Nokia 4A0-255 Exam - Topic 11 Question 25 Discussion

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

Question #: 25
Topic #: 11

Consider two EDFA amplifiers in cascade. Each EDFA has an average input signal power of 10 mW and an average noise power of 1 mW. What is the OSNR of the system at the receiver.

A20 dB

B10 dB

C7 dB

D5 bB

Show Suggested Answer

Suggested Answer: A

by Georgene at Jul 29, 2023, 10:01 AM

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Heike

3 months ago

I thought the noise would be higher, but okay!

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Ressie

3 months ago

I think it’s actually 10 dB, not 20.

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Kanisha

4 months ago

Wait, are we sure about that? Sounds a bit high.

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Lizette

4 months ago

Definitely going with option A, 20 dB seems right!

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Terina

4 months ago

The OSNR is calculated as 10 * log10(P_signal / P_noise).

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Teddy

4 months ago

I’m pretty confident that the OSNR is calculated by taking the total signal power and dividing it by the total noise power, but I’m unsure how to apply it here with two amplifiers.

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Ettie

4 months ago

I feel like the answer might be around 10 dB, but I can't recall if that’s for one amplifier or both combined.

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Bulah

5 months ago

I think we practiced a similar question where we had to find the OSNR in dB, and I remember the formula involved the ratio of signal power to noise power.

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Xochitl

5 months ago

I remember something about calculating OSNR, but I'm not sure if I should add the noise powers or just take the average.

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Irving

5 months ago

I'm pretty confident about this one. The key is to focus on the typical delegation oversight program, not just the delegation agreement itself. I think option D is the correct answer.

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Octavio

5 months ago

This is a good question to test our understanding of cloud security and firewall management. I'll apply my knowledge of cloud infrastructure to select the most relevant reasons.

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Noel

5 months ago

"Show mac-address-table" seems too generic for VTEP, I think the answer has to be specific to VXLAN. So, I'm leaning towards option B.

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Mariko

5 months ago

I thought KMS allowed up to 60 days, but I could be confusing it with another service. It's so easy to mix these details up!

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