Cisco 400-007 Exam - Topic 3 Question 61 Discussion

Actual exam question for Cisco's 400-007 exam

Question #: 61
Topic #: 3

Company XYZ Is running a redundant private WAN network using OSPF as the underlay protocol The current design accommodates for redundancy In the network, but it Is taking over 30 seconds for the network to reconverge upon failure Which technique can be Implemented In the design to detect such a failure in a subsecond?

ASTP

Bfate sharing

COSPF LFA

DBFD

Eflex links

Show Suggested Answer

Suggested Answer: E

by Amber at Apr 06, 2025, 10:26 AM

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Ressie

8 months ago

30 seconds? Wow, that seems way too long for reconvergence!

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Joanna

9 months ago

Flex links? Never heard of that being used for this.

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Harley

9 months ago

OSPF LFA is great for fast reroute!

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Ira

9 months ago

BFD is the way to go for subsecond detection.

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Bette

9 months ago

I thought STP was for loop prevention, not failure detection?

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Tawny

9 months ago

OSPF LFA sounds familiar, but I feel like BFD is the more common technique for subsecond failure detection.

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Sueann

10 months ago

I’m a bit confused about fate sharing. I don’t recall it being related to rapid failure detection in OSPF.

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Jacquline

10 months ago

I think I practiced a similar question where BFD was mentioned as a solution for faster failure detection. It might be the answer.

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Ben

10 months ago

I remember studying OSPF and how it can take time to reconverge, but I’m not sure if BFD is the right choice here.

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Tricia

10 months ago

I'm a bit confused on the differences between some of these options like fate sharing and flex links. I'll need to do some research to understand which one is most appropriate here.

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Gianna

11 months ago

I'm leaning towards D. BFD since the question specifically asks for a subsecond failure detection technique, and that seems to fit the bill.

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Vicki

11 months ago

OSPF LFA could also be a good option to consider. It provides fast convergence without needing to configure an additional protocol like BFD.

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Carmelina

11 months ago

Hmm, I'm not too familiar with BFD. I'll need to review the details of how it works to be sure it's the right choice here.

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Johna

11 months ago

I think the answer is D. BFD seems like the best option to quickly detect a network failure and trigger a fast reconvergence.

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Silvana

1 year ago

Gotta love it when the perfect solution is just a simple protocol like BFD. D all the way!

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Thaddeus

1 year ago

Haha, I bet the network admin wishes they had implemented BFD from the start! D is definitely the right answer here.

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Barbra

1 year ago

Definitely, OSPF LFA wouldn't provide the subsecond detection needed like BFD would.

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Royal

1 year ago

STP wouldn't cut it for this scenario, BFD is the best choice.

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Rickie

1 year ago

Yeah, BFD is the way to go for subsecond failure detection.

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Kenneth

1 year ago

I agree, BFD would definitely help with faster convergence.

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Theola

1 year ago

Hmm, I was debating between C and D, but I think D. BFD is the way to go. It's purpose-built for rapid failure detection, which is exactly what they need here.

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Lore

1 year ago

User 3: Agreed, BFD is the best option for subsecond failure detection.

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Wayne

1 year ago

User 2: Yeah, BFD is designed for rapid failure detection.

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Leontine

1 year ago

User 1: I think D. BFD is the way to go.

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Wilda

1 year ago

I'm going with D as well. BFD is the perfect solution for this scenario - it can detect failures much faster than OSPF's normal operation.

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Kristin

1 year ago

I'm going with D as well. BFD is the perfect solution for this scenario - it can detect failures much faster than OSPF's normal operation.

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Carlton

1 year ago

E) flex links

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Bobbye

1 year ago

D) BFD

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Alica

1 year ago

C) OSPF LFA

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Sylvie

1 year ago

B) fate sharing

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Venita

1 year ago

A) STP

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Heike

1 year ago

I'm not sure, but I think OSPF LFA could also be a good option for faster convergence.

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Karan

1 year ago

I agree with Olen, BFD can help detect failures quickly.

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Wenona

1 year ago

D. BFD sounds right to me. It's a great way to get that sub-second failure detection without having to rely on the slower OSPF convergence process.

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Odette

1 year ago

User 4: BFD seems like the most efficient choice for quick failure detection.

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Belen

1 year ago

User 3: I agree, BFD is much faster than waiting for OSPF to reconverge.

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Natalie

1 year ago

User 2: Yeah, BFD is definitely the best option for that.

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Anika

1 year ago

User 1: I think BFD is the way to go for sub-second failure detection.

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Olen

1 year ago

I think the answer is D) BFD.

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Kip

1 year ago

I think the answer is D. BFD (Bidirectional Forwarding Detection) is a protocol designed specifically for quick failure detection, which is exactly what the question is asking for.

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Felicitas

1 year ago

Yes, BFD is the way to go for fast network convergence.

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Reuben

1 year ago

I agree, BFD is the best option for subsecond failure detection.

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