https://www.paessler.com/Download_PRTG/30_Day_Trial
AdPRTG takes care of all network management needs: an all-in-one tool for the entire network. PRTG sensors for network management: SNMP, packet sniffing, WMI, flow & many more sensors
All in one, no add-ons · Try it for free · Hosted version available · 30 day trial - no limits
Service catalog: Network Monitoring, Bandwidth Monitoring, Server Monitoring