What is UTP commonly used for?

The correct response highlights that UTP, or Unshielded Twisted Pair, is primarily known for its use in networking cables, which include telephone lines and Ethernet connections. UTP cables are designed to transmit data effectively by twisting pairs of wires together, which helps to reduce electromagnetic interference and crosstalk between the pairs.

This type of cabling is widely used in various networking applications, including local area networks (LANs) and telecommunications, making it a fundamental part of modern networking infrastructure. Its cost-effectiveness and ease of installation further contribute to its popularity among network professionals.

In contrast, other options are not representative of UTP's main use. For example, high-frequency data transmission typically requires more specialized cabling, and wireless communication does not involve physical cables. Fiber optic connections utilize different types of technology altogether, relying on light to transmit data rather than electrical signals conducted through copper wires like those found in UTP.