Coaxial Cable is a type of wire and signal transmission line, generally made up of four layers of materials: the innermost layer is a conductive copper wire, surrounded by a layer of plastic (used as an insulator, dielectric), outside of the insulator there is a thin mesh conductor (usually copper or alloy), and then the outermost layer is the insulating material serving as the outer sheath.
Cable television broadcasting, long-distance telephone transmission, short-distance connections between computer systems, and local area networks, etc.
