This document provides an overview of ethical hacking. It begins with an abstract that defines ethical hacking as assessing security vulnerabilities to improve protection. It then covers key topics like categories of hackers (white hat, black hat, grey hat), penetration testing, the methodology of an ethical hacker, and common hacking tools. The document emphasizes that ethical hacking tests systems with authorization to identify weaknesses before criminals can exploit them. It provides definitions and explanations of core concepts in ethical hacking to outline this growing field of security assessment.