TROUBLESHOOTING COMPUTER ISSUES
IDENTIFYING HARDWARE SOFTWARE NETWORK PROBLEMS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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What do you use a loopback plug for?
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To test data transmissions between components
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To check that a disk drive interface is operating correctly
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To check a power supply’s optimal voltage range
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To help “burn-in” a computer and its components prior to shipment to a buyer
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Explanation:
Detailed explanation-1: -A loopback plug is a connector used for diagnosing transmission problems on parallel and serial ports.
Detailed explanation-2: -A loopback plug is a device used to test ports (such as serial, parallel USB and network ports) to identify network and network interface card (NIC) issues. Loopback plug equipment facilitates the testing of simple networking issues and is available at very low costs.
Detailed explanation-3: -To test a port or cable, connect one end of the cable to a network port on a computer or other device, and connect the loopback plug to the other end of the cable (see Figure 15-22). If the LED light on the loopback plug lights up, the cable and port are good.
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