CISM Information Security Programme Practice Question
In the context of defense-in-depth, which control provides protection at the network layer to prevent unauthorized access?
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
✓
Firewalls
Firewalls are a network security control that filter traffic based on rules.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Encryption of data at rest
Why it's wrong here
Data at rest protection is at the data layer.
- ✗
Antivirus software
Why it's wrong here
Antivirus is an endpoint protection measure.
- ✓
Firewalls
Why this is correct
Firewalls enforce network access control.
- ✗
Security awareness training
Why it's wrong here
Training is a human layer, not network.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This CISM practice question is part of Courseiva's free ISACA 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 CISM exam.