The CISSP Common Body of Knowledge (CBK) is a comprehensive framework that outlines the essential concepts and practices in the field of information security. It serves as a foundation for the Certified Information Systems Security Professional (CISSP) certification, ensuring that professionals possess a well-rounded understanding of security principles. The CBK is divided into eight domains, including security and risk management, asset security, and security architecture and engineering. Each domain covers critical topics that security professionals must be familiar with to effectively protect information systems and manage security risks in various environments.