A network designer is redesigning an enterprise campus network to ensure that Ethernet
switches proactively attempt to reconnect after a fiber cut. In the design, they will have to
address areas where fiber cuts exist on campus from past troubleshooting, where a single fiber
is disconnected in the fiber pair, leading to looping. Which feature could be implemented in the
design to allow the Spanning Tree Protocol on the switches to be protected?

A.
loop guard

B.
UniDirectional Link Detection

C.
UniDirectional Link Detection aggressive mode

D.
root guard