# nmap > Network exploration tool and security / port scanner - scan open ports of a single host `nmap {{192.168.0.1}}` - discover hosts in the 192.168.0.X area (no port scan) `nmap -sn {{192.168.0.1/24}}` - faster scan of a single host (scans for common ports) `nmap -F {{192.168.0.1}}` - faster scan of a subnet (scans for common ports) `nmap -F {{192.168.0.1/24}}`