Introduction to Nmap

Nmap (Network Mapper) is a free and open-source tool used for network exploration, administration, and security auditing. It is designed to scan networks and systems to discover hosts and services on a network, as well as to identify vulnerabilities in systems and networks.

Nmap can perform a variety of functions, including host discovery, port scanning, service and operating system detection, version detection, and vulnerability scanning. It can also be used for network mapping, network inventory, and network monitoring.

Nmap uses a variety of techniques to perform its functions, including TCP and UDP scanning, ping sweeps, OS fingerprinting, and scripting engine. It supports various scanning modes, including stealth, fast, and aggressive scanning.

Nmap can be used on a wide range of platforms, including Windows, Linux, and macOS. It can be operated from a command-line interface or through a graphical user interface, and it can be extended with custom scripts and modules.

Nmap is a powerful tool that can be used for both legitimate and malicious purposes. Therefore, it should be used with caution and within legal boundaries.