Cable is made up of individual conductors (wires) bundled together. The conductors can be copper (for electrical wires) or glass/plastic (for fiber optic light transmission). The bundle can be jacketed with an overmolded cover or held together by tie-wraps, bands of tape, or plastic/metal braiding, to name a few options. Copper wires in cables are often configured in twisted pairs for improved electrical performance. Coaxial cables have a center conductor surrounded by a dielectric which is then surrounded by a metal foil or braided second conductor which also acts as an electrical shield. All cables have one thing in common – they conduct signals and/or power.