Nokia 4A0-103 Exam - Topic 3 Question 118 Discussion

Actual exam question for Nokia's 4A0-103 exam

Question #: 118
Topic #: 3

Click on the exhibit button below. Assume the following:

- The protected path is R1-R2-R3-R6.

- Fast reroute one-to-one protection is enabled.

If the original LSP already has two labels, and router R2 has failed, how many labels will there be in packets on the detour path?

Show Suggested Answer

Suggested Answer: B

by Carisa at Nov 24, 2025, 12:21 AM

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Robt

2 months ago

I think C) 3 is correct. The reroute needs an extra label.

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Edelmira

2 months ago

I’m not sure, but D) 4 seems too high.

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Corazon

2 months ago

I agree with Flo. B) 2 makes sense.

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Marva

2 months ago

I feel like it’s A) 1. Just one label on the detour.

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Donte

3 months ago

I’m leaning towards C) 3. The detour adds a label.

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Flo

3 months ago

I think it’s B) 2. The original labels stay.

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Carylon

3 months ago

Totally agree, it’s definitely 3 labels!

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Sophia

3 months ago

Wait, how do we get 3? That seems off.

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Myong

4 months ago

The answer is definitely B) 2 labels. Unless, of course, it's not. In which case, I'm blaming the caffeine withdrawal.

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Devora

4 months ago

This question is a real head-scratcher. I'm going to need a label maker and a magnifying glass to figure this one out.

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Catalina

4 months ago

I bet the answer is D) 4 labels. You know, just to keep us on our toes.

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Gilma

4 months ago

Ah, the good old label-stacking game. I wonder if the exam proctors will let us use a label maker during the test.

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Salena

4 months ago

The answer is C) 3 labels. The original LSP has two labels, and with fast reroute one-to-one protection, an additional label will be added for the detour path.

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Nichelle

5 months ago

I’m confused about how the labels work in this scenario. I thought the detour would just use the existing labels, but I might be wrong.

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Carmen

5 months ago

This question seems similar to one we did in practice where we had to count labels after a failure. I think it might be 3 labels total.

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Lenna

5 months ago

I remember something about fast reroute and how it adds labels, but I can't recall if it adds one or two more.

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Brice

5 months ago

I think the detour path will still have the original labels, so maybe it’s 2? But I’m not entirely sure.

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Luz

5 months ago

I think I've got it. The original LSP has two labels, and the detour path will add one more label. So the total number of labels will be 3. C) is the right answer.

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