100BASE-FX is an Ethernet standard that supports 100 Mbps speeds over fiber optic cabling. 100BASE FX SFP remains a widely used solution for deploying 100Mbps fiber connectivity in industrial, enterprise, and legacy Fast Ethernet networks. While Gigabit and higher-speed optics dominate modern data centers, many control systems, surveillance networks, transportation infrastructure, and. In computer networking, Fast Ethernet physical layers carry traffic at the nominal rate of 100 Mbit/s. It is an improved version of 10BASE-T Ethernet, offering ten times faster than conventional Ethernet. 3 specifications of Project 802 developed by the IEEE. 3u standard, it uses multimode fiber (MMF) with SC, ST, or LC connectors for data transmission.