easyMultiple ChoiceObjective-mapped
ISC2 CC Practice Question: Decides to implement multiple security controls,…
An organization decides to implement multiple security controls, including firewalls, intrusion detection systems, and antivirus software. Which security principle does this represent?
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 uses multiple layers of security controls to protect assets. Option A (Least privilege) is about granting only necessary permissions. Option B (Defense in depth) is the correct answer as it employs multiple security layers such as firewalls, IDS, and antivirus. Option C (Risk avoidance) involves eliminating risk by avoiding risky activities. Option D (Separation of duties) divides critical tasks among multiple individuals to prevent fraud.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Least privilege
Why it's wrong here
Least privilege is a principle that restricts access rights to the minimum necessary to perform job functions. It is not about multiple security layers.
- ✓
Defense in depth
Why this is correct
Defense in depth is the correct answer. It involves implementing multiple layers of security controls to provide redundancy and protect against various threats.
- ✗
Risk avoidance
Why it's wrong here
Risk avoidance is a risk management strategy that involves avoiding activities that could introduce risk. It does not involve using multiple security controls.
- ✗
Separation of duties
Why it's wrong here
Separation of duties is a principle that prevents any single individual from having too much control by dividing responsibilities. It is not about multiple layers of security.
Go deeper
Related to this question
Learn chapter
Introduction to Security Principles
Key term
IDS
An IDS is a security system that monitors network or system traffic for suspicious activity and alerts administrators to potential threats, but does not actively block them.
Key term
Antivirus
Antivirus is software that detects, prevents, and removes malicious software (malware) from a computer or network.
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Same concept, more angles
1 more way this is tested on CC
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. Which TWO of the following controls are examples of defense in depth?
medium- A.Single sign-on
- B.Encryption at rest
- ✓ C.Network firewall
- ✓ D.Anti-malware software
- E.Strong password policy
Why C: Defense in depth uses multiple layers of security controls. Network firewall (Option C) provides network-level protection, and anti-malware software (Option D) provides host-level protection, together forming overlapping layers. Single sign-on (Option A) is an authentication convenience, not a security layer. Encryption at rest (Option B) is a data protection control but is not typically considered a separate layer in defense in depth; it is often categorized under data security. Strong password policy (Option E) is a procedural control that supports authentication but does not constitute a distinct defensive layer.
JA
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.