You need to perform () operation before querying the error code and optical power on the network management system, otherwise the corresponding teaching data cannot be queried.

You need to perform () operation before querying the error code and optical power on the network management system, otherwise the corresponding teaching data cannot be queried.
A . Create logical fiber
B . Configuration data
C . Synchronize network element data
D . Enable network element performance monitoring time

View Answer

Answer: D