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Nokia 4A0-265 Exam Syllabus Topics:

SectionObjectives
Topic 1: Optical Network Fundamentals- Optical transmission principles
  • 1. Light propagation and fiber characteristics
    • 2. Signal attenuation and dispersion concepts
      - DWDM/OTN basics
      • 1. Wavelength division multiplexing principles
        • 2. Optical transport network architecture overview
          Topic 2: Optical Equipment and System Operation- Nokia optical platform components
          • 1. ROADM and optical amplifiers
            • 2. Transponders and muxponders
              - System configuration and monitoring
              • 1. Network management system usage
                • 2. Provisioning and service activation basics
                  Topic 3: Maintenance and Optimization- Network optimization techniques
                  • 1. Signal quality optimization
                    • 2. Capacity and performance tuning
                      - Preventive maintenance
                      • 1. Performance trend analysis
                        • 2. Degradation detection
                          Topic 4: Network Diagnostics and Troubleshooting- Fault detection methods
                          • 1. Performance monitoring indicators
                            • 2. Alarm interpretation and correlation
                              - Troubleshooting procedures
                              • 1. Root cause analysis techniques
                                • 2. Layered fault isolation approach

                                  Nokia Optical Diagnostics and Troubleshooting Sample Questions:

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


                                  2. Consider the exhibit which shows part of an EPT Schematic View. Which number refers to the Wavelength Router (WR8-88) block?

                                  A) 3
                                  B) 2
                                  C) 4
                                  D) 1
                                  E) 5


                                  3. Consider the exhibit which shows an EPT Power Management Report referring to an ingress amplifier. What is the available output optical power range?

                                  A) -0.6 to 1.72 dB
                                  B) 0.56 to 1.14 dB
                                  C) 0.56 to 1.72 dB
                                  D) -0.02 to 1.14 dB


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


                                  Solutions:

                                  Question # 1
                                  Answer: B
                                  Question # 2
                                  Answer: D
                                  Question # 3
                                  Answer: A
                                  Question # 4
                                  Answer: C

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