Which two statements correctly describe UDLD? (Choose two.)
A.
Unidirectional link detection is achieved through monitoring STP BPDUs.
B.
It is recommended that it be enabled globally rather than on an individual port.
C.
It is recommended that it be used with the loop guard feature.
D.
It is recommended that it be enabled in normal mode.
E.
When an error is detected, normal mode will disable a port.