You work as the network administrator at certways.com. You are sent to one of certways’s branch offices to investigate a network problem. The network at the branch office consists of twenty Windows XP workstations that are wired to a switch. The switch is connected to a router for Internet access. One of the users at the branch office reports that she is unable to access the Internet. All other users can access the Internet. Which of the following items should you check to solve the problem?

A.
The network card of the problematic machine, the port on the switch that uplinks to router, and the patch cable from the problematic machine to the switch.

B.
The patch cable from the problematic machine to the switch, the port on switch that the problematic machine is plugged into, and the external interface on the router.

C.
The network card of the problematic machine, the port on the switch that the problematic machine is plugged into, and the patch cable from the problematic machine to the switch.

D.
The port on the switch that the problematic machine is plugged into, the network card of the problematic machine, and the uplink port on the switch.