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ISC2 CC Practice Question: Designing a secure network architecture for its…
A company is designing a secure network architecture for its new headquarters. The security team proposes implementing multiple layers of security controls, including firewalls, intrusion detection systems, and access control lists. Which security principle is being primarily applied?
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 is the correct principle because it involves implementing multiple layers of security controls (firewalls, IDS, ACLs) to protect assets, ensuring that if one layer fails, others still provide protection. Separation of duties (B) divides tasks among multiple people to prevent fraud, least privilege (C) limits access rights to only what is necessary, and need-to-know (D) restricts access to information required for job functions—none of these directly address the use of multiple security layers.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Defense in depth
Why this is correct
Defense in depth employs multiple overlapping security controls to protect assets.
- ✗
Separation of duties
Why it's wrong here
Separation of duties distributes critical tasks to prevent fraud, not multiple layers.
- ✗
Least privilege
Why it's wrong here
Least privilege restricts access rights but does not involve multiple layers.
- ✗
Need-to-know
Why it's wrong here
Need-to-know restricts access to information essential for job duties, not multiple layers.
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Related to this question
Learn chapter
Introduction to Security Principles
Key term
Detection
Detection is the process of identifying potential security incidents or anomalies by analyzing system data, logs, and network traffic.
Key term
Access control
Access control is the security practice of determining who or what is allowed to view, use, or enter a resource, and under what conditions.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This CC practice question is part of Courseiva's free ISC2 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 CC exam.