What is a hardware loopback plug? - Networking

What is a hardware loopback plug?

A hardware loopback pug is a simple device for redirecting the outgoing transmissions from a system directly back into it. They are used in conjunction with software that diagnoses transmission problems. Loop back plugs are available both as serial ports and parallel ports. A hardware loop back plug loops the outgoing data signal wires back into the system on the signal line which has incoming signal.
What is pulse code modulation? - Networking
Pulse Code Modulation: A digital representation of an analog signal. Signal sampling is done with the magnitude of the signal regularly at uniform intervals.......
Why do we use Subnet mask? What are its uses? - Networking
Subnet mask is utilized for isolating the network id and host ids. This is to reduce the broadcast domain or to reduce heavy network traffic.......
What do you mean by Twisted-pair Cabling? - Networking
A twisted pair is a cable in which the cables are twisted at regular distances. Twisted pairs are used for transferring signals with high frequency........
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