Huawei HCNP-MSTP Transmission - H31-321 Exam Questions [2026]

QUESTION NO: 1
What kinds of service conversion are supported by an ASON network?

A. Conversion between traditional services and copper services B. Conversion between traditional services and silver services C. Conversion between traditional SNCP services and diamond services D. Conversion between traditional services and gold services E. Conversion between traditional services and tunnel services F. Conversion between traditional services and iron services

Correct Answer: A,B,C,D,F

QUESTION NO: 2
On a chain network, if the SCC board on an intermediate station becomes faulty and the line boards of the station are installed in paired slots, which of the following methods can be used to ensure normal ECC communication between the other stations?

A. The D byte can automatically pass through, because a protection overhead bus is available between the paired slots. Therefore, no extra operation is required. B. Reseat the faulty SCC board. C. Delete the faulty SCC board on the NMS. D. Remove the faulty SCC board.

Correct Answer: D

QUESTION NO: 3
What are the procedures of handling discrete services on the NMS?

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

Correct Answer: A,B,C,E

QUESTION NO: 4
During normal operation of a network, the conditions that trigger a protection switching are generated on the working channel but services fail to be automatically switched to the protection channel. Services are interrupted, but the MS protocol status is normal on the NMS. What are the possible causes?

A. The SCC board is faulty. B. The configuration data on the NE and those on the NMS are inconsistent. As a result, the parameters of MSP nodes do not take effect. C. The cross-connect or line board is faulty. D. Incorrect fiber connections between boards E. Equipment power failure

Correct Answer: B,C,D,E

QUESTION NO: 5
The physical cross-connect board of an OSN 3500 is N1SXCSA. Which of the following can be configured as the logical board for N1SXCSA?

A. N1UXCSA B. N1SXCSA C. N1EXCSA D. N2SXCSA E. N2EXCSA

Correct Answer: A,B,C

QUESTION NO: 6
Pointer justification is caused by asynchronous clocks on two interconnected NEs. When one NE reports a positive pointer justification event, the other NE reports a negative pointer justification event.

A. FALSE B. TRUE

Correct Answer: B