What Is Nmap?
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Nmap (short for Network Mapper) is a free and open source security utility created by Gordon Lyon (also known as Fyodor Vaskovich). It is used to discover hosts and services on a computer network by sending packets and analyzing the responses. It is capable of determining what hosts are available on the network, what services (application name and version) those hosts are offering, what type of packet filters/firewalls are in use, and dozens of other characteristics. The suite of tools can also be used for security auditing and penetration testing.
Nmap (Network Mapper) is a free and open-source security-auditing and network-discovery tool. It can be used to discover hosts and services on a computer network, by sending packets and analyzing the responses. It can be used for network inventory, managing service upgrade schedules, and monitoring host or service uptime. Nmap can be used to identify open ports, services running on those ports, operating systems, and the types of packet filters/firewalls in use.