What will you learn from this book? The fundamentals of cybersecurity: types of attacks, threats, and defense mechanisms. A practical introduction to penetration testing (pentesting) – methodology, phases, and tools. Hands-on explanations of popular tools such as Nmap, Hydra, Wireshark, and more – presented strictly for educational purposes. Real-world examples of encryption, password protection, and identifying weak points in systems. Modern approaches: social engineering, network security, and common web vulnerabilities. Prevention strategies: how to properly secure systems, what tools to use, and which mistakes to avoid.