These cables are created when pairs of wires are twisted around each other to protect and cancel out interference from each other and outside sources?

• A. UTP Cables
• B. Cat3
• C. Coaxial Cables
• D. Fiber Optic Cables

Answer: (A)

Twisted-pair cabling uses pairs of wires twisted together to cancel interference from external sources and reduce crosstalk. The twisting causes noise picked up on the wires to be similar on both conductors, allowing a balanced or differential receiver to reject it and preserve the intended signal. This is the defining characteristic of Unshielded Twisted Pair (UTP) cables, which are the common Ethernet cabling you’ll encounter. Coaxial cables rely on shielding rather than twisted pairs, and fiber optic cables use light transmission, not electrical twisting. Cat3 is a specific category of twisted-pair cable, but the concept described points to twisted-pair cabling in general, as embodied by UTP.