What is Fiber Internet? Fiber-optic internet, often known as just “fiber”, is exactly what it sounds like: small glass strands less than the size of a human hair which transmit data using light and stretch across cities, states, and countries to transmit information. These fiber cables can be hung from utility poles or buried underground and are eventually connected directly to your home or business to deliver internet at lightning-fast speeds. Did you say light? Yes, yes we did. When you break fiber-optic internet down to the bare bones of what it is, fiber internet is data being transmitted to your home by light. Not copper wiring or airwaves; light. Now of course, this is no easy feat. The light travels the fiber-optic strands mentioned earlier, bouncing off the glass at an extremely shallow angle of less than 42 degrees. It then reflects back in a similar way to how light interacts with a mirror or a prism. This allows the light to ricochet its way straight to your devices.