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Nokia BL0-220 Exam - Topic 1 Question 5 Discussion

Which of the following best describes the networking concept of "Underlay"?
A) It's the physical network layer.
B) It's the virtual network layer.
C) It allows each tenant to have their own network configuration.
D) It restricts traffic within network.

Nokia BL0-220 Exam - Topic 1 Question 5 Discussion

Actual exam question for Nokia's BL0-220 exam
Question #: 5
Topic #: 1
[All BL0-220 Questions]

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

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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


by Kerry at Mar 08, 2024, 03:33 AM

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Yun
6 months ago
Really? I thought underlay was just about traffic restrictions!
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Lawanda
6 months ago
C sounds interesting, but I think it's A.
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Dorethea
7 months ago
Wait, isn't it more about virtual networks?
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Deeanna
7 months ago
I agree, A is the right choice!
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Henriette
7 months ago
It's definitely the physical network layer.
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Yolando
7 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.
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Larae
8 months 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.
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Telma
8 months 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?
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Marisha
8 months 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.
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Gail
8 months ago
The underlay restricts traffic within the network, so option D sounds like the right description to me.
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Owen
8 months ago
The underlay allows each tenant to have their own network configuration, so I think option C is the best answer.
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Marti
8 months ago
I'm pretty sure the underlay is the physical network layer, so I'll go with option A.
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Caitlin
8 months ago
Hmm, I'm a bit confused between the underlay and overlay concepts. I'll need to think this through carefully.
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Marta
8 months 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.
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Kris
8 months ago
I'm a bit confused by the different options. I'll need to review my notes on PKI to decide.
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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.
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Stefania
2 years ago
I'm not sure about the answer. Can someone explain their rationale?
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Ludivina
2 years ago
I disagree. I believe the answer is B) It's the virtual network layer.
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Chaya
2 years ago
I think the answer is A) It's the physical network layer.
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