There's no magic number as to how many devices fiber internet can support. In theory, optical fibers can handle terabits of data every second, and in experimental settings, this number has skyrocketed. Fiber internet, unlike traditional copper connections, uses fiber-optic cables to transmit data via light signals. This results in ultra-fast speeds, greater reliability and significantly lower latency. Future-proofing: Consider potential future growth in connected devices. General. Fiber-optic communication is a form of optical communication for transmitting information from one place to another by sending pulses of infrared or visible light through an optical fiber.