Neither the link or activity indicator lights on a NIC for a device are illuminated. The device cannot
be reached by any computers across the network. Which of the following is the BEST step for a
technician to take to begin troubleshooting?

A.
Connect to the device via crossover cable to test connectivity.

B.
Connect to the device via RS-232 cable to test connectivity.

C.
Verify the DHCP server is online.

D.
Replace the NIC on the computer.