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Nokia 4A0-105 Exam - Topic 7 Question 128 Discussion

Actual exam question for Nokia's 4A0-105 exam

Question #: 128
Topic #: 7

[All 4A0-105 Questions]

In IEEE 802.1ag, how are loops detected?

ASpanning-tree BPDUs are returned to the sender.

BThe MEP sees its own CFM frames returned to itself.

CThis is not a function of IEEE 802.lag but of 802.1D

DThe record field of the CFM frame keeps track of chassis-mac addresses.

Show Suggested Answer

Suggested Answer: B

by Sommer at Jun 16, 2026, 05:59 AM

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Ryann

4 days ago

I feel like this question is similar to one we practiced about CFM frames, and I think option B is the right answer.

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Joseph

9 days ago

I remember something about BPDUs in spanning-tree, but I don't think that's related to 802.1ag.

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Nicholle

15 days ago

I think loops are detected when the MEP sees its own CFM frames returned, but I'm not entirely sure.

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