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Nokia 4A0-265 Exam Syllabus Topics:

Nokia Optical Diagnostics and Troubleshooting Sample Questions:

1. Which of the following is NOT a characteristic of an Optical Supervisory Channel Loss of Signal (OSC LOS) issue, in case that no "LD Input LOS" alarms are raised against the involved amplifiers?

A) A "Power Adjustment Required" alarm is eventually raised on the local node.
B) An "Incoming SUPVY LOS" alarm is raised on the local node.
C) A "Data Link Down" alarm is raised on the adjacent node.
D) Traffic does not pass between the local and adjacent nodes.

2. 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 below a specified OSNR threshold.
B) FEC enables errors to be detected and corrected without retransmission. This technique is effective only above a specified OSNR threshold.
C) FEC enables errors to be detected and corrected without retransmission. This technique is effective only below a specified OSNR threshold.
D) FEC enables errors to be detected and data to be retransmitted. This technique is effective only above a specified OSNR threshold.

3. Which of the following statements best describes the output of the CLI command: show wavekey wtmonitor
1/6/LINE summary?

A) A list of all channels detected against the selected interface, including Wave Keys pair, channel status, expected and measured power, allowed deviation, and tolerance.
B) A list of all channels on this interface for which any Wave Keys pair is being received.
C) A list of all channels detected against the selected interface (in and out); it shows if a Wave Keys pair is expected, if a Wave Keys pair is received, and if the received Wave Keys pair is unexpected.
D) A list of the unexpected channels detected against the selected interface.

4. On a bidirectional optical amplifier configuration, which of the following are Wavelength Tracker detection points?

A) An optical amplifier has no Wavelength Tracker detection points.
B) SIG interface only.
C) LINE and SIG interfaces.
D) LINEOUT and SIGOUT interfaces.

Solutions: