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Nokia 4A0-103 Exam - Topic 3 Question 121 Discussion

Actual exam question for Nokia's 4A0-103 exam
Question #: 121
Topic #: 3
[All 4A0-103 Questions]

What MPLS function should be performed by a router that receives a data packet with an MPLS label value of 0?

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Suggested Answer: B

by Erasmo at Jan 22, 2026, 10:11 PM

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Gabriele
5 days ago
The router should pop the label off the packet.
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Reena
10 days ago
Haha, I thought MPLS stood for "Mostly Pointless Label Switching"!
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Lai
15 days ago
The router should discard the packet, as a label value of 0 is invalid.
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Yasuko
20 days ago
Swap the MPLS label with a new value and forward the packet.
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Lenna
25 days ago
The router should pop the MPLS label and forward the packet based on the inner IP header.
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Annita
1 month ago
I’m a bit confused about the whole MPLS label stack. Does a label value of 0 mean it should just drop the packet or forward it normally?
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Lemuel
1 month ago
This kind of reminds me of a practice question where we had to identify what happens when a label is removed. I think it’s about forwarding the packet based on the IP header after popping the label.
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Fanny
2 months ago
I remember something about how a router should pop the label when it sees a 0, but I'm not entirely sure if that's the only action it takes.
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Lai
2 months ago
I think a label value of 0 means the packet is not labeled anymore, right? So the router should just treat it like a regular IP packet?
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Brandon
2 months ago
Ah yes, I remember now - label 0 indicates the packet is leaving the MPLS domain. The router should remove the label and route the packet based on the IP header.
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Matthew
2 months ago
I'm a bit unsure about this one. The MPLS label values can be confusing, but I'll try to reason through it step-by-step.
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Nicolette
3 months ago
Label 0 means the packet is exiting the MPLS network, right? So the router should probably pop the label and forward the packet based on the IP header.
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Pete
3 months ago
Okay, I know MPLS label 0 is special, but I can't quite remember what it means. Gotta review my MPLS notes for this one.
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Corinne
3 months ago
Hmm, this one's tricky. I'll need to think carefully about the MPLS label values and what they signify.
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