Discuss Nokia 4A0-105 Exam Topic 4 Question 20

Click on the exhibit below.

Assuming there is a full mesh of mesh-SDPs between the PEs within each metro network and a spoke-SDP between PE-C of Metro A and PE-B of Metro B. how is traffic forwarded from PE-A in Metro A to PE-D of Metro B? Select the most accurate statement.

AAn LSP must be configured between PE-A and PE-D for this traffic to be forwarded.

BA VPLS FDB lookup is done at PE-A of Metro A only

CAn SDP must be configured between PE-A of Metro A and PE-D of Metro D for this traffic to be forwarded

DA VPLS FDB lookup is done at PE-A and PE-C of Metro A and PE-B of Metro B

Suggested Answer: D

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12 comments · newest first

Eliz 12 months ago

I disagree, I believe an SDP is essential for this scenario.

Jerry 12 months ago

No way, I thought it was just a lookup at PE-A!

Joaquin 12 months ago

Isn't it surprising that you need a specific SDP for forwarding?

Felix 1 year ago

I think a VPLS FDB lookup happens at all those PEs.

Lakeesha 1 year ago

Definitely need an LSP for that traffic to go through.

Andra 1 year ago

I vaguely recall that VPLS FDB lookups involve multiple points, so I’m leaning towards the option that mentions PE-A and PE-C, but I’m not entirely confident.

Ailene 1 year ago

I think I might be confusing the LSP requirements with the SDP configurations. Does traffic need an LSP to go from PE-A to PE-D?

Wava 1 year ago

This question feels similar to one we practiced where we had to determine the path of traffic in a mesh network. I think the FDB lookup might involve multiple PEs.

Isreal 1 year ago

I remember something about VPLS and how it handles forwarding, but I'm not sure if the lookup happens at just PE-A or if it involves the other PEs too.

Katheryn 1 year ago

Okay, let me think this through. BDD and ATDD are all about defining the expected behavior upfront, so I'd guess the answer is Model-based testing.

Earleen 1 year ago

Okay, let me see... I remember learning about the different OSS object types, and I think Snapshot is one that can be used for lifecycle management. But I'm not 100% sure about the other one. I'll make an educated guess and go with A and B.

Desiree 1 year ago

Focus groups would be terrible here - people won't speak candidly with peers around. I'm leaning towards interviews as the most direct approach.

Nokia 4A0-105 Exam - Topic 4 Question 20 Discussion