Network Mapper (NMAP) is a security scanner used to discover hosts and services on a computer network.
Nmap (Network Mapper) is a free and open-source security scanner, originally written by Gordon Lyon (also known by his pseudonym Fyodor Vaskovich), used to discover hosts and services on a computer network, thus building a "map" of the network. To accomplish its goal, Nmap sends specially crafted packets to the target host(s) and then analyzes the responses.
The software provides a number of features for probing computer networks, including host discovery and service and operating-system detection. …