Several users from the same building are reporting connectivity issues. The SFP at that buildings
IDF switch is showing a link light, but there is no link light to the corresponding switchs SFP at the
MDF. Which of the following is the MOST likely cause?

A.
A crossover cable is being used.

B.
DB loss is too high on all strands.

C.
Only TX or RX strand is working.

D.
TX and RX are reversed.