In general, SFP modules are used for 1G links, SFP+ transceivers are mainly used for 10G, and SFP28 are used for 25G. For a quick comparison of typical speeds and application. Among the most widely deployed form factors are SFP, SFP+, SFP28, QSFP+, and QSFP28, which together support Ethernet speeds ranging from 1Gbps to 100Gbps. FS 40G QSFP+ optical transceiver module solutions offer a full range of QSFP+ modules from 150m to 80km reach, and used for high-density switching, routing and data center applications. It explains their technical differences, compatibility considerations, and ideal use cases to help readers choose the right module for enterprise and data center. This simple guide is going to help you map the differences between SFP, SFP+, QSFP and QSFP+. With it, at least some of your networking decisions should come a little more easily. What Is an SFP Module and What Role Does It Play in Network Infrastructure? What Are the Differences Between. Short answer: one QSFP cage replaces four SFP cages yet moves the same cables out front. My lab logged a 3 °C lower intake temp after swapping 4 × SFP-28 for 1 × QSFP-28. Higher force means two hands and clear finger space.