Fiber is the fastest, greenest, and most widely deployed broadband technology in the world today. In a fiber broadband network, pulses of light are used to transmit data over fiber-optic cables made of very thin and very pure glass. The data literally travels at the speed of light, hence very high broadband speeds can be achieved. A single strand of fiber can carry several hundred colors of light, each representing a different signal or service. The technology behind it all is called Passive Optical Network, or PON for short. And while the technology is amazing, the fundamental principles of PON are not that complicated. Here’s an introduction to Passive Optical Network technologies.