= Small Form-factor Pluggable
{title2=SFP}
It's the thing that allows you to connect <fiber optics> into a compter, or the corresponding port for the thing.
Many of them can take two fibers as input/output because <fiber optics cables often come in pairs because it is needed for duplex>.
\Image[https://upload.wikimedia.org/wikipedia/commons/thumb/8/83/SFP_board_2.jpg/800px-SFP_board_2.jpg]
\Video[https://www.youtube.com/watch?v=llUiJ_NLb9Q]
{title=How to choose SFP transceiver for fiber optical cable by FASTCABLING}