A technician is troubleshooting a network connectivity issue on a MFD and would like to eliminate the possibility of another device on the network having the same IP address. The technician should：（）

• A、disconnect the MFD and ping the IP address.
• B、disconnect the MFD and ping the subnet mask.
• C、disconnect the MFD and ping the loopback address.
• D、run the ipconfig command from the command prompt.