Layer 3 Managed 24 Ports 10/100/1000M PoE Switch, 24 Gigabit Ethernet ports + 4 10 Gigabit uplink SFP+ optical ports + 1 USB serial port + 1 console port, 1-24 ports conform to IEEE 802.3af/at, 400W PoE budget, backplane bandwidth 128Gbps, L3+ Layer 3 network management function, support routing, DHCP, VLAN, MAC address, ACL access control, QOS, multicast, storm suppression , IPV4/IPV6 and other business functions, support ring network, ultra-fast detection and self-healing functions, support 802.1X authentication, ARP intrusion detection, IP source protection, DoS protection and other security control strategies, support STP/RSTP/MSTP spanning tree protocol, dynamic /Static link aggregation and other network protection functions, support Web/Telnet/CLI/SSH management and maintenance, 1U rack type