Which of the following is the MOST likely cause of this issue?

A network technician has been tasked with deploying new VoIP phones on a network. When the technician plugs the Ethernet cable for the phone into the wall port, the phone fails to turn on. When the technician plugs the Ethernet cable directly into the computer, the computer is able to access the network.

Which of the following is the MOST likely cause of this issue?
A . The network switch does not support PoE
B . The technician is connecting the phone to the wrong type of port
C . The firewall on the network is blocking access to the DHCP server
D . The Ethernet cable is the wrong type

Answer: A