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Huawei H31-311_V2.5 Exam Syllabus Topics:

Huawei HCIA-Transmission V2.5 Sample Questions:

1. When the working PQ1 board fails, the equipment will perform TFS protection switching. Which of the following statements about the switching process are correct? (Multiple choice)

A) The protection PQ1 board receives and processes the service transmitted from the D76S board to the protection bus to complete the protection switching
B) The cross-connect board detects the PQ1 board failure through the board status bus.
C) The D75S board responds to the switch message by transferring service to the shared protection bus and stopping sending service to the enemy Q1 board
D) 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.

2. Single-fiber bidirectional WDM system uses only one optical fiber to transmit optical signals in two directions at the same time. The optical signals in the two directions should be arranged at different wavelengths.

A) True
B) False

3. Which of the following statements about the frame structure of SDH signals are correct? (Multiple choice)

A) The frame period of different levels of SDH signals is the same
B) SDH signals of different rates have different frequencies.
C) SDH signal is byte interleaved by column
D) The information payload area only carries the information payload

4. In WDM systems, the reduction in optical signal-to-noise ratio is mainly due to the increasing amount of noise introduced into the optical fiber line.

A) True
B) False

5. If a bit error is detected in the B1 byte, which of the following alarms will be reported by the other end?

A) RS-FEBBE
B) RS-BBE
C) Not report
D) MS-AIS

Solutions: