- A
Conduct a forensic analysis of the server to determine if a breach has occurred
Why wrong: Incorrect: While forensic analysis might be needed, the immediate next step is to inform management to contain the risk.
- B
Wait for the decommissioning timeline and monitor the server logs for any signs of breach
Why wrong: Incorrect: This passive approach ignores the ongoing risk of data exposure.
- C
Issue an urgent audit report to senior management highlighting the risk and recommending immediate isolation or remediation
Correct: Auditors must escalate critical findings promptly to management for action.
- D
Propose a compensating control, such as requiring VPN access to the server
Why wrong: Incorrect: Proposing specific controls without management's awareness and direction is beyond the auditor's role at this stage.
Quick Answer
The correct next step is to issue an urgent audit report to senior management highlighting the risk and recommending immediate isolation or remediation. This is because the post-merger audit critical vulnerability—an internet-exposed HR system on an unsupported OS with no logging—creates an unacceptably high risk of a data breach, and the auditor’s primary duty is to escalate material findings without delay. On the Certified Information Systems Auditor CISA exam, this scenario tests your understanding of the audit response hierarchy: when a critical vulnerability is discovered, immediate reporting to management overrides waiting for decommissioning plans or assuming no compromise. A common trap is choosing to gather more evidence or wait for the integration timeline, but the core principle is that risk severity dictates urgency, not the IT manager’s assurances. Memory tip: think “CRITICAL = Communicate Risk Immediately To All Levels.”
CISA Information System Auditing Process Practice Question
This CISA practice question tests your understanding of information system auditing process. 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.
You are the lead IT auditor for a multinational corporation that recently completed a merger with another company. During the post-merger integration audit, you discover that the acquired company's legacy HR system contains sensitive personal data of 20,000 employees and has been directly accessible from the internet for the last 18 months. The system runs on an unsupported operating system (Windows Server 2008) and uses a custom-built application with no logging enabled. The acquired company's IT manager argues that the server is isolated behind a firewall and has never been compromised. However, your review of firewall logs shows numerous connection attempts from unknown IP addresses. The integration team plans to decommission this system in three months. You need to determine the appropriate audit response. Which of the following should you do NEXT?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue:
"never"Why it matters: Absolute qualifier. True only if the statement has zero exceptions — be cautious of options that seem obvious but break down in edge cases.
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
Issue an urgent audit report to senior management highlighting the risk and recommending immediate isolation or remediation
Option B is correct: Immediately reporting the critical vulnerability to management is the first step because the risk of data exposure is severe and requires urgent attention. Option A delays action, C assumes a compromise that hasn't been confirmed, and D is premature without management directive.
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Conduct a forensic analysis of the server to determine if a breach has occurred
Why it's wrong here
Incorrect: While forensic analysis might be needed, the immediate next step is to inform management to contain the risk.
- ✗
Wait for the decommissioning timeline and monitor the server logs for any signs of breach
Why it's wrong here
Incorrect: This passive approach ignores the ongoing risk of data exposure.
- ✓
Issue an urgent audit report to senior management highlighting the risk and recommending immediate isolation or remediation
Why this is correct
Correct: Auditors must escalate critical findings promptly to management for action.
Clue confirmation
The clue word "never" in the question point toward this answer.
Related concept
Static NAT maps one inside address to one outside address.
- ✗
Propose a compensating control, such as requiring VPN access to the server
Why it's wrong here
Incorrect: Proposing specific controls without management's awareness and direction is beyond the auditor's role at this stage.
Common exam traps
Common exam trap: NAT rules depend on direction and matching traffic
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Detailed technical explanation
How to think about this question
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
KKey Concepts to Remember
- Static NAT maps one inside address to one outside address.
- PAT allows many inside hosts to share one public address using ports.
- Inside local and inside global describe the private and translated addresses.
- NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
- Identify inside and outside interfaces first.
- Check whether the scenario needs static NAT, dynamic NAT or PAT.
- Do not confuse NAT matching ACLs with normal packet-filtering intent.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
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.
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related CISA NAT questions on configuration and troubleshooting.
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FAQ
Questions learners often ask
What does this CISA question test?
Information System Auditing Process — This question tests Information System Auditing Process — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: Issue an urgent audit report to senior management highlighting the risk and recommending immediate isolation or remediation — Option B is correct: Immediately reporting the critical vulnerability to management is the first step because the risk of data exposure is severe and requires urgent attention. Option A delays action, C assumes a compromise that hasn't been confirmed, and D is premature without management directive.
What should I do if I get this CISA question wrong?
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related CISA NAT questions on configuration and troubleshooting.
Are there clue words in this question I should notice?
Yes — watch for: "never". Absolute qualifier. True only if the statement has zero exceptions — be cautious of options that seem obvious but break down in edge cases.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
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Last reviewed: Jun 24, 2026
This CISA 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 CISA exam.
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