Black Box Gigabit Managed Ethernet SFP Fiber Switch - 28-Port - 20 x Gigabit Ethernet Expansion Slot, 4 x Gigabit Ethernet Network, 4 x 10 Gigabit Ethernet Expansion Slot - Manageable - Optical Fiber, Twisted Pair - Modular - 2 Layer Supported - 1U High - Rack-mountable - 1 Year Limited Warranty - TAA Compliant: