H31-321 Online Practice Questions and Answers

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. Incorrect fiber connections between boards

B. The cross-connect or line board is faulty.

C. 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.

D. Equipment power failure

E. The SCC board is faulty.

Alarm suppression applies to intra-board alarms. When alarms of different severity levels are generated, the alarm of a higher severity level suppress the alarm of a lower severity level.

A. TRUE

B. FALSE

No fiber connections exist between three rings. The gateway NEs of the three rings are connected to the NMS using different network cables but through the same HUB. What can you do to isolate ECC communication between the gateway NEs?

A. Disable extended ECC on the three gateway NEs.

B. Disable the OSI protocol on the three gateway NEs.

C. Disable DCC access on the three gateway NEs.

D. Delete the DCC transparent transmission bytes on the three gateway NEs.

Generally, a clock tracing chain consists of a maximum of 20 NEs. This rule does not apply to a clock subnet where the SSM protocol is enabled.

A. TRUE

B. FALSE

You can change the VC-12 numbering policy by configuring related parameters on the U2000.

A. TRUE

B. FALSE

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

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.

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.

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

The cross-connection resources used by discrete services cannot be used to create other services. All discrete cross-connections must be deleted.

A. TRUE

B. FALSE