Huawei H31-321 Online Practice Questions and Exam Preparation

Huawei H31-321 Online Questions & Answers

• Question 41:

  Two SNCP rings are tangent. How many SCNP protection groups must be configured on the tangent node to achieve protection for inter-ring services, assuming one fiber cut on two rings or one fiber cut per ring?

  A. 2
  B. 4
  C. 6
  D. 8
  B. 4

• Question 42:

  If the quality of two BITs clocks is the same, what may happen after a protection switchover of the clock source?

  A. The NE fails to trace clocks.
  B. Protection switching of clock sources occurs frequently.
  C. The NE reports the clock signal loss alarm.
  D. Pseudo synchronization occurs.
  D. Pseudo synchronization occurs.

• Question 43:

  When commissioning OptiX OSN 3500 equipment, decide whether optical attenuators are needed. If the optical power is too high, user an attenuator to reduce optical power and to prevent damage to an optical port. Generally, for which port of an optical module is an optical attenuator used?

  A. IN
  B. OUT
  C. T1
  D. R1
  A. IN

• Question 44:

  An SNCP ring and an MSP ring are tangent. Which of the following are true about inter-ring service configuration on the tangent node?

  A. Configure one SNCP group for the service from the SNCP ring to the MSP ring.
  B. Configure two SNCP groups for the service from the SNCP ring to the MSP ring.
  C. Configure unidirectional cross-connections in dual transmission mode for the service from the MSP ring to the SNCP ring.
  D. Configure bidirectional cross-connections in dual transmission mode for the service from the MSP ring to the SNCP ring.
  A. Configure one SNCP group for the service from the SNCP ring to the MSP ring.
  C. Configure unidirectional cross-connections in dual transmission mode for the service from the MSP ring to the SNCP ring.

• Question 45:

  NG-SDH equipment supports -48 V and -60 V power inputs. For OSN 3500, you can set the monitoring range of power input voltage by setting the power jumpers of N3GSCC. For -48V power input, you need to remove the caps of jumpers J30 and J31.

  A. TRUE
  B. FALSE
  B. FALSE

• Question 46:

  Latency of store-and-forward equipment is the difference between the time the first bit of a data frame enters the equipment and the time the first bit exits the equipment.

  A. TRUE
  B. FALSE
  B. FALSE

• Question 47:

  What are the procedures of handling discrete services on the NMS?

  A. Check the consistency between NMS data and NE data.
  B. Check the consistency between the fiber connections created on the NE and physical fiber connections.
  C. Search for protection subnets, and ensure that all protection subnets are searched out and properly configured.
  D. After discrete services are searched out, the NMS analyzes the discrete services based on the displayed causes and solutions.
  E. After discrete services are searched out, delete the discrete services on the NMS.
  A. Check the consistency between NMS data and NE data.
  B. Check the consistency between the fiber connections created on the NE and physical fiber connections.
  C. Search for protection subnets, and ensure that all protection subnets are searched out and properly configured.
  D. After discrete services are searched out, the NMS analyzes the discrete services based on the displayed causes and solutions.

• Question 48:

  Which of the following statements is false about pre-commissioning check?

  A. Verify that the equipment is properly grounded.
  B. An AUX board provides multiple RJ45 ports that receive same signals. Wrong port connections do not affect the equipment or boards.
  C. On an AUX board, LAMP1 is the cabinet alarm indicator output port and LAMP2 is the cabinet alarm indicator cascading input port. Verify that the ports are connected correctly, to prevent short circuits.
  D. Verify that the NMS is successfully installed.
  B. An AUX board provides multiple RJ45 ports that receive same signals. Wrong port connections do not affect the equipment or boards.

• Question 49:

  When protection switching of services occurs on ASON tunnels, which of the following are involved in the entire protection process?

  A. NMS software
  B. ASON software
  C. NE software
  D. Board software
  B. ASON software
  C. NE software

• Question 50:

  Which of the following about bit errors are true?

  A. The bit errors in lower order paths cannot be detected by higher order paths, multiplex sections, and regenerator sections,
  B. Generally, higher order bit errors can trigger lower order bit errors.
  C. Bit errors in the regenerator section trigger bit errors in the multiplex section, higher order paths, and lower order paths.
  D. Generally, lower order bit errors can trigger higher order bit errors.
  E. In an optical synchronous transmission system, upon detecting bit error, the local end reports related alarms or performance events, and also informs the peer end of the bit error through overhead bytes.
  A. The bit errors in lower order paths cannot be detected by higher order paths, multiplex sections, and regenerator sections,
  B. Generally, higher order bit errors can trigger lower order bit errors.
  C. Bit errors in the regenerator section trigger bit errors in the multiplex section, higher order paths, and lower order paths.
  E. In an optical synchronous transmission system, upon detecting bit error, the local end reports related alarms or performance events, and also informs the peer end of the bit error through overhead bytes.