Domain One sets the tone for the entire Security+ exam, introducing key cybersecurity principles like confidentiality, integrity, and availability. This episode breaks down control types, the CIA triad, authentication models, and concepts like Zero Trust and AAA. You'll also explore the different categories of security controls and see how foundational thinking supports higher-level problem solving throughout the test.

By the end of this episode, you’ll have a mental model of how cybersecurity works from a high level—and how to apply that model to real environments. This domain may be the lightest by percentage, but mastering it will make every other domain easier to understand and apply.