From the basics, SFP stands for Small Form Factor Pluggable. It is also commonly known as mini-GBIC (Gigabit Interface Converter). SFPs are a popular transceiver for three main reasons. The first is a small size. Its size allows it to be used in tight network spaces to provide fast communication between switches and important network components. The second reason for its proliferation is the variety of SFP connectivity options. SFPs work with copper or fiber optics. Networks that cannot use SFP are scarce. Finally, SFPs are hot-pluggable. This makes it ideal for expanding or adapting existing networks without redesigning the entire cable infrastructure.