Discuss Nokia BL0-220 Exam Topic 1 Question 5

Which of the following best describes the networking concept of "Underlay"?

AIt's the physical network layer.

BIt's the virtual network layer.

CIt allows each tenant to have their own network configuration.

DIt restricts traffic within network.

Suggested Answer: A

The networking concept of ''Underlay'' refers to the physical network layer that provides the connectivity and transport for the overlay network, which is the virtual network layer that runs on top of the underlay network1.The underlay network is composed of routers, switches, links, and protocols that enable the data transmission between different locations2.The underlay network is independent of the overlay network, meaning that it does not need to be aware of the network configuration, policies, or services of the overlay network3.Therefore, option A best describes the underlay network, while options B, C, and D are incorrect.Reference:1:Nokia Bell Labs Distributed Cloud Networks, Unit 2: Cloud Technologies and Features, Topic: Underlay and Overlay Networks2:Module by Module - Self Study Note Guide, DC2.2-- Cloud Options3:Underlay Network - an overview | ScienceDirect Topics, Overview

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19 comments · newest first

Yun 11 months ago

Really? I thought underlay was just about traffic restrictions!

Lawanda 11 months ago

C sounds interesting, but I think it's A.

Dorethea 11 months ago

Wait, isn't it more about virtual networks?

Deeanna 11 months ago

I agree, A is the right choice!

Henriette 12 months ago

It's definitely the physical network layer.

Yolando 12 months ago

I vaguely recall that underlay networks are about the foundational layer, but I can't remember if that means it's the physical layer or something else.

Larae 1 year ago

I’m a bit confused. I thought underlay was related to allowing tenants to have their own configurations, which makes me lean towards option C.

Telma 1 year ago

I remember studying about underlay and overlay networks, and I feel like underlay is more about the physical infrastructure. Maybe it's option A?

Marisha 1 year ago

I think "Underlay" refers to the physical network layer, but I'm not entirely sure. It could also be about how the virtual layer interacts with it.

Gail 1 year ago

The underlay restricts traffic within the network, so option D sounds like the right description to me.

Owen 1 year ago

The underlay allows each tenant to have their own network configuration, so I think option C is the best answer.

Marti 1 year ago

I'm pretty sure the underlay is the physical network layer, so I'll go with option A.

Caitlin 1 year ago

Hmm, I'm a bit confused between the underlay and overlay concepts. I'll need to think this through carefully.

Marta 1 year ago

Okay, I know user stories should include the who, what, and why, so I'm leaning towards option B. But I'm not 100% sure if that's the complete answer.

Kris 1 year ago

I'm a bit confused by the different options. I'll need to review my notes on PKI to decide.

Queen 2 years ago

I think the answer is A as well. The underlay is indeed the physical network layer that provides the foundation for overlay networks.

Stefania 2 years ago

I'm not sure about the answer. Can someone explain their rationale?

Ludivina 2 years ago

I disagree. I believe the answer is B) It's the virtual network layer.

Chaya 2 years ago

I think the answer is A) It's the physical network layer.

Nokia BL0-220 Exam - Topic 1 Question 5 Discussion