Network
nmap builder
Build an nmap command to scan your own network for devices, open ports and services, with an explanation for each option.
What does this mean?
nmap looks at which devices are in a network and which ports are open. Handy for checking your own home network or homelab: what is running, and is that intended? Fill in what you want to know; you will get the command with an explanation for each part.
Only scan what is yours or what you have permission for. Which port belongs to which service is in the ports cheat sheet. Dividing a network? Use the Subnet Calculator.