CAS-004 Security Operations Practice Question
An organization discovers a critical vulnerability in a legacy application that cannot be patched due to vendor end-of-life. Which of the following is the BEST compensating control to reduce risk?
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
✓
Implement network segmentation to isolate the application
Network segmentation isolates the vulnerable system, reducing the attack surface and limiting potential damage.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Increase logging and monitoring
Why it's wrong here
Monitoring does not prevent exploitation.
- ✗
Apply a virtual patch using an intrusion prevention system (IPS)
Why it's wrong here
Virtual patching can be effective but may not be feasible if the vulnerability is not signature-based.
- ✓
Implement network segmentation to isolate the application
Why this is correct
Segmentation limits exposure and protects the rest of the network.
- ✗
Decommission the application immediately
Why it's wrong here
Decommissioning may not be possible if the application is critical.
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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.