A twisted pair is two conductors of a single circuit that are twisted together to help reduce the interference caused by other devices and equipment, like fluorescent lights and appliances. This interference can create crosstalk between the circuits, lowering the cable’s transfer speed (data rate). Ethernet cables that support up to 100 Mbps use two twisted pairs, while cables that support 1,000 Mbps or higher use four twisted pairs. All twisted pairs can have stranded or solid copper wires, depending on the target installation