How to Check Crossover Cable
A crossover cable is a type of Ethernet networking cable that is specifically used to create a wired connection between two computers. As opposed to connecting both computers to a router to create the network, a crossover cable is simply connected to each device to achieve the same effect. A crossover cable must be connected properly to work, so if your computer-to-computer network has gone down, you'll need to check these connections to see what went wrong.
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Instructions
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Examine one end of the crossover cable as it is connected to your first computer. The plastic clip that protects the wires inside the crossover cable should be pushed firmly into the Ethernet input on your computer. Unplug the cable, make sure the plastic clip is intact and isn't cracked, and plug the cable back in until you hear a "click" sound.
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Examine the other end of the crossover cable as it is connected to your second computer. As with the first end of the cable, you'll need to unplug the cable, make sure that the plastic clip is intact and not cracked, and plug the cable back in until you hear a "click" sound.
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Purchase an Ethernet cable tester from an electronics store or hardware store. Ethernet cable testers will check the wire to make sure it is capable of transmitting the data it needs to create a network. Both ends of the cable get plugged into the cable tester, at which point the device will send a packet of data from one end to the other. If the data was transmitted successfully, a green indicator light will come on. If the data was not transmitted successfully you will see a red light, which means that you need to purchase a replacement crossover cable.
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