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.