Electrical and data communication systems utilize numerous specialized cable configurations designed for specific operational environments. Ten common types of cables include coaxial cables (used for television and broadband signals), twisted pair cables (standard for Ethernet computer networks), fiber optic cables (utilizing light pulses for high-speed internet data), shielded cables (protected from electromagnetic interference), armored cables (featuring metal sheathing for industrial burial), ribbon cables (flat multi-wire internal computer cables), flexible power cords, speaker wires, direct burial cables, and high-voltage submarine power cables.