The correct answer is implementing a vulnerability management program with regular patching, because this directly eliminates the root cause of the compromise: the unpatched vulnerability. A structured vulnerability management program systematically identifies, prioritizes, and applies security patches, closing the known weakness before an attacker can exploit it. On the CISA exam, this question tests your understanding of proactive controls versus detective or reactive measures—a common trap is choosing an intrusion detection system or a firewall, which only detect or limit damage after exploitation occurs. The key distinction is that vulnerability management and patching prevent the initial incident, while other controls address the aftermath. For a memory tip, think “Patch to prevent, detect to defend”—the first step in any security posture is eliminating known vulnerabilities through timely patching.
CISA Protection of Information Assets Practice Question
This CISA practice question tests your understanding of protection of information assets. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A security auditor discovers that a server has been compromised due to an unpatched vulnerability. Which of the following would have most effectively prevented this incident?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Implementing a vulnerability management program with regular patching.
Option B is correct because a vulnerability management program with regular patching directly addresses the root cause of the compromise: the unpatched vulnerability. By systematically identifying, prioritizing, and applying security patches, the organization eliminates the known weakness that the attacker exploited. This proactive measure prevents the initial compromise, whereas other controls only detect or limit the attack after the vulnerability is exploited.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
Enabling firewall rules to limit access.
Why it's wrong here
Firewalls may reduce attack surface but cannot mitigate the specific vulnerability if accessible.
✓
Implementing a vulnerability management program with regular patching.
Why this is correct
Correct. Regular patching addresses root cause by eliminating known vulnerabilities.
Related concept
Read the scenario before looking for a memorised answer.
✗
Installing a host-based intrusion detection system (HIDS).
Why it's wrong here
HIDS can detect but not prevent a compromise if the vulnerability is unpatched.
✗
Using strong passwords on the server.
Why it's wrong here
Strong passwords help prevent unauthorized access but do not address the unpatched vulnerability.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often choose a detective or preventive control (like a firewall or HIDS) that mitigates the attack surface or detects the breach, rather than recognizing that patching is the only option that eliminates the root cause of the vulnerability itself.
Detailed technical explanation
How to think about this question
A vulnerability management program typically integrates with a patch management system that uses tools like WSUS, SCCM, or Ansible to deploy patches across the enterprise. The Common Vulnerability Scoring System (CVSS) is often used to prioritize patches based on exploitability and impact. In a real-world scenario, the absence of patching for a critical remote code execution vulnerability (e.g., CVE-2021-44228 in Log4j) allowed attackers to compromise servers even with firewalls and strong passwords in place, because the vulnerability was in a widely used library that processed untrusted input.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A small business has 20 workstations on the 192.168.1.0/24 network and one public IP from its ISP. The router uses PAT (NAT overload) so all 20 devices share one public address using different source ports. NAT questions test whether you understand the four address terms and which direction each translation applies.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Protection of Information Assets — This question tests Protection of Information Assets — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Implementing a vulnerability management program with regular patching. — Option B is correct because a vulnerability management program with regular patching directly addresses the root cause of the compromise: the unpatched vulnerability. By systematically identifying, prioritizing, and applying security patches, the organization eliminates the known weakness that the attacker exploited. This proactive measure prevents the initial compromise, whereas other controls only detect or limit the attack after the vulnerability is exploited.
What should I do if I get this CISA question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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