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  • Exam Name: Nokia Optical Diagnostics and Troubleshooting Exam
  • Last Update: 27-May-2024
  • Questions and Answers: 40
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Get 4A0-265 Dumps : Verified Nokia Optical Diagnostics and Troubleshooting Exam

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4A0-265 Questions and Answers

Question # 1

Which of the following correctly describes how a unidirectional amplification stage works?

A.

• Incoming optical signals are boosted by the ingress amplifier.

• Outgoing optical signals do not pass through the ingress amplifier.

B.

• Incoming optical signals are boosted by the ingress amplifier.

• Outgoing optical signals pass through the ingress amplifier but are not boosted.

C.

• Incoming optical signals pass through the ingress amplifier but are not boosted.

• Outgoing optical signals are boosted by the ingress amplifier.

D.

• Incoming optical signals are boosted by the ingress amplifier.

• Outgoing optical signals are also boosted by the ingress amplifier.

Question # 2

Which of the following statements correctly describes where power adjustments can be performed?

A.

In bidirectional configurations, ingress power adjustments are performed against the ingress amplifiers, while egress power adjustments are performed against the egress amplifiers.

B.

In bidirectional configurations, both ingress and egress power adjustments are performed against the ingress amplifiers only.

C.

In unidirectional configurations, both ingress and egress power adjustments are performed against the ingress amplifiers only.

D.

When Raman pumps are used, both ingress and egress power adjustments are performed against the Raman pump directly.

Question # 3

When troubleshooting possible generic fiber cuts, the recommended first step is to: 1. Review alarms at nodes where power loss occurs.

What is the next recommended step?

A.

Review PM data to determine if the problem is intermittent.

B.

Perform network power traces to attempt to determine the point of power loss.

C.

Monitor amplifier total power in/out to isolate the direction of a possible cut.

D.

Review EPT design for calculated span loss.

Question # 4

Consider the exhibit. What do the different colored green columns indicate?

4A0-265 question answer

A.

Optical power levels measured multiple times against a specific interface, at 24-hour intervals for the same wavelength.

B.

Optical power levels measured for multiple wavelengths against a specific interface.

C.

Optical power levels measured at different interfaces throughout the optical path of a single wavelength.

D.

The average optical power levels measured for multiple wavelengths throughout their shared optical path.

Question # 5

Which of the following statements best describes the Forward Error Correction (FEC) technique?

A.

FEC enables errors to be detected and data to be retransmitted. This technique is effective only above a specified OSNR threshold.

B.

FEC enables errors to be detected and data to be retransmitted. This technique is effective only below a specified OSNR threshold.

C.

FEC enables errors to be detected and corrected without retransmission. This technique is effective only above a specified OSNR threshold.

D.

FEC enables errors to be detected and corrected without retransmission. This technique is effective only below a specified OSNR threshold.

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