Defense in depth
Also called: layered defense
Course: AP® Cybersecurity Shows up in: Unit 2: Securing Spaces
A strategy that uses multiple types of security controls in layers, so if one is bypassed another still protects the asset.
Appears in the course and exam description (CED): 2.1.G.12.1.G.32.1.G.4
Why it matters in Unit 2
Layers include human, physical, network, device, application and data.
Example
Stolen password, but MFA blocks the login; if MFA fails, encryption still protects the files.
Learn it properly, with a checkpoint 2.1 Cyber Foundations