A.Single board hardware failure

B.There is an important alarm on the board

C.Write FLASH operation or software loading in progress

D.Business is not working properly

A.VC

B.Tunnel

C.S-VLAN

D.AC

A.Directioned

B.Colorless

C.Colored

D.Directionless

A.When the receiving end receives NDF inversion for 8 consecutive frames, the device generates an AU_LOP alarm (AU pointer is lost)

B.Adjustment occurs when the rate (frame rate) of VC4 is higher than the rate (frame rate) of AU-4

C.The station detects that there is a TU pointer adjustment event in the low-order channel; it means that the pointer adjustment has occurred in the station

D.AU and TU pointer adjustments are adjusted in units of 1 byte

A.MP-BGP

B.LMP

C.RSVP

D.LDP