Huawei Huawei Certifications H31-321 Questions & Answers

• Question 41:

  When you reseat an SDH or PDH service board on NG-SDH equipment, certain alarms are reported. The alarms are automatically cleared after the board is online. Which are the typical alarms?

  A. BUS_ERR

  B. BD_NOT_INSTALLED

  C. BD_STATUS

  D. COMMUN_FAIL

  Correct Answer: CD

• Question 42:

  When preparing for engineering information, you need to check networking information, such as the network diagram, network protection type, NE IP addresses, NE IDs, NE name allocation table, board information, fiber and cable connections, service routes and timeslot allocation, clock tracing diagram, and orderwire diagram.

  A. TRUE

  B. FALSE

  Correct Answer: A

• Question 43:

  Which of the following system control boards allows an N1SXCSA board to be substituted with an N2PSXCSA board?

  A. N1GSCC

  B. N2GSCC

  C. N3GSCC

  D. N4GSCC

  Correct Answer: D

• Question 44:

  Which of the following may cause generation of discrete services in an NG-SDH system?

  A. Trail query conditions are not met. For example, the fiber connections created on the NMS are inconsistent with the actual fiber connections.

  B. Trail query restrictions exist. For example, among the multiple sources and sinks of a VC-4 service trail,

  C. some are outbound optical ports, and the others are non-outbound optical or electrical ports.

  D. Cross-connection configurations are incomplete or incorrect. Outgoing services exist.

  E. The service trails created in an end-to-end manner is not activated on the NMS.

  Correct Answer: ABCD

• Question 45:

  Generally, a central NE where ECC communication load is heavy and congestion is the most likely to occur is set as the gateway NE.

  A. TRUE

  B. FALSE

  Correct Answer: A

• Question 46:

  Which of the following statements is false about a network-level protection switching test?

  A. Before a 1:1 linear MSP switching test, set the switching mode to single-ended.

  B. During linear MSP switching, the NE reports the APSJNDI and MS_APS_INDI_EX alarms.

  C. A network is configured with SNCP. When the laser of the peer port is disabled, the SDH analyzer connected to the local port indicates a transient service interruption.

  D. Methods of testing MSP switching include single-ended loopback tests and dual-ended analyzer tests.

  Correct Answer: A

• Question 47:

  ECC routes are set up, updated, and maintained through broadcast at regular intervals. The larger a network, the more data is generated.

  A. TRUE

  B. FALSE

  Correct Answer: A

• Question 48:

  Test timeout may occur when you use SmartBits to test data frames. To solve this problem/ you can reduce interframe gap (IFG) to enable higher rate of transmitting valid data packets on the equipment side. The minimum IFG is 96 bit time.

  A. TRUE

  B. FALSE

  Correct Answer: A

• Question 49:

  Which of the following is false about the safe use of fibers?

  A. Use dedicated tools and materials to clean fiber connectors and the optical ports of lasers.

  B. Use optical attenuators if receive optical power is too high.

  C. An optical module that is recessed straightly can be directly connected to an optical attenuator.

  D. Connect an optical attenuator to an IN port, not OUT port,

  Correct Answer: C

• Question 50:

  The ID of an OptiX OSN 3500 NE is composed of a basic ID and an extended ID. The basic ID and extended ID are set using DIP switches during equipment commissioning.

  A. TRUE

  B. FALSE

  Correct Answer: B