Nmap, short for Network Mapper, is a powerful open-source tool used primarily for network discovery and security auditing. It scans computers and networks to find live hosts, open ports, running services, operating systems, and even known vulnerabilities. System administrators, ethical hackers, and penetration testers widely use Nmap to map the structure of a network and detect unauthorized or vulnerable devices. It supports stealth scanning, firewall evasion, and brute-force detection technique