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Huawei Certified Network Professional-Building Carrier OTN Transmission Network Sample Questions:

1. If the IPA function does not start properly, what are the possible reasons? (multiple choice)

A) The IPA protection group is equipped with an auxiliary detection board. When the line is broken, the auxiliary detection board does not report alarms.
B) The IPA function is not enabled.
C) The fiber break time does not exceed the IPA's turn-off duration.
D) The IPA protection group is configured with an auxiliary detection board, but the board port selection of the auxiliary detection board is incorrect.

2. Which of the following does not belong to the network management side network layer data?

A) Path information
B) Cable connection information between network elements
C) Protecting subnet information
D) Uploaded configuration data

3. Which of the following conditions does not trigger the customer side 1+1 protection automatic switching?

A) Hard reset of the board.
B) ODUk_PM_LCK
C) OTUk_TIM.
D) OSC_LOS

4. Which of the following statements about EDFA is wrong.

A) Noise figure, saturated output power, gain flatness, gain, etc. are all important parameters for characterizing EDFA
B) EDFA's amplification of optical signals is pure optical amplification, no photoelectric conversion is required.
C) 1510nm optical monitoring channel can be effectively amplified by EDFA
D) When the EDFA output power reaches saturation, increase the input optical power and the gain of the EDFA will decrease.

5. Which of the following is the implementation principle of the ALC function, which one is wrong?

A) When the line returns to normal, if the nominal gain of the amplifier unit does not match the gain reference value, the amplifier gain is first adjusted back to the reference value, and then the attenuation value of the VOA is adjusted to ensure the power budget of the entire link.
B) When the line is degraded, first adjust the nominal gain of the optical amplifier unit, and then adjust the attenuation value of the attenuation adjustment unit (VOA) to ensure the power budget of the entire link.
C) The reference node transmits its output optical power value downstream every 10 seconds, and the detection node transmits the offset value of the amplifier gain and attenuation. Each node transmits the output optical power and the accumulated deviation value to subsequent nodes.
D) Compare the deviation between line attenuation and amplifier gain and the way the node gain compensates for offset.

Solutions: