SFP (Small Form-factor Pluggable) electrical interface is a type of electrical interface used in optical transceivers. It is a compact, hot-pluggable transceiver used for both telecommunication and data communications applications. It is designed to support SONET, Gigabit Ethernet, Fibre Channel, and other communications standards. It is used to connect a host board to a fiber optic or copper networking cable. It is available in a variety of form factors, including SFP+, SFP28, QSFP+, and QSFP28. It is designed to provide high-speed, low-power, and reliable data transmission.