The 100FX SFP module for GE (Gigabit Ethernet) ports provides optical links up to 2 km long using multimode fiber cable. Optical and copper models can be used on a wide variety of Cisco. As an advanced network transmission technology, Gigabit multi-mode SFP-GE-SX stands out in the field of network communications with its high speed, flexibility and high cost performance. In the previous article, we introduced the definition, transmission distance, parameters, and application fields. Each SFP transceiver module is individually tested to be used on a series of FS switches, routers, servers, network interface card (NICs) etc. GLC-GE-100FX exists specifically to. SFP Optical Modules (Small Form-factor Pluggable) are compact, hot-swappable transceivers used for telecommunication and data communication applications.