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to test a network cable

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Q: Under what circumstance might you use a loopback plug?
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What command will allow a technician to test a network card?

Loopback plug


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What tool can help you find out which wall jack connects to which port on a switch in an electrical closet?

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What is a hardware loopback adapter?

Something you plug into a port/ slot on a computer that tells it there is a network/connection active on the port but, it is just a facade created by the loopback adapter, you see them a lot in IT technicians tool bags


Which tool should you use to test the serial port?

You would use a Loopback Plug, this allow an output signal to be returned as input.


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What are loop-back plugs?

Exact definition of loop-back plugs will depend on what application we are talking about. Mostly these are connector plugs with a metal inside to short two electrical signals. There can be loopback plugs for different applications. These can be for a serial port or an Ethernet port or loopback plugs for specific signals on a connector or on a printed circuit board. These are very useful for debugging and testing an electronics problem. E.g. one can do a loopback on PC serial port's Transmit and Receive (Tx and Rx) lines using a loopback plug or a metal short to see if the serial port is working fine. Similarly Ethernet ports can be tested with a loop-back plug made for the purpose. - Neeraj Sharma


What are loop back plugs?

Exact definition of loop-back plugs will depend on what application we are talking about. Mostly these are connector plugs with a metal inside to short two electrical signals. There can be loopback plugs for different applications. These can be for a serial port or an Ethernet port or loopback plugs for specific signals on a connector or on a printed circuit board. These are very useful for debugging and testing an electronics problem. E.g. one can do a loopback on PC serial port's Transmit and Receive (Tx and Rx) lines using a loopback plug or a metal short to see if the serial port is working fine. Similarly Ethernet ports can be tested with a loop-back plug made for the purpose. - Neeraj Sharma


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What is used to test a serial parallel USB network or other port?

Techkid is right--it's a loopback plug also called a loopback adapter. They monitor and test a transmission of electrical or data current (meaning electricity) from it's starting point all the way back to the completion, thus making a circuit. It's part of the Comp-Tia A+ test. (P.S. to the first guy who answered, if you don't know the answer, please don't answer it. No offense, but for a Wiki to be accurate, it has to have the right information.) loop-back plug is correct i think a dianostic card no... the answer is the loop back plug. Diagnostic card is an adapter card designed to discover and report computer errors


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