سوییچ داهوا مدل PFS421816GT190 Switch PFS421816GT190   Layer 2 network management PoE switch  Support IEEE8023af IEEE8023at standard  Support HiPoE 60W  Network Redundancy STPRSTPMSTP  Support IPv4IPv6 and DHCP  Network management based on SNMP  Configuration Web Telnet CLI Command  QoS IEEE8021p1Q CoSToS to Increase Determinism  Enhanced Network Security with IEEE8021X SNMP v1v2cv3 HTTPS and SSHSSL  Large data cache4M realtime transmission  MAC auto study and aging MAC address list capacity is 8K  EMC high protection design