That's it Nmap is a free, open source security scanner which is used to check the network and its security.
Use
- Network inventory
- managing schedules of the services offered
- reception monitoring
- or service uptime
Mode
It uses a series of IP packets that are sent and then collected information from those.
Nmap determines which machines are available on the network, what services or hosts they offer, which operating systems are in progress, what types of firewall are in use, and much more.
Download Nmap
https://nmap.org/download.html