Fiber optic technology uses glass (or plastic) threads (fibers) to transmit data. A fiber optic cable consists of a bundle of glass threads, each of which is capable of transmitting messages modulated onto light waves. Fiber optic cables have a much greater bandwidth than metal cables, are less susceptible than metal cables to interference, are much thinner and lighter than metal wires, and allow for digital data transmission (the natural form for computer data) rather than analogical.