This CCSP practice question tests your understanding of legal, risk and compliance. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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.
Refer to the exhibit. A security engineer discovers that the S3 bucket policy allows public read access from the entire corporate network (10.0.0.0/16). However, the company wants to restrict access only to the security team's subnet (10.0.1.0/24). What modification should be made to the policy?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Change the Condition value to "aws:SourceIp": "10.0.1.0/24".
Option D is correct because modifying the Condition value to "aws:SourceIp": "10.0.1.0/24" directly restricts the S3 bucket policy to allow read access only from the security team's subnet. The original policy uses the aws:SourceIp condition key with the broader 10.0.0.0/16 range, so narrowing it to 10.0.1.0/24 precisely enforces the required access control. This approach leverages AWS IAM policy evaluation logic where an explicit Allow with a condition must be satisfied for access to be granted.
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.
✗
Add a Deny statement for the 10.0.0.0/16 range.
Why it's wrong here
This would deny access to the entire corporate network, including the security subnet.
✗
Add a Deny statement for IP addresses outside 10.0.1.0/24.
Why it's wrong here
Deny statements can override Allow, but it's simpler to modify the Allow condition.
✗
Remove the Condition element to allow access from any IP.
Why it's wrong here
This would open access to all IPs, violating the requirement.
✓
Change the Condition value to "aws:SourceIp": "10.0.1.0/24".
Why this is correct
This narrows the allowed IP range to the security subnet only.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
ISC2 often tests the misconception that adding a Deny statement for the broader range (Option A) is the correct way to narrow access, but candidates fail to realize that Deny would block the intended subnet as well, whereas modifying the Condition value is the proper method to restrict an existing Allow.
Detailed technical explanation
How to think about this question
Under the hood, AWS S3 bucket policies are evaluated using IAM policy logic where explicit Deny always overrides Allow, and conditions must be met for the Allow to take effect. The aws:SourceIp condition key uses the source IP address of the request, and when specified in a bucket policy, it restricts access to requests originating from that IP range. In a real-world scenario, if the corporate network uses NAT or VPN endpoints, the source IP seen by AWS might differ from the internal subnet, so the security team must ensure that the IP range in the condition matches the public-facing IP addresses of the security team's subnet after any network address translation.
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 developer is choosing between AES-256 (symmetric) and RSA-2048 (asymmetric) for encrypting a large file that will be sent to a partner. Symmetric encryption is fast but requires key exchange; asymmetric is slower but solves the key distribution problem. A hybrid approach — encrypt the file with AES, encrypt the AES key with RSA — is standard. Questions like this test whether you understand when each approach 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.
Legal, Risk and Compliance — This question tests Legal, Risk and Compliance — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Change the Condition value to "aws:SourceIp": "10.0.1.0/24". — Option D is correct because modifying the Condition value to "aws:SourceIp": "10.0.1.0/24" directly restricts the S3 bucket policy to allow read access only from the security team's subnet. The original policy uses the aws:SourceIp condition key with the broader 10.0.0.0/16 range, so narrowing it to 10.0.1.0/24 precisely enforces the required access control. This approach leverages AWS IAM policy evaluation logic where an explicit Allow with a condition must be satisfied for access to be granted.
What should I do if I get this CCSP 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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