A.Data link layer

B.Application layer

C.Transport layer

D.Network layer

A.WDM_OTM

B.WDM OADM

C.WDM_OEQ

D.WDM_OLA

A.False

B.True

A.When some faults occur, there may be no obvious alarms or performance events reported, and sometimes no alarms or performance events are found.

B.In the case of complex networking, service, and fault information, many alarms and performance events may occur along with the occurrence of faults. Due to too many reports and performance events, maintenance personnel are unable to analyze.

C.Field maintenance personnel cannot understand the current health of the equipment.

D.The network administrator cannot obtain any alarms, time, and historical alarms of the device.

A.If the current path needs to be adjusted, you must inbound to adjust the fiber connection of the network.

B.The wavelength carrying the local service can be transmitted to fixed direction.

C.Directioned scenes are applied to networks that are not ASON.

D.When the service needs to be adjusted, or the working path is faulty, the optical crossover can be manually configured to implement flexible scheduling of services.