AddOn Network Upgrades ADD-PCIE-1SFP-X1 is a single open SFP Port Gigabit Ethernet x1 Network Interface Card that complies with all IEEE 802.3 standards. It provides a high bandwidth 1Gb network speed that fully supports high-end servers. In addition, the ADD-PCIE-1SFP-X1 supports high level VLAN filtering function, and is compatible with Windows, Linux, FreeBSD, and VMware operating systems. The single open SFP Port slot operates over MMF/SMF, allowing a customizable distance reach.AddOn's Network Interface Cards are 100% compliant for all of our networking needs. Now you have a cost effective solution to your network upgrade needs. With our ADDON CERTIFICATION TEST Program, we can guarantee your product will work right the first time.