Fiber, also known as optical fiber, is a lightweight and flexible medium used for high-speed data transmission. Made of glass or plastic, fiber-optic cables carry information through pulses of light, allowing for faster, more reliable connectivity.

With its immense bandwidth capacity, fiber is the backbone of modern telecommunications systems, supporting industries like telecommunications, internet service providers, and data centers. Fiber-optic technology offers greater speed, longer distances, and better resistance to electromagnetic interference compared to traditional copper cables.