On a network with redundant switches, a network administrator replaced one of the switches but was unable to
get a connection with another switch. Which of the following should the administrator check after successfully
testing the cable that was wired for TIA/EIA-568A on both ends?


A. If MDIX is enabled on the new switch
B. If PoE is enabled
C. If a plenum cable is being used
D. If STP is disabled on the switches