D-Link DGS-3120-24SC/SI Switch

24-port SFP Layer 2 Stackable Managed Gigabit Switch Including 8-port Combo 1000BaseT / SFP with Standard ImageMagick Managed Gigabit Ethernet SWITCH 24 x Mini-GBIC SFP Ports * Including 8 Combo 1000BaseT / Mini-GBIC SFP ports- two dedicated stacking ports for full-duplex 40Gbps stacking (up to 6 units / stack) - IEEE 802.1D / 1 watt / 1s Spanning Tree Protocol, 802.3ad Link Aggregation- LBD, Port Mirroring- IGMP / MLD Snooping- 802.1Q VLAN Voice, Asymmetric VLAN, GVRP, Port / MAC-based VLAN- 802.1p, Bandwidth Control-ACL, Time-based ACL- SSH / SSL, Traffic Segmentation, ARP Spoofing Prevention, DHCP Server Screening, BPDU Attack Protection- Port / Host Based 802.1X Identity- driven security policy assignment, Port / Host Based WAC / MAC, Microsoft NAP Support - SNMP, RMON v1 / v2, DHCP auto-configuration, Flash file system, LLDP, DHCP Relay, Multiple images / configuration- 1U height, 19 "Rackmount Installation