Network Discovery and Port Scanning with Nmap

Understanding what is running on your network is the first and most critical step in securing it. This course introduces you to the essentials of network reconnaissance using Nmap, the industry-standard tool for port scanning and host discovery. You will transition from having zero networking knowledge to confidently scanning networks, interpreting scan results, and identifying potential security gaps. By reading through clear explanations and working through guided text-based exercises, you will learn how to map out networks safely and ethically. What you'll learn: Understand foundational networking concepts, TCP/IP handshakes, and port states; Scan networks using various techniques like SYN, TCP connect, and UDP scans; Identify active services, operating systems, and potential vulnerabilities; Apply the Nmap Scripting Engine (NSE) to automate basic security audits; Analyze scan results to detect unauthorized devices and open ports; Practice modern scanning best practices while respecting network boundaries. The course begins with core networking definitions and port states before guiding you through basic scanning commands. You will then progress to advanced scan types, script automation, and analyzing output to strengthen your network defense. This course is designed for absolute beginners in cybersecurity, system administration, or IT support, with no prior network scanning experience required. Start reading today to build a strong foundation in network security and reconnaissance.