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CAS-004 Practice Question: Wants to reduce the attack surface of its web…

An organization wants to reduce the attack surface of its web servers by ensuring only necessary modules are enabled. Which practice directly supports this goal?

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

✓

Application whitelisting and module disablement

Application whitelisting and module disablement. This practice directly reduces the attack surface by ensuring only authorized applications and necessary modules are enabled, eliminating unnecessary services that could be exploited. Option A (Patch management) addresses vulnerabilities in existing software but does not remove unused modules. Option C (Regular backups) focuses on data recovery, not attack surface reduction. Option D (Multi-factor authentication) strengthens access control but does not limit enabled modules or applications.

Answer analysis

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

  • ✗

    Patch management

    Why it's wrong here

    Patching fixes vulnerabilities but does not reduce the number of enabled modules.

  • ✓

    Application whitelisting and module disablement

    Why this is correct

    Whitelisting and disabling unnecessary modules reduce attack surface.

  • ✗

    Regular backups

    Why it's wrong here

    Backups help with recovery, not attack surface reduction.

  • ✗

    Multi-factor authentication

    Why it's wrong here

    MFA improves authentication security but does not reduce the attack surface of the server.

About these practice questions

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JA

Written by Johnson Ajibi, MSc IT Security

Senior Network & Security Engineer · founder of Courseiva

This CAS-005 practice question is part of Courseiva's free CompTIA 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 CAS-005 exam.