Which two statements about root guard and loop guard are true? (Choose two)

Which two statements about root guard and loop guard are true? (Choose two)
A . When loop guard is enabled, the port is transtioned to the root-inconsistent state
B . Root guard disables an interface only when a superior BPDU is received
C . Loop guard uses its own keepalives to prevent loops by detecting failures
D . Root guard should be enabled on an upstream interface
E . Loop guard uses BPDU keepalives to determine unidirectional traffic
F . Loop guard uses its own keepalives to determine unidirectional traffic

View Answer

Answer: BE