A.172.128.0.1

B.192.168.0.1

C.10.0.0.1

D.10.255.0.1

A.The optical subtractor can only be added to the "IN" port, not to the "OUT" port

B.When the received optical power is too high, an optical attenuator is required

C.The light emitted by the laser is infrared light and is not strong, so you can point the connector at the human eye to observe whether there is light or not.

D.To clean the optical fiber connector and the optical interface of the laser, special cleaning tools and materials must be used

A.Check the fan box and clean the dust filter

B.Check the temperature, humidity and cleanliness of the computer room

C.Check the device for audible alarms

D.Check the cabinet and board indicators

A.MAC address

B.Minimum transmission distance

C.Working Mechanism of Conflict Detection

D.Maximum transmission distance

A.Detection and notification of service access points and intermediate transport network failures

B.Increase link capacity

C.Improve link availability