• Fiber-optic cable which contains glass fibers surrounded by a layer of glass cladding and a protective outer jacket, is used to carry voice, video, and data transmission over long distances.
• Because of its capacity and reliability, fiber-optic cable is a popular transmission medium for highspeed long-distance transmission.
• Fiber-optic cable is too expensive to be used as a transmission medium for a small LAN, it is the transmission medium of choice for MANs and WANs.