【单选题】You connect a host to a switch port, but the new host cannot log into the server that is plugged into the same switch. What could the problem be? (Choose the most likely answer.)
A.
The router is not configured for the new host.
B.
The VTP configuration on the switch is not updated for the new host.
C.
The host has an invalid MAC address.
D.
The switch port the host is connected to is not configured with the correct VLAN membership.