Fiber-optic communication networks use thin strands of glass or plastic, known as fiber optics, to transmit data as light signals. This technology allows for high-speed data transfer over long distances with minimal loss of signal quality. Fiber-optic cables are less susceptible to interference compared to traditional copper cables, making them ideal for internet, television, and telephone services. These networks consist of a transmitter that converts electrical signals into light, which travels through the fiber optic cables to a receiver that converts the light back into electrical signals. The use of fiber optics has revolutionized telecommunications, enabling faster and more reliable communication worldwide.