H31-341 Online Practice Questions and Answers

Loopback is a common operation for routine maintenance and troubleshooting. Which of the following statements about loopback operations are incorrect?

A. The hardware loopback is performed by using the fiber jumper or self-loop cable to perform the loopback on the optical port or electrical port.

B. When performing a hardware loopback on an optical port, you need to add an optical attenuator.

C. After the outloop is performed, the signals are transmitted to the internal.

D. After the inloop is performed, the signals are transmitted to the external.

Which of the following statements about the line fiber quality monitoring performance parameters is wrong?

A. The pulse width of emitted optical pulses varies according to monitoring modes, and affects the detection distance and measurement precision. A greater pulse width provides a larger dynamic range, longer detection distance and better measurement precision.

B. When the pulse width increases, the light emitting time increases and consequently a larger energy is obtained. This means that a larger dynamic range can be acquired but also larger dead zones will result.

C. Measurement is performed multiple times within the detection time. The average value is obtained based on the measurement results to improve the measurement precision. The actual duration from the time when a detection event starts to the time when the detection results are returned will be longer than the Detection time.

D. The total fiber loss will affect the detection distance and the dynamic range is fixed for the same detection mode. Therefore, a larger total fiber loss indicates a smaller detection distance.

Which of the following monitoring boards do not support 1588v2 signal processing and transparent transmission?

A. AST2

B. SC2

C. ST2

D. SCI

Which of the following statements about the modulation technologies of the 40Gbit/s and 100Gbit/s coherent systems are correct?

A. The modulation technology used in a 100G coherent system is ePDM-QPSK.

B. The modulation technology used in a 40G coherent system is ePDM-BPSK.

C. The modulation technology used in a 40G coherent system is ePDM-QPSK.

D. The modulation technology used in a 100G coherent system is ePDM-BPSK.

Which of the following is not a PW APS switching condition?

A. A warm reset is performed on the board.

B. The board software is faulty.

C. MPLS_PW_SF

D. A cold reset is performed on the board.

Which of the following protection schemes require the APS protocol?

A. ODUk SPRing protection

B. ODUk SNCP

C. SW SNCP

D. 1:1 optical line protection

The maximum output optical power of an OBU board is 20 dBm, when it is used in a C-band 80-channel system, what is the standard per-channel output optical power?

A. +ldBm

B. -2dBm

C. +7dBm

D. +4dBm

If OCh trails fail to be created by trail, which are the possible causes?

A. There are still alarms that are not cleared on the boards involved in the OCh.

B. The wavelength settings at the source and sink ends are inconsistent.

C. Some fibers are not connected.

D. There is no server trail.

MPLS APS is a network protection mechanism. It implements service switching by using the MPLS OAM detection function.

A. True

B. False

When creating new NE,which of the following Configuration Mode can be selected?

A. Initialize and Manually Configure NE Data

B. Download

C. Upload

D. Copy NE Data