Knowns and unknowns influence cybersecurity by shaping how threats, vulnerabilities, risks, and security decisions are understood. Recognizing established facts, identifying uncertainty, uncovering overlooked information, and preparing for unexpected conditions helps improve security awareness and decision-making.
The CIA Triad is a foundational cybersecurity model that defines three essential objectives for protecting information and systems: Confidentiality, Integrity, and Availability. These principles provide a basis for evaluating security requirements, understanding threats, designing security controls, and establishing how cybersecurity domains and controls collectively protect information and support secure operations.
Cybersecurity domains represent the major disciplines that collectively protect digital systems, information, and infrastructure. Understand the purpose of each domain, their core responsibilities, how they interconnect, and why a domain-based approach provides a structured framework for learning, implementing, and managing cybersecurity effectively.
Cybersecurity protects systems, networks, applications, devices, and data from cyber threats while ensuring confidentiality, integrity, and availability. Understand its importance, core principles, security objectives, and the essential role it plays in safeguarding digital assets, maintaining trust, supporting business continuity, and enabling a secure digital world.