Network Enumeration and Scanning with Nmap

Understanding what is running on a network is the first and most critical step in securing it. This text-based course guides you through the core principles of network enumeration and security scanning using Nmap, the industry standard for network discovery. You will learn how to safely and effectively probe networks, identify active hosts, and discover open ports and services. Transition from a beginner to a confident practitioner by understanding exactly how scanning packets interact with target systems. Learn how to perform basic host discovery and port scanning. Understand how to identify running services and operating systems. Explore the Nmap Scripting Engine to automate basic vulnerability scanning. Practice modern scanning techniques that respect network bandwidth and avoid common detection triggers. Understand how to interpret scan results to identify potential security gaps. We begin with foundational networking concepts, explaining ports, protocols, and the TCP/IP handshake before running your first scan. From there, you will progress through structured written explanations and practical command examples that demonstrate how to customize scans for various network environments. This course is designed for beginners, aspiring system administrators, and entry-level security analysts who want to build a solid foundation in network reconnaissance without any prior scanning experience. Start reading today to master the essentials of network discovery.