A Hacking Tool For Port Scanner

Nmap is an abbreviation of 'Network Mapper', as is a very well known free open source 

hackers tool. Nmap is used for network discovery and security auditing. Many system 

admins use nmap for network inventory, open ports, managing service upgrade schedules, 

and monitoring host or service uptime. The tool uses raw IP packets in creative ways 

to determine what hosts are available on the network, what services (application name and 

version) those hosts are offering, what operating systems (and OS versions and possible 

patches) and what type and version of packet filters/ firewalls are being used by the target.

Nmap is a very popular hacking tool that was originally created to act as a method of being 

able to scan large networks, but it works absolutely fine o single hosts (targets). Nmap 

works on all major computer operating systems, and official binary packages are available 

for Linux, Windows, and Mac OS X. Nmap was traditionally a command-line tool, but there 

is a GUI available called 'Zenmap'.