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Ethernet Cables

Ethernet crossover cables are most often used in home networks when connecting two Ethernet computers without a hub. Ethernet crossover cables have its send and receive wires crossed. When using a hub or switch, this is automatically done for you.

Devices like cable and dsl modems have their actual Ethernet plugs reversed. This is to allow people to hook up a cable modem to a computer without a special crossover cable. When adding a hub into the mix, the issue can get confusing.

Most modern hubs and switches have what is called an uplink port on them. This is the same kind of reversed port that is on a cable or dsl modem.