Final answer:
Gigabit Ethernet uses four pairs of twisted-pair wires for transmission, with each pair carrying 250 megabits per second to achieve a total of 1 gigabit per second.
Step-by-step explanation:
In Gigabit Ethernet, which is a version of Ethernet technology that can theoretically transmit data at a rate of 1 gigabit per second, four pairs of twisted-pair wires are used for transmission. Specifically in the 1000BASE-T standard, all four pairs are utilized, where each pair is capable of carrying 250 megabits per second, adding up to the total of 1 gigabit per second. It is important to note that not all Ethernet cables have the capability to support Gigabit Ethernet speeds; Category 5e or higher (such as Cat 6 or Cat 7) cables are required for reliable performance at this speed.