24-port 10/100 PoE Smart Switch + 2 Combo 1000BaseT/SFP + 2 Gigabit - 24-Port 100BaseTX Auto-Negotiating (NWAY) 10/100Mbps Switch - 2-Port Combo 1000BaseT/Mini-GBIC SFP ports - 2-Port 1000BaseT Gigabit Ethernet ports - 802.3af and 802.3at compliant - Port 1-4 support up to 15.4/30 watts per port - Port 5-24 support up to 15.4 watts per port - Power budget, 193 watts per device - Advance power saving features, time based PoE - IEEE 802.3x Flow Control - Auto-Polarity Correction - Half-/Full-Duplex - Port trunking, 802.1p Priority queues - MAC/IP filtering - MAC/IP-based ACL - 802.1Q VLAN, Auto Voice/Surveillance VLAN - LLDP, LLDP-MED - D-Link Safeguard Engine, DHCP server scerrning, ARP spoofing prevention, SSL v1/v2/v3 - Web based management and SNMP - 19" Rackmount Installation.