Network Monitoring Softwares

Here in this link some network monitoring opensource softwares are dercribed. 7 free tools every network needs the title tells its importance by itself.

http://www.networkworld.com/article/2825879/network-management/7-free-open-source-network-monitoring-tools.html

Very good site having all information you neet on cyber security...

http://cromwell-intl.com/cybersecurity/monitoring.html

Here wire-shark for windows based network monitoring tool is also described which I used in IP checking of my FPGA Kit