Layer 2 Managed 28 Ports 10/100/1000M PoE Switch ,1-24 Port support POE (802.3at/af) ,with 4 Uplink Gigabit SFP/ETH Combo port + 1 Managed Port, IEEE 802.3af/at Standard, Each Port Max support 30W, Support QOS, STP/RSTP/MSTP? IGMP?SNMP?WEB?VLAN? EtherChanne?IGMP Snooping?DHCP?DHCPRelayAgent?AAA?VoiceVlan?GMRP?RMON?ERPS?POE Port Configuration?IP/MAC/PORT binding?ACL?802.1X approve?Port security?Port isolation?log information,management function, Bandwidth 56.0Gbps, Forwarding method: store and forward, MAC address: 8K,Standard 1U Chassis type, come with rack amount brackets, Watchdog, 400W Internal