A network technician at a small office upgrades the LAN switch. After the upgrade, a user reports being unable to access network resources. When the technician checks the switchport, the LED light is not lit. Which of the following should the technician check FIRST?
A. The device is using the correct cable type.
B. The switchport is functioning properly.
C. The device is connected to the switch.
D. The switch is connected to the router.