Final answer:
The wire positions are exactly reversed in one of the two RJ-45 terminations in a crossover cable, which is used for connecting similar devices directly.
Step-by-step explanation:
In a crossover cable, the usual wire positions are exactly reversed in one of the two RJ-45 terminations.
This type of cable is used to connect two similar devices directly, such as a computer-to-computer or switch-to-switch connection. Unlike a straight-through cable that uses the same pin configurations on both ends, a crossover cable has two ends with the wire positions reversed to ensure the transmit and receive signals are appropriately aligned on both devices. Coaxial and fiber optic cables are different types of cables used primarily for audiovisual connections, like cable TV, but they are not configured in the way described in the question.