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 and 3).
SFPs can be used and interchanged on a wide variety of Cisco products and 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.
Real Cisco GLC network adapter. Note the bar code on the side.
Counterfeit Cisco 1000base-sx sfp/glc-sx-mm seized by US Customs.
With a simple label change, this common "Cisco Compliant" copy available in the internet for $22 would look virtually identical to the real $400 Cisco network adapter.
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