Transition Networks Managed Hardened Gigabit Ethernet PoE+ Rack Mountable Switch - 24 x Gigabit Ethernet Network, 4 x Gigabit Ethernet Expansion Slot, 4 x 10 Gigabit Ethernet Expansion Slot - Manageable - Twisted Pair, Optical Fiber - Modular - 4 Layer Supported - Rack-mountable: