Question: what are tools for network monitoring?
Answer: SolarWinds Network Performance Monitor (FREE TRIAL) ... 
Datadog Network Performance Monitoring (FREE TRIAL) ... 
ManageEngine OpManager (FREE TRIAL) ... 
Paessler PRTG Network Monitor (FREE TRIAL) ... 
Atera. ... 
Site24x7 Cloud Network Monitoring System. ... 
Nagios Core. ... 
Zabbix.