D-Link 28-Port Layer 3 Stackable Managed Gigabit Fiber Switch - 20 x SFP ports - 4 x Combo 10/100/1000BASE-T/SFP ports - 4 x 10G SFP+ ports - 6 kV Surge Protection - MPLS L2VPM/L3 VPN support (DGS-3630-28SC/SI)