in the l-TAG.

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Chery

5 months ago

I disagree, I believe the answer is D.

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Avery

5 months ago

I think the answer is B.

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Katlyn

5 months ago

Hmm, I'm not sure. This question is a real brain-teaser. I'll just guess and hope for the best.

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Bettyann

5 months ago

I'm gonna go with option C. Checking the service label in the MPLS header seems like the standard way to determine the local l-VPLS.

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Carlee

4 months ago

I agree, that's the most reliable way to find the local l-VPLS on the node.

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Ludivina

4 months ago

Option C is the best choice. It's all about checking that service label in the MPLS header.

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Kassandra

5 months ago

Option D seems like the most logical choice. Checking the multicast B-DA for a matching l-SID makes the most sense for forwarding traffic to the local l-VPLS.

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Roxane

5 months ago

I think option B is the correct answer. The l-SID in the l-TAG should indicate the local l-VPLS on the receiving PE.

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Lacey

4 months ago

Option B sounds like the right choice then.

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Noah

4 months ago

That makes sense, the l-SID should indicate the local l-VPLS on the receiving PE.

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Dulce

5 months ago

The receiving PE checks the l-SID in the l-TAG to determine if there is a local l-VPLS on the node.

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Hubert

5 months ago

I think option B is the correct answer.

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