48+4 port Gigabit switch with 48x 10/100/1000 Mbps, 4x 10G SFP+ slots to accommodate SFP/SFP+ modules (dual-speed), fanless, management via CLI (console, Telnet), web and SNMP, supports spanning tree (STP, RSTP, MSTP), IPv6, VLAN, LACP, IGMP, QoS, OAM according to IEEE802.3ah and IEEE802.3ag, including 19' mounting kit