D-Link 28-Port Layer 3 Stackable Managed Gigabit Switch including 4 10GbE Ports - 24 Ports - Manageable - Stack Port - 8 x Expansion Slots - 10/100/1000Base-TX, 10GBase-SR, 10GBase-LR, 1000Base-LX, 1000Base-SX, 10GBase-LRM - Modular - 24 x Network, 4 x Expansion Slot, 4 x Expansion Slot - Optical Fiber, Twisted Pair - Gigabit Ethernet, 10 Gigabit Ethernet - Shared SFP Slot - 4 x SFP Slots - 4 x SFP+ Slots - 3 Layer SupportedLifetime Limited Warranty: