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Nokia Optical Diagnostics and Troubleshooting Sample Questions:

1. Consider the exhibit.

Which type of loopback is applied?

A) Client port terminal Ioopback
B) Line port facility Ioopback
C) Client port facility loopback
D) Line port terminal Ioopback

2. Which of the following statements about the alarm masking mechanism is TRUE?

A) The alarm masking mechanism makes sure that alarms are always present on the downstream interfaces to facilitate the troubleshooting process.
B) The alarm masking mechanism preserves the events' original time stamps, when related alarms gets hidden and then eventually displayed because of the mechanism itself, so that the user can still know the date and time of the original issue.
C) The alarm masking mechanism updates the events' original time stamps when it masks/shows alarms, so that when an alarm is not masked anymore, the user can see the updated date and time associated with the original issue.
D) The alarm masking mechanism always forwards masked alarms to an external Network Management System (NMS) for alarm correlation.

3. Consider the exhibit. A single directional fiber cut is occurring between two amplifiers in bidirectional configuration. Which node(s) will report a "LD Input LOS" alarm?

A) Node B only
B) Node A and Node B
C) Node C only
D) Node A only

4. Which of the following statements about the Wavelength Tracker (WT) capability is TRUE?

A) WT is compatible with other vendor domains, but the user must make sure that Wave Keys are unique on the crossed domains.
B) WT uses a unique identifier based on a pair of numbers encoded by Optical Transponders OTs) into each service wavelength direction.
C) WT uses a unique identifier based on a pair of numbers encoded by Raman amplifiers into each service wavelength direction.
D) Wave Keys are originated by optical amplifiers.

Solutions: