Huawei Huawei Certifications H31-321 Questions & Answers

• Question 51:

  What may cause the HP_LOM alarm?

  A. Services are not configured on upstream NEs.

  B. The service level is set inconsistently at both ends.

  C. The C2 byte to be transmitted on the terminal NE is 0x00, and the pass-through NEs are set to pass through the overhead.

  D. The board (for example, a cross-connect board) is faulty, resulting in loss of the H4 byte or incorrect H4 byte.

  Correct Answer: BD

• Question 52:

  An NE is frequently unreachable to the NMS. Which of the following are possible causes?

  A. Conflicted NE IDs or IP addresses

  B. The network size is too large, and ECC communication is beyond the processing capability of the network.

  C. On the network, multiple users are attempting to log in to the NE.

  D. The cross-connect board is faulty.

  E. The SCC board is faulty.

  Correct Answer: ABE

• Question 53:

  An N2SLQ16 board that is configured with AU3 services is faulty. If no spare N2SLQ16 board is available, the N1SLQ16 board can function as a substitute.

  A. TRUE

  B. FALSE

  Correct Answer: B

• Question 54:

  If the SRV indicator of a board is not red in a networkwide fiber connection test, the board can receive optical signals. When some optical ports are not used on a board with multiple optical ports, the SRV indicator is steady red. You need to use the NMS to check whether the board works properly.

  A. TRUE

  B. FALSE

  Correct Answer: A

• Question 55:

  NG-SDH equipment can be used for complex networking. Which of the following statements about protection or service configuration are true?

  A. On a network where MSP rings and SNCP rings share fiber resources, all timeslots can be configured for SNCP services, because SNCP service configuration is flexible and SNCP services does not require special overheads to transmit protocol information.

  B. Two SNCP rings are tangent. The source and sink work in dual transmission and selective receiving mode. The line boards corresponding to the tangent node are configured with bidirectional pass-through services. Given the preceding configurations, services can be protected after a fiber cut.

  C. Two MSP rings are intersected. To prevent service interruption upon failure of one intersecting node, you need to configure an SNCP service pair on an intersecting node to support dual transmission and selective receiving.

  D. OSN equipment does not support logical systems. You do not need to specify master and slave nodes during DNI service configuration.

  Correct Answer: CD

• Question 56:

  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

  Correct Answer: B

• Question 57:

  Two SNCP rings are intersected. Which of the following statements is true about inter-ring service configuration?

  A. Configure one unidirectional SNCP service pair on each intersecting node.

  B. Configure two unidirectional SNCP service pairs on each intersecting node.

  C. Configure four unidirectional SNCP service pairs on each intersecting node.

  D. Do not configure any SNCP protection group on each intersecting node.

  Correct Answer: C

• Question 58:

  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.

  Correct Answer: ABCE

• Question 59:

  A warm reset on a board does not affect running services, while a cold reset on a board affects running services.

  A. TRUE

  B. FALSE

  Correct Answer: B

• Question 60:

  To test bidirectional performance data, the two ports of a data analyzer must be set to simultaneously receiving and transmitting data. Otherwise, you cannot obtain the required data.

  A. TRUE

  B. FALSE

  Correct Answer: A