Which type of cable is an example of transport media in a telecommunications network?

The correct choice is coaxial cable, which serves as an example of transport media in telecommunications networks. Coaxial cables are designed to carry high-frequency signals, making them suitable for transmitting broadband data, video, and voice communications. Their construction, which consists of an inner conductor, insulating layer, a metallic shield, and an outer sheath, helps in minimizing signal loss and electromagnetic interference, thus efficiently transporting data across distances.

While fiber-optic cable is also used as transport media and offers advantages such as higher bandwidth and longer transmission distances without loss, the question specifically identifies coaxial cable. Twisted pair cables are typically utilized for lower-speed applications and closer range connections, and Ethernet cables, often a type of twisted pair, are commonly used in local area networks rather than as core transport media.