This is a fast Ethernet PCIe x1 network interface card with a single ST port operating at 100Base-FX that complies with all IEEE 802.3 standards. It provides a high bandwidth 100Mb network speed that fully supports high-end servers. In addition, this supports high level VLAN filtering. Based on the Intel 82574 chipset, it is compatible with Windows, Linux, FreeBSD, and VMware operating systems. The SC port operates over multi-mode fiber (MMF), allowing an operating distance of 2km. Our 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 our certification test program, we can guarantee your product will work right the first time.