Fundamentally, fiber internet is any internet access through fiber-optic lines. What makes this access unique is that, unlike DSL and cable internet services that transmit electrical information through copper lines, fiber-optic lines use tiny strands of plastic or glass (just slightly thicker than a single human hair) to carry binary transmissions of light. Binary is a number system where the combination of only two numbers—0 being “off” and 1 being “on”—represent more complex symbols or instructions. This method of data transmission makes fiber internet the best option for fast speeds and reliability.