Multimode fiber is a common choice to achieve 10 Gbit/s speed over distances required by LAN enterprise and data center applications. With so. For example, OM1 supports a 1Gbps speed with a 275MHz bandwidth, while OM5 handles 100Gbps with a 2GHz bandwidth. OM3 and OM4 stand out for their suitability in data centers, supporting 10Gbps over 300 and 400 meters, respectively. OM5, optimized for high-density environments, supports multiple. These differences include the maximum distance and speed, the standard release date, the modal bandwidth, the size of the fiber core, the color of the fiber jacket, and the typical applications from a data rate perspective. Most multimode fiber types used today are OM3/OM4 and OM5, but there are. OM3, OM4, and OM5 are types of multi-mode optical fibres commonly used in data centres and enterprise environments to support various network speeds and transmission distances, including 10 gigabit Ethernet (10G), 40 gigabit Ethernet (40G), 100 gigabit Ethernet (100G) and 400 gigabit Ethernet. This guide explains the five generations of multimode fiber - OM1, OM2, OM3, OM4, and OM5 - covering their physical characteristics, color coding, bandwidth, maximum distances at different data rates, optical sources (LED, VCSEL, SWDM), and real-world applications in enterprise networks and data. This means that the cable can transmit data over distances of up to 10 kilometers without the need for additional signal amplification at a speed of up to 10 gigabits per second (Gbps).