68、which three statements about bridge assurance are true? (choose three)
BRIDGE ASSURANCE MUST BE ENABLE ON BOTH ENDS OF A LINK
BRIDGE ASSURANCE CAN BE ENABLE ON ONE END OF A LINK OR ON BOTH ENDS
BRIDGE ASSURANCE IS ENABLE ON STP POINT-TO-POINT LINK ONLY
BRIDGE ASSURANCE IS ENABLE ON STP MULTIPOINT LINKS ONLY
IF A BRIDGE ASSURANCE PORT FAILS TO RECEIVE A BPDU AFTER A TIMEOUT, THE PORT IS PUT INTO A BLOCKING STATE.
IF A BRIDGE ASSURANCE PORT FAILS TO RECEIVE A BPDU AFTER A TIMEOUT, THE PORT IS PUT INTO AN ERROR DISABLE STATE
