. The industry-standard Cisco Small Form-Factor Pluggable (SFP) Gigabit Interface Converter is a hot-swappable input/output device that plugs into a Gigabit Ethernet port or slot linking the port with the network (Figures 1 2 & 3). SFPs can be used & interchanged on a wide variety of Cisco products & can be intermixed in combinations of 1000BASE-T 1000BASE-SX 1000BASE-LX/LH 1000BASE-EX 1000BASE-ZX or 1000BASE-BX10-D/U on a port-by-port basis..