- A
Delay the patch until the next maintenance window but document the risk acceptance with CEO sign-off.
Why wrong: Delaying leaves high risk exposed and does not address PCI DSS requirements.
- B
Accept the risk and schedule the patch during the next maintenance window as originally planned.
Why wrong: Accepting the risk disregards PCI DSS non-compliance fines.
- C
Apply the patch immediately during peak hours, accepting the revenue loss from downtime.
Why wrong: Immediate patching during peak hours causes significant revenue loss; a less disruptive approach is better.
- D
Implement a compensating control (e.g., web application firewall) and schedule the patch during off-peak hours within 48 hours.
Compensating controls reduce risk while allowing a timely patch without peak-hour disruption.
CRISC Risk Response and Mitigation Practice Question
This CRISC practice question tests your understanding of risk response and mitigation. 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 small e-commerce company has identified a high-risk vulnerability in its payment processing system that could expose customer credit card data. The IT team recommends immediately patching the system, but the patch requires a 4-hour downtime during peak sales hours. The risk manager proposes accepting the risk until the next scheduled maintenance window in two weeks. The CEO is concerned about potential fines from PCI DSS non-compliance. What is the BEST course of action?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue:
"best"Why it matters: Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
Clue:
"immediately / without restart"Why it matters: Time or reboot constraint — the correct answer must take effect right away without requiring a reboot or reload.
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 a compensating control (e.g., web application firewall) and schedule the patch during off-peak hours within 48 hours.
Option C is correct because it balances the need to address PCI DSS compliance with business continuity. Implementing compensating controls reduces risk while avoiding peak-hour downtime. Option A is wrong because accepting risk ignores compliance obligations. Option B is wrong because it prioritizes compliance over business impact with excessive downtime. Option D is wrong because postponing until the next window leaves high risk unaddressed.
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.
- ✗
Delay the patch until the next maintenance window but document the risk acceptance with CEO sign-off.
Why it's wrong here
Delaying leaves high risk exposed and does not address PCI DSS requirements.
- ✗
Accept the risk and schedule the patch during the next maintenance window as originally planned.
Why it's wrong here
Accepting the risk disregards PCI DSS non-compliance fines.
- ✗
Apply the patch immediately during peak hours, accepting the revenue loss from downtime.
Why it's wrong here
Immediate patching during peak hours causes significant revenue loss; a less disruptive approach is better.
- ✓
Implement a compensating control (e.g., web application firewall) and schedule the patch during off-peak hours within 48 hours.
Why this is correct
Compensating controls reduce risk while allowing a timely patch without peak-hour disruption.
Clue confirmation
The clue words "best", "immediately / without restart" in the question point toward this answer.
Related concept
Static NAT maps one inside address to one outside address.
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 CRISC NAT questions on configuration and troubleshooting.
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Risk Response and Mitigation — study guide chapter
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FAQ
Questions learners often ask
What does this CRISC question test?
Risk Response and Mitigation — This question tests Risk Response and Mitigation — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: Implement a compensating control (e.g., web application firewall) and schedule the patch during off-peak hours within 48 hours. — Option C is correct because it balances the need to address PCI DSS compliance with business continuity. Implementing compensating controls reduces risk while avoiding peak-hour downtime. Option A is wrong because accepting risk ignores compliance obligations. Option B is wrong because it prioritizes compliance over business impact with excessive downtime. Option D is wrong because postponing until the next window leaves high risk unaddressed.
What should I do if I get this CRISC 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 CRISC NAT questions on configuration and troubleshooting.
Are there clue words in this question I should notice?
Yes — watch for: "best", "immediately / without restart". Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
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 CRISC 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 CRISC exam.
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