Twisted-pair cabling with the send and receive pairs of wires crossed. Crossover cables are primarily used for connecting hubs to each other. In addition, a small, two-station local area network (LAN) can be established by connecting two computers together with 10BaseT network interface cards (NICs) and a crossover cable. This configuration is often utilized when one computer is used to test the networking functions of another, since it allows the computer being tested to be isolated from the network. The illustration shows the pinning configuration of a crossover cable.