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4A0-255 Exam Dumps : Nokia Advanced Optical Network Design

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Nokia Advanced Optical Network Design Questions and Answers

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Question 1

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.

Options:

A.

20 dB

B.

10 dB

C.

7 dB

D.

5 bB

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Question 2

Which of the following statements about the Decision (HDEFC) decoding and soft decision FEC (SDFEC) decoding is FALSE?

Options:

A.

HDFEC injects less latency into the decoding process than SDFEC.

B.

HDFEC provides a higher coding gain than SDEFC

C.

HDFEC uses fewer thresholds than SDEFC.

D.

HDFEC discards bits earlier in the decoding process than SDEFC.

Question 3

Suppose that for a given number of buffer credits and for an given average FC frame size, the maximum FC link length is 50 km.

If the average FC frame size is doubled, which of the following is correct?

Options:

A.

The throughput is halved.

B.

Throughput is doubled.

C.

The Throughput is the same,.

D.

The buffer credits need to be adjusted to achieve the maximum throughput.

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