A NAS appliance has had a failed NIC replaced. Now the NAS appliance is no longer visible on
the network. Which of the following is the MOST likely cause of the problem?

A.
The network cable connecting the NAS to the network switch is bad.

B.
The network port that the appliance is connected to is assigned to the wrong VLAN.

C.
Port security on the Ethernet switch has disabled the port.

D.
Firewall needs to be updated for the new NAS device.

Explanation:
As by port security switch find the changes in mac address because nic is replaced so due to
security reason switch shut that port.