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  • Exam Name: Nokia Advanced Optical Network Design
  • Last Update: Dec 8, 2024
  • Questions and Answers: 40
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4A0-255 Practice Exam Questions with Answers Nokia Advanced Optical Network Design Certification

Question # 6

Consider the exhibit shows the standard 8-step network design process. Suppose that you have used this process to design a Green filed network, which has been commissioned and is in operation. The customer now requests an extension to the network to accommodate more steps and traffic. Which steps are not required when designing such an extension?

4A0-255 question answer

A.

Step 2(analyze Traffic Demand and Step 4 ( Define Network Topology)

B.

Step (Define Network Architecture ) and Step 5( Evaluate Traffic Demandon Architecture)

C.

Step2 (Analyze Available) and Step 8 (Analyze Cost).

D.

The steps to befollowed depended on the requirement of the network extension.

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Question # 7

What does an OPU tributary slot contain, when multiplexing OTN frames?

A.

An OUT.

B.

An ODU.

C.

An OPU.

D.

An OH byte

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Question # 8

Which of the following statements about the management plane data Communications Network (DCN) is correct?

A.

The management plane DCN uses in-band communication.

B.

The management plane DCN can be connected to each NEs via OSS/OBS interface.

C.

The management plane DCN can be connected to each NEs directly.

D.

The management plane DCN enables direct communication between the NEs.

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Question # 9

Suppose there is a 40 Gbit/s signal which has a symbol rate of Gbaud/s. Which modulation format is being used?

A.

QPSK

B.

BPSK

C.

4QAM

D.

DP-QPSK

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Question # 10

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

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 # 11

What isguardband required for?

A.

To reduce the impact of chromatic dispersion.

B.

To properly use the available bandwidth of the fibers.

C.

To enable each channel to support a higher modulation format.

D.

To reduce non-linear impairments between coherent and non-coherent channels.

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Question # 12

Which of the following is NOTan advantage of super-channels?

A.

Improved spectral efficiency

B.

Simplified management of the carriers

C.

Narrower spacing between carries of the super-channel

D.

Impairment-free transmission

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