What is the function of a coaxial cable?

The function of a coaxial cable is primarily to transmit data and video signals. This type of cable is designed with a central conductor that carries the signal, surrounded by insulation, a metallic shield, and an outer insulating layer. This structure allows coaxial cables to effectively minimize electromagnetic interference, making them highly suitable for transmitting high-frequency signals, including cable television, internet, and other types of high-quality data communication.

Coaxial cables are widely used because they can carry a significant amount of data over long distances with less signal loss compared to other cables. The cable's design supports high bandwidth, which is vital for modern communication systems that require fast and reliable data transmission.

In contrast, the other options do not accurately describe the primary function of coaxial cables. The cable is not designed for high voltage electrical signals, connecting telephone lines, or providing grounding for electrical devices, as these functions are typically served by other types of cables and specialized equipment. Understanding the specific purposes of different types of cables is crucial for ensuring proper installation and use in networking and communication systems.