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最新的 Nokia Optical Network Services Expert 4A0-265 免費考試真題:

1. 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 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.
C) 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.
D) The alarm masking mechanism always forwards masked alarms to an external Network Management System (NMS) for alarm correlation.

2. Suppose a "Channel Absent" alarm is reported on an 1830 PSS node. What is the recommended order for the following troubleshooting steps?

A) 1. Go to the suspected troubled node / card / port and look at Wave Keys (in / out).
2. Retrieve the cross-connection (XC) details and see what Wave Keys should be present.
3. Check observed Wave Keys against expected Wave Keys.
4. Retrieve the channel power trace.
B) 1. Retrieve the channel power trace.
2. Retrieve the cross-connection (XC) details and see what Wave Keys should be present.
3. Go to the suspected troubled node / card / port and look at Wave Keys (in / out).
4. Check observed Wave Keys against expected Wave Keys.
C) 1. Retrieve the cross-connection (XC) details and see what virave Keys should be present.
2. Go to the suspected troubled node / card / port and look at Wave Keys (in / out).
3. Retrieve the channel power trace.
4. Check observed Wave Keys against expected Wave Keys.
D) 1. Check observed Wave Keys against expected Wave Keys.
2. Go to the suspected troubled node / card / port and look at Wave Keys (in / out).
3. Retrieve the channel power trace.
4. Retrieve the cross-connection (XC) details and see what Wave Keys should be present.

3. Consider the exhibit. A single directional fiber cut is occurring between two amplifiers in unidirectional configuration with Raman pump.
Multiple services are crossing the affected span.
Which node(s) will report an Incoming Payload LOS" alarm?

A) Both Node A and Node C
B) Neither Node A nor Node C.
C) No node, as a Raman pump is used in Node A.
D) Node C only.

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) LINE and SIG interfaces.
C) LINEOUT and SIGOUT interfaces.
D) SIG interface only.

問題與答案：