Nokia 4A0-255 Exam - Topic 4 Question 74 Discussion

Actual exam question for Nokia's 4A0-255 exam

Question #: 74
Topic #: 4

[All 4A0-255 Questions]

Which of the following can be detected through power monitoring with an Optical Time Domain Reflect meter?

DIntrusions in the cryptographic keys

AIntrusions on fibers

BPower injection one channel

CHacking of L1 encryption

Show Suggested Answer

Suggested Answer: B

by Ahmed at Jan 23, 2026, 12:09 AM

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Mitsue

5 days ago

I remember a practice question that mentioned loss measurements, so maybe it can help identify issues related to power loss in the fiber?

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Trinidad

10 days ago

I think we covered something about detecting faults and splices with the OTDR, but I'm not entirely sure if it can monitor power levels directly.

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Nguyet

15 days ago

I've got a good handle on OTDR principles. I'll systematically go through the answer choices and evaluate which ones fit with the capabilities of this measurement tool.

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Rosendo

20 days ago

Ugh, I'm drawing a blank on this one. I'll have to review my notes and see if I can jog my memory about OTDR functionality.

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Latosha

25 days ago

Okay, let me see. An OTDR measures the backscattered light in an optical fiber, so it should be able to detect things like fiber breaks, splices, and other discontinuities. I'll focus on that.

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Leontine

1 month ago

Hmm, I'm a bit unsure about this one. I'll need to think through the capabilities of an OTDR and what kinds of network problems it can identify.

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Juan

1 month ago

I think I know how to approach this one. I'll start by reviewing the key concepts around optical time domain reflectometry and what types of issues it can detect.

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