28 Port Managed Layer 3 Gigabit Ethernet Switch supporting 802.3af and Legacy Power over Ethernet. Includes 24 -10/100/1000Base-T access ports and 4 - Enhanced SFP Gigabit (1Gbps/2.5Gbps) Ethernet Ports. Features include 802.1Q VLANs, GVRP, 802.1p QoS, 802.1w Rapid Spanning Tree, 802.3ad Link Aggregation, Auto MDI/MDI-X, CLI, HTTP GUI, SSH, SSL, RADIUS, SNMP. Provides up to 15.4 watts/port (370 watts) of 802.3af(PoE) and 802.3at(PoE+) compliant power. 19" Rackmount 1U housing. Supported SFP modules include1000Base-SX (1200480E1),1000Base-LX (1200481E1), 2.5 Gbps MM (1200482G1), 2.5 Gbps SM (1200483G1) and SFP interconnect cable (1200484Gx).