Which of the following statements are true about fiber-shared virtual path protection?

A. The VC-4 timeslots of an optical path allocated to an MSP ring and those allocated for an SNCP ring must be different.

B. When the VC-4 timeslots of an optical path allocated to both an MSP ring and an SNCP ring are the same, services on the VC-4 timeslots have double protection.

C. The VC-4 timeslots of an optical path allocated to two MSP rings must be different.

D. When the VC-4 timeslots of an optical path allocated to two MSP rings are the same, services on the VC-4 timeslots have double protection.

E. The VC-4 timeslots of an optical path allocated to two SNCP rings must be different.

F. When the VC-4 timeslots of an optical path allocated to two SNCP rings are the same, services on the VC-4 timeslots have double protection.

Larger value of SSMB indicates better quality of a clock source.

A. TRUE

B. FALSE

To test the communication status of an NE, right-click the NE on the Main Topology of the U2000 and choose Ping.

A. TRUE

B. FALSE

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. 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.