a network engineer is considering implementing UDLD throughout the network.
Which option must the network engineer consider?
A . UDLD aggressively disables the port after eight failed retries to connect to neighbor.
B . UDLD works at layer 1 of the OSI model.
C . UDLD is an IEEE standard that can be configured on non-cisco devices.
D . UDLD is already enabled by default on all ports on cisco switches.