SPF is the acronym for Small Form-Factor Pluggable which refers to a typology of optical connectors with hot-plug connections. SFP+, the evolute version of SFP (enhanced SFP), supports a bandwidth of 16Gbps and can be used to create 8GBps optical fibre connections, 10GBps Ethernet and Optical Transport Network with the OTU2 standard. SFP+ also saw the introduction of the support to Direct Attach which allows to link two SFP+ ports without dedicated transmitters.

SFP+ connectors are often found in higher tier products as it’s a widespread interface adopted by the main manufacturers of network devices.