Multi-mode fiber is a type of optical fiber designed to carry multiple light signals simultaneously. It has a larger core diameter than single-mode fiber, allowing multiple light paths or modes to travel through it. This makes it ideal for short-distance communication, such as within buildings or campuses. The primary advantage of multi-mode fiber is its ability to transmit data at high speeds over shorter distances, typically up to 2 kilometers. However, it is more susceptible to modal dispersion, which can limit its effectiveness for long-distance applications compared to single-mode fiber.