This guide covers every dimension of the SMF vs MMF decision: the physics of how light propagates differently in each type, the complete distance and bandwidth specifications, colour coding and how to tell them apart, patch cord compatibility, real-world pricing, the. This guide covers every dimension of the SMF vs MMF decision: the physics of how light propagates differently in each type, the complete distance and bandwidth specifications, colour coding and how to tell them apart, patch cord compatibility, real-world pricing, the. There are two main types of fiber optic cables: single mode and multimode. Although they can do the same job in some instances, the different construction methods make each of them better suited to certain tasks and budgets. That makes picking between single mode and multimode fiber optic cables an. But not all fiber cables are created equal: multimode (MM) and single mode (SM) fibers are the two primary types, each engineered for specific use cases, from short-range data center connections to transcontinental telecom backbones. The choice of fiber optic cable depends on the specific needs of the application, as well as the. The two main types— single-mode and multimode fiber—serve different applications depending on distance, bandwidth, and cost requirements. This guide compares singlemode vs. Single Mode has a small 9µm core for long-distance (up to 100km) high-speed data.