S21-4GP2G
*4*1000Mbps PoE ports
*2*1000Mbps Uplink port
*Support L2 management, such as VLAN, QoS, IGMP Snooping and PoE management
*WEB, TELNET, CLI management
S21-8FP2G
*8*100Mbps PoE ports and 2*1000Mbps Uplink ports
*Support PoE management
*Support WEB
*Port lightning protection 4KV
S21-16GP2G2S
*16*1000Mbps PoE ports
*2*1000Mbps Uplink ports
*2*1000Mbps SFP ports
*Support L2 management, such as VLAN, QoS, IGMP Snooping and PoE management
*WEB, TELNET, CLI management
S21-24GP2G2S
*24*1000Mbps PoE ports
*2*1000Mbps Uplink ports
*2*1000Mbps SFP ports
*Support L2 management, such as VLAN, QoS, IGMP Snooping and PoE management
*WEB, TELNET, CLI management