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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

Which of the following statements about Bit Error Rate (BER) is correct?

Options:

A.

BER is the ratio of redundant bits to correct bits.

B.

BER is measured at both the transmitted and receiving ends.

C.

BER can be measured beforeafter the FEC decoding.

D.

BER can be accurately measured in a short period of time , for any rate.

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Question 2

Which of the following about the Optical channel Transport Unit (OUT0 in ONT network is correct?

Options:

A.

OUT refer to the section between two multiplexers passing through one or moreamplifiers.

B.

OUT refers to the section between two amplifiers.

C.

OUT enables the multiplexing of OCH connections.

D.

OUT enables FEC processing.

Question 3

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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