JetStream™ 28-port Pure-Gigabit L3 Managed Switch, 24 10/100/1000Mbps RJ45 ports including 4 combo Gigabit SFP slots, 2 integrated 10G SFP+ Slots, 2 optional 10G SFP+ Slots. Abundant L3 routing protocols including Static Routing/RIP/OSPF/ECMP/VRRP, True Physical Stacking up to 8 units, Port/Tag/Voice/Protocol-Based VLAN, Q-in-Q(Double VLAN), GVRP, STP/RSTP/MSTP, PIM-SM/PIM-DM, IGMP V1/V2/V3 Snooping, COS, DSCP, Rate Limiting, 802.1x, IEEE 802.3ad, L2/3/4 ACL, Port Mirroring, IP Source Guard, SSL, SSH, CLI, SNMP, RMON, 1U 19-inch rack-mountable steel case