IPv4/IPv6, 24-Port MiniGBIC/SFP Gigabit Layer2/L4 Advance SNMP Manageable Switch + 8-Port 10/100/1000Base-T, trunking stack up to 16 Units, w/-48V Redundant Power. Hardware Stacking / IPv6 / 802.1Q VLAN / Q-in-Q / MSTP / IGMP Snooping / ACL / RADIUS / TACACS+ / SSH / SSL / SNMPv3 / POE