TP-Link JetStream 24-Port Gigabit Ethernet Smart Switch with 4-10GE SFP+ Slots (T1700G-28TQ) True physical stacking supports up to 6 units and 40Gbps bi-directional bandwidth for high scalability and efficient redundancy 10G SFP+ ports for stacking and/or uplink, providing support for high-bandwidth applications for congestion relief and smooth data delivery L2+ feature, Static Routing help route internal traffic for more efficient use of network resources Advanced security features include IP-MAC-Port Binding, ACL, Port Security, DoS Defend, Storm Control, DHCP Snooping, 802.1X, and Radius Authentication IPv6 support provides dual IPv4/IPv6 stacking, MLD snooping, and IPv6 neighbor discovery WEB/CLI managed modes, SNMP, RMON, and Dual Image enhance management