D-link 28-Port Gigabit PoE+ Smart Switch including 4 SFP Ports; Power budget 370W; 24 x PoE+ 10/100/1000Mbps; 4 x SFP Auto-Negotiating Ports; Port 1-24 802.3at up to 30W; Advance power saving features; Half-/Full- Duplex, auto-negotiation, Auto MDI/MDIX; IEEE 802.3x Flow Control - 802.3ad Link Aggregation; Asymmetric VLAN; Voice VLAN; Jumbo frame 9,216 Bytes; Switching capacity 56 Gbps; 802.1p priority queues; MAC Address table size 16k; Static MAC Addresses 256; Static multicast addresses 64; MAC/IP filtering; MAC/IP-based ACL 200 rules (Port List; 802.1X port-base Access Control, Port Security; LLDP, LLDP-MED, Smart Binding, Traffic Segmentation; IPv6 configurations; D-Link Safeguard Engine; Smart Console Utility, web based management, compact CLI; DNA utility; 19" Rackmount Installation; IEEE 802.3az EEE.