48-Port Layer 3 Managed Gigabit Switch,48 Gigabit Ethernet ports + 4 10 Gigabit uplink SFP optical ports + 1 USB serial port + 1 console port, backplane bandwidth 176Gbps, three-layer 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 methods, 1U rack type