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单选题
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.
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pingB
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