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Huawei H12-931-ENU Exam Syllabus Topics:

Huawei Certified Internetwork Expert-Transmission Sample Questions:

1. In the point-to-point WDM networking scenario, the signal-to-noise ratio of a certain single wave is low, and the other channels are normal. The reason is that it is impossible?

A) The attenuation of the pigtail from the OTU board corresponding to this wave to the multiplexer increases
B) The transmit optical power of the OTU board corresponding to this wave has decreased
C) Increased attenuation on the light path
D) The gain slope of the amplifier changes

2. After the faulty board is found at the beginning of the project, after calling the TAC phone to locate the fault, you can go through the DOA process and apply for spare parts directly

A) TRUE
B) FALSE

3. Which of the following statements about the ALC function and configuration principles of the OTN system is correct? () (multiple choice)

A) Each ALC link has a unique ID, and ALC nodes can belong to different DCN subnets
B) The "working mode" of the OA board and RAU1/RAU2 board must be configured as "gain lock", if it is configured in other modes and ALC is configured, the ALC will not be adjusted
C) It is recommended that the number of network elements in the ALC link is less than 20, otherwise the ALC adjustment may time out and cause failure
D) If there are two cascaded OA boards in the node, the first node only configures the second OA board as the reference unit, and do not deploy the power detection unit
E) The detection and reference unit of the first node cannot use the same optical port of the same board
F) The ALC function can automatically adjust the output optical power of the amplifier in which the line attenuation changes. Except for the first site, other sites must be equipped with power detection units

4. The PTN self-organizing network supports physical layer clock synchronization, IEEE 1588V2 clock and time synchronization, and IEEE 1588 ACR clock synchronization.

A) TRUE
B) FALSE

5. During the network acceptance test, it was found that the OSN 3500 can work normally when connected to an external clock source. When the external clock source is disconnected, it enters the hold state, but the hold state cannot last for 24 hours. Please explain the possible reasons.

A) Access to external high-precision clock source time is too short
B) The clock crystal oscillator fails, and the board needs to be replaced
C) The clock SSM function is not enabled
D) Wrong clock level setting

Solutions: