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Cisco 300-420 Exam - Topic 2 Question 68 Discussion

Refer to the exhibit. A network engineer is designing an OSPF solution to connect a company's remote to a newly provisioned MPLS VPN backbone. Some of the branches have a direct dark fiber connection between each other. The engineer wants to ensure that the dark fibers are used only when the MPLS core is unavailable. Which solution must the engineer choose?
B) Sham link
A) Stub area
C) Virtual link
D) NSSA

Cisco 300-420 Exam - Topic 2 Question 68 Discussion

Actual exam question for Cisco's 300-420 exam
Question #: 68
Topic #: 2
[All 300-420 Questions]

Refer to the exhibit. A network engineer is designing an OSPF solution to connect a company's remote to a newly provisioned MPLS VPN backbone. Some of the branches have a direct dark fiber connection between each other. The engineer wants to ensure that the dark fibers are used only when the MPLS core is unavailable. Which solution must the engineer choose?

Show Suggested Answer Hide Answer
Suggested Answer: B

https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/iproute_ospf/configuration/xe-16/iro-xe-16-book/iro-sham-link.html


by Lashandra at Mar 21, 2023, 10:50 PM

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Tammara
10 months ago
Stub area won't help with the dark fiber situation.
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Alex
10 months ago
NSSA could work too, but sham link seems more efficient.
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Stephanie
10 months ago
Wait, can you really use sham links like that? Sounds risky.
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Apolonia
11 months ago
Totally agree, sham links are perfect for this scenario!
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Bulah
11 months ago
I think the best choice is a sham link.
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Fidelia
11 months ago
I thought virtual links were used for connecting discontiguous areas, but I'm not sure if that's the right choice for this situation.
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Iraida
11 months ago
I feel like NSSA could be a good option here, but I'm confused about how it interacts with the MPLS core.
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Joesph
11 months ago
I remember practicing a similar question about OSPF areas, but I can't recall if a stub area would work in this scenario.
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Leota
11 months ago
I think the answer might be a sham link since it allows for backup paths, but I'm not entirely sure.
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Veronika
11 months ago
I'm a bit confused here. Is it possible the domain controller is blocking the connection? Or maybe the user is logged in and preventing the RTR session?
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Ayesha
11 months ago
I'm a bit confused by this question. Is it asking about where the materials are stored, or where the changes to materials are saved? I want to make sure I understand the distinction before I answer.
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Sommer
11 months ago
I'm a bit confused on this one. At first, I thought Classification might work, but the problem statement doesn't mention any specific classes to predict. Convolutional Neural Networks (CNNs) don't seem relevant either, since we're not dealing with image data. I'll need to review my understanding of these algorithms before deciding.
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Kasandra
11 months ago
I'm not so sure about that. The application layer rate might be the largest, since that's the actual user data being transmitted.
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