H31-311_V2.5 Exam Dumps - HCIA-Transmission V2.5

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Question # 17

Optical monitoring channel is used for monitoring of WDM optical transmission systems. In the UU-T recommendation, it is preferable to use a 1510 nm wavelength of the a ") rate.

64 kbit/s

192 kbit/st

2 Mbit/s

5676 kbit/s

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Question # 18

According to ITU-T's recommendations, the requirement that the MSP switching time should be within 50ms is conditional. For example, the number of net elements on the entire ring network is less than 16.

True

False

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Question # 19

Which of the following communication protocols are used for DCN management of Huawei devices? (Multiple choice).

HWECC

TCP/IP

FTP

OSl

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Question # 20

Which of the following light sources has the best dispersion tolerance and stability?

Direct modulation of the light source

EA modulates the light source

Mach-Zehnder modulates the light source

None of the above

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Question # 21

When the working PQ1 board is oversized, the device will perform and the TFS protection will be reversed. Which of the following statements about the switching process are correct? (Multiple choice).

cross-connect board checks the PQ1 board fault through the board status bus. .

If the protection PQ1 board is normal, the cross-connection board sends a switching message to the D75S corresponding to the faulty PQ1 board through the switching control bus. .

The D75S board responds to the switch message by transmitting the service to the shared protection bus and stopping sending the service to the tyrant PQ1 board

The protection PQ1 board receives and processes the services transmitted from the D75S board to the protection bus to complete the protection switching

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Question # 22

Which factors determine the optical signal-to-noise ratio (OSNR) of the receiving end to a certain extent After the signal transmission in the WOM system is transmitted over a certain distance, the "oSNR" of the receiving end of the optical signal-to-noise ratio is reduced to a certain extent. Which of the following is the main cause?

Use EDFA. ).

Use of multi-density multiplexers and multiplexers.

Do not use new optical fibers.

Optical fiber attenuation is too high.

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Question # 23

After configuring PDH on a per-net element basis, the full trace cannot be searched. Which of the following is a possible cause? (Multiple choice)

The tributary plate is not selected to be recited correctly.

The board selection is incorrect.

The time period is not configured correctly 5.

Passthrough is not configured at the intermediate site. Correct answer)

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