H31-321 Online Practice Questions and Answers

In a board replacement scenario, an SDH board is configured with ring MSP. Which alarm will be reported after a forced switchover?

A. APSJNDI

B. APS_MANUAL_STOP

C. R_APS

D. APS_FAIL

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. Reseat the faulty SCC board.

B. The D byte can automatically pass through, because a protection overhead bus is available between the paired slots. Therefore, no extra operation is required.

C. Remove the faulty SCC board.

D. Delete the faulty SCC board on the NMS.

A service created using the trail function will not become a discrete service.

A. TRUE

B. FALSE

Which of the following functions, when enabled, allows the transmitting laser of an optical port to be automatically shut down when the IN port fails to receive signals?

A. LCAS

B. ALS

C. ALC

D. LPT

When the local end detects BER threshold-crossing in the receive direction, what performance events may be reported in the transmit direction of the peer end?

A. LPFEBBE

B. HPFEBBE

C. MSFEBBE

D. RSFEBBE

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 statements are false about clock configuration guidelines?

A. The backbone layer and convergence layer must be configured with clock protection and with master and slave clock sources, which are used for clock protection switching.

B. An NE that is connected to a BITS clock or a high-precision external clock will trace an external clock source.

C. If a line clock source needs to be traced, ensure that the clock tracing route must be the shortest.

D. Tributary signals are used for timing between sites.

E. Wander does not occur in the clock signals that have been transmitted over multiple sites.

What do typical methods of testing Ethernet performance on NG-SDH equipment include?

A. Equipment performance test

B. Network performance test

C. System acceptance test

D. User-defined test

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.

What are required to collect networking information during daily equipment maintenance of MSTP equipment?

A. Obtain the network topology diagram.

B. Check whether the network involves interconnection with third-party equipment. If such interconnection exists, check for configuration precautions and compatibility requirements.

C. Obtain engineering design documents, including slot diagrams, fiber connection diagrams, mapping between NE name, NE ID, and NE IP addresses, equipment room layout, and ODF/DDF port distribution diagrams.

D. Obtain historical information blocks of preventive maintenance inspection.

E. Obtain equipment data backup information.