ISC Security Architecture Modeling Practice Question
When designing an architecture, which principle states that a system should be designed to be secure even if other security measures fail?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Defense in depth
Defense in depth ensures that if one layer fails, others remain to protect the system.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Separation of duties
Why it's wrong here
Refers to task division.
- ✓
Defense in depth
Why this is correct
This involves layering security controls.
- ✗
Principle of Least Privilege
Why it's wrong here
Refers to access rights.
- ✗
Fail-safe defaults
Why it's wrong here
Refers to denying access by default.
About these practice questions
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JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed August 2026 · checked against the official (ISC)² exam blueprint
This ISC practice question is part of Courseiva's free (ISC)² certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the ISC exam.