All Gigabit Ethernet ports for 4 Copper and 4 SFP SFP sockets for easy and flexible fiber expansion Main FeaturesAll Gigabit Ethernet ports for 4 Copper and 4 SFP SFP sockets for easy and flexible fiber expansion Redundancy: Gigabit X-Ring (ultra high-speed recovery time < 10ms), RSTP/STP (802, 1w/1D) Management: Web, Telnet, Serial Console, SNMP Control: VLAN/GVRP, QoS, IGMP Snooping/Query, LACP ...