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ISC2 CC Practice Question: Which TWO of the following controls are examples…
Which TWO of the following controls are examples of defense in depth?
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
✓
Network firewall
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.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Single sign-on
Why it's wrong here
Single sign-on is a convenience feature that simplifies access management but is not a distinct security layer in defense in depth.
- ✗
Encryption at rest
Why it's wrong here
Encryption at rest is a security control that protects data, but it is not typically considered a separate layer in the classic defense in depth model which focuses on network, host, and application layers.
- ✓
Network firewall
Why this is correct
A network firewall is a classic network layer control that filters traffic between networks, a key component of defense in depth.
- ✓
Anti-malware software
Why this is correct
Anti-malware software is a host-based control that protects endpoints from malicious code, another essential layer in defense in depth.
- ✗
Strong password policy
Why it's wrong here
A strong password policy is a procedural/administrative control, not a technical layer, and does not fit the typical defense in depth model of overlapping technical controls.
Go deeper
Related to this question
Learn chapter
Introduction to Security Principles
Key term
Malware
Malware is any software intentionally designed to cause damage, disrupt operations, steal data, or gain unauthorized access to computer systems.
Key term
Policy
A policy is a set of rules or guidelines that defines how an organization manages, secures, and operates its IT systems and services.
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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.