Multimode fiber cable is a type of optical cable used for high-speed data transmission over short distances. It is widely used in local area networks, data centers, and other applications where high-bandwidth connectivity is required. Multi-mode fiber has a fairly large core diameter that enables multiple light modes to be. ISO/IEC 11801 defines the OM1, OM2, OM3, OM4, and OM5 types of multimode fiber. 5 microns, compared to the ~9-micron core in single-mode fiber. The wider core accepts light from. While single-mode fiber (SMF) dominates long-distance and carrier-grade infrastructure, multimode fiber remains the most cost-efficient and practical choice for enterprise buildings, campus networks, and modern data centers.