24 SFP ports Layer 3 Stackable Managed Gigabit Switch with 2 x 10GBASE-T ports and 4 x SFP+ ports - Managed Gigabit Ethernet Switch - 24 x SFP ports - 2 x 10GBASE-T ports - 4 x 10G SFP+ ports - 4 Stacking ports, stacking cost 1 - 80Gbps stacking (up to 9 units/stack) - Optional redundant power supply (RPS) support (DPS-500A) - Ethernet Ring Protection Switching (ERPS) for single ring topologies - IEEE 802.1D/1w/1s Spanning Tree Protocol, 802.3ad Link Aggregation - Loopback Detection (LBD), Port Mirroring - Max. 16 IP interfaces ARP Proxy, VRRP - L3 Routing: Static Route, RIPv1/v2/ng - Double VLAN Q-in-Q - IGMP/MLD Snooping - 802.1p, Bandwidth Control - 802.1Q, Voice VLAN, Asymmetric VLAN, GVRP, Port/MAC-based VLAN, Super VLAN - SSH v2, Traffic Segmentation, ARP Spoofing Prevention, DHCP Server Screening, BPDU Attack Protection, Port Security, IP-MAC-Port Binding - Port/Host Based 802.1X, Identity-driven security policy assignment, Port/Host Based WAC/MAC, Microsoft NAP Support - Web-based GUI, Command Line Interface (CLI), SNMP - RMON v1/v2, DHCP Auto-configuration, Flash file system, LLDP, DHCP Relay, Multiple images/configuration - ACL, Time-based ACL - Embedded 6 kV surge protection on all Gigabit Ethernet ports.