Over Ethernet, how can I connect two computers without using a hub, switch, or existing network?

With Ethernet, you can use a crossover cable to connect two computers without using a hub, switch, or existing network. Crossover cables are Ethernet cables that have the send and receive wires (pins) switched along the length of the cable. The pins that send information from one computer are connected to the pins that receive information for the second computer. The Ethernet handles the switching.

You can purchase a crossover cable from many stores that specialize in computer equipment and cabling, but probably not from a department store with only a small electronics department. When making your purchase, make sure it's clearly labeled as a crossover cable, because a regular Ethernet cable won't work for connecting purposes.

Alternatively, you can have a crossover cable made for you (many electronics stores will do this), or you can make one yourself. You can find instructions and diagrams on the web to assist you. To see an example, visit:

For a chart of the UITS specifications for cables used at Indiana University Bloomington, see:

If you have a cable made for you, print out this chart to make sure the cable has the right specifications.

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