Get advanced connectivity over multimode or single mode fiber by adding a 10gbase lrsr open sfp port to your server or workstation this fiber network card delivers reliable high performance network connectivity by adding an open sfp slot to your server or high powered workstation it provides an easy and cost effective way to upgrade your server or workstation to a 10 gigabit fiber network using the sfp module of your choice and gives you the flexibility to use either multimode or single