ADD-PCIE-1SFP is a Gigabit Ethernet x4 Network Interface Card with a single open SFP Port 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 supports high level VLAN filtering. Based on the Intel 82574 chipset, it is compatible with Windows, Linux, FreeBSD, and VMware operating systems. The single open SFP port allows users to choose from a variety of SFP transceivers to accommodate multi-mode (MMF) or single-mode (SMF) fiber, allowing for customized reach. Add-on Computer's Network Interface Cards are 100% compliant for all of your networking needs. Now you have a cost effective solution to your network upgrade needs. With the Add-on Certification Test Program, Add-on Computer can guarantee your product will work right the first time.