Nokia Exam 4A0-112 Topic 1 Question 1 Discussion

Actual exam question for Nokia's 4A0-112 exam

Question #: 1
Topic #: 1

A series of actions are triggered on a router as a result of enabling both loopfree-alternate for a link-state routing protocol and ip-fast-reroute. Which of the following is NOT one of those actions?

ACalculating the shortest-path next hop for each known IP prefix.

BCalculating a backup next hop for each known IP prefix, if it exists, that would not create a routing loop if used without informing other routers.

CInstalling two entries in the FIB for IP prefixes, one active and one in standby mode.

DEnabling the router to locally repair the active path to an IP prefix in case of failure.

Show Suggested Answer

Suggested Answer: A

by Catherin at Jan 27, 2025, 11:34 AM

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Francesco

2 months ago

I think the answer is B, because it doesn't involve installing entries in the FIB.

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Krystal

2 months ago

Wait, so they're asking us what's NOT done? That's like a double negative, right? My head hurts just thinking about it!

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Trinidad

2 months ago

This is a tricky one. I'm going to have to do some more research on IP-FRR before I can be confident in my answer.

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3 months ago

Hmm, I'm not sure about C. Isn't that a bit excessive to have two FIB entries per prefix?

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Noel

29 days ago

Yeah, having two FIB entries per prefix does seem excessive.

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Paris

1 months ago

D) Enabling the router to locally repair the active path to an IP prefix in case of failure.

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Stephanie

2 months ago

B) Calculating a backup next hop for each known IP prefix, if it exists, that would not create a routing loop if used without informing other routers.

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Gwenn

2 months ago

A) Calculating the shortest-path next hop for each known IP prefix.

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Gaynell

3 months ago

I think the answer is C.

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