28-Port Gigabit PoE+ Smart Managed Switch including 4 x 100/1000Mbps Combo Ports - 24 x PoE 10/100/1000Mbps Auto-Negotiating Ports - 4 x Combo 1000BaseT/Mini-GBIC SFP ports -PoE Budget 370W - Static route - Surveillance Mode - Auto Voice VLAN - Dual software images - Dual configuration files - 24 x PoE+ 10/100/1000Mbps - 4 x SFP Auto-Negotiating Ports - Port 1-24 802.3at up to 30W - Half-/Full-Duplex, auto-negotiation, Auto MDI/MDIX - IEEE 802.3x Flow Control - 802.3ad Link Aggregation - 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 - D-view 7.0 support - IE