SFP (small form- factor pluggable) is a compact hot pluggable optical module transceiver used for both telecommunication and data communication applications. A small transceiver that plugs into the SFP port of a network switch. Superseding the GBIC transceiver, SFP modules are also called “mini-GBIC” due to their smaller size.
SFP ports enable Gigabit switches to connect to a wide variety of fiber and Ethernet cables in order to extend switching functionality throughout the network. Small form-factor pluggable, or SFP, devices are hot-swappable used primarily in network and storage switches.