TP-LINK TL-SL5428E 24-Port 10/100Mbps + 4-Port Gigabit L2 Managed Switch with 4 Combo SFP Slots ACL, 802.1X Authentication, Port Security, IP Filtering, Storm control, DHCP Snooping, IP Source Guard and DoS Defend provide you robust security strategy Single-IP-Management supports virtual stack of 32 units L2/L3/L4 QoS and IGMP snooping optimize voice and video application SNMP, RMON, WEB/CLI/Telnet Log-in bring abundant management policies Link aggregation (LACP) increases aggregated bandwidth, optimizing the transport of business critical data Supports 4K active VLAN groups and 4K VLAN IDs Rate limiting confines the traffic flow accurately according to the preset value