Which of these would be the best use of a loopback plug?
A) Check network connectivity from the LAN switch
B) Redirect printer jobs to a network printer
C) Check the error rates of a local network port
D) Convert a serial interface type from 9-pin to 25-pin
E) Keeps the hot side hot, and the cold side cold
The answer: C) Check the error rates of a local network port
A loopback plug takes the signal from a port or interface and redirects it back to the port. With the right diagnostics software, you can verify that the hardware interface is operating properly.
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