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