https://www.paessler.com/Download_PRTG/30_Day_Trial
赞助PRTG monitors every aspect of your network: bandwidth, devices, availability, usage etc. Assure network performance & availability. PRTG uses SNMP, WMI, Packet Sniffing, NetFlow.
All-in-one monitoring · Easy and fast setup · All in one dashboard · Test it 100% and for free
Service catalog: Network Monitoring, Bandwidth Monitoring, Server Monitoring