The correct answer is that only requests from the IP range 192.0.2.0/24 are allowed. This is because, in AWS IAM policy evaluation logic, an explicit Deny always overrides any Allow, regardless of the order in which the statements appear. The bucket policy includes an Allow statement granting public read access, but the subsequent Deny statement explicitly blocks all S3 actions when the source IP is not within the specified range, effectively narrowing the allowed access to only that CIDR block. On the AWS Certified DevOps Engineer Professional DOP-C02 exam, this scenario tests your understanding of the policy evaluation hierarchy, particularly how Deny statements act as an override to prevent unintended public access. A common trap is assuming the Allow statement alone grants open access, but the Deny acts as a conditional filter. Remember the mnemonic: "Deny always denies, even if Allow says yes."
DOP-C02 Security and Compliance Practice Question
This DOP-C02 practice question tests your understanding of security 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.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Only requests from IP range 192.0.2.0/24 are allowed
The Allow statement grants public read access. The Deny statement denies all S3 actions when the source IP is not in 192.0.2.0/24. Since a Deny overrides an Allow, only requests from within that IP range are allowed. Option C is correct.
Key principle: ACLs process entries top to bottom and stop at the first match. Entry order and interface direction matter as much as the permit or deny statement.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
All anonymous users can read objects
Why it's wrong here
Deny overrides Allow, so only IPs in the range are allowed.
✗
All requests are denied
Why it's wrong here
Requests from 192.0.2.0/24 are allowed.
✓
Only requests from IP range 192.0.2.0/24 are allowed
Why this is correct
Deny with condition allows only that IP range.
Related concept
Standard ACLs match source addresses.
✗
Only authenticated users can read objects
Why it's wrong here
Principal is *, so unauthenticated users are allowed if from the IP range.
Common exam traps
Common exam trap: ACLs stop at the first match
ACLs are processed top to bottom. The first matching entry wins, and an implicit deny usually exists at the end.
Detailed technical explanation
How to think about this question
ACL questions test precision: source, destination, protocol, port and direction. A generally correct ACL can still fail if it is applied on the wrong interface or in the wrong direction.
KKey Concepts to Remember
Standard ACLs match source addresses.
Extended ACLs can match source, destination, protocol and ports.
The first matching ACL entry is used.
There is usually an implicit deny at the end.
TExam Day Tips
→Check inbound versus outbound direction.
→Read the ACL from top to bottom.
→Look for a broader permit or deny above the intended line.
Key takeaway
ACLs process entries top to bottom and stop at the first match. Entry order and interface direction matter as much as the permit or deny statement.
Real-world example
How this comes up in practice
A media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
What to study next
Got this wrong? Here's your next step.
Review ACL processing order, placement rules (standard near destination, extended near source), and inbound vs outbound direction. Study wildcard masks and implicit deny. Then practise related DOP-C02 ACL questions on filtering logic and placement.
Security and Compliance — This question tests Security and Compliance — Standard ACLs match source addresses..
What is the correct answer to this question?
The correct answer is: Only requests from IP range 192.0.2.0/24 are allowed — The Allow statement grants public read access. The Deny statement denies all S3 actions when the source IP is not in 192.0.2.0/24. Since a Deny overrides an Allow, only requests from within that IP range are allowed. Option C is correct.
What should I do if I get this DOP-C02 question wrong?
Review ACL processing order, placement rules (standard near destination, extended near source), and inbound vs outbound direction. Study wildcard masks and implicit deny. Then practise related DOP-C02 ACL questions on filtering logic and placement.
What is the key concept behind this question?
Standard ACLs match source addresses.
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Question Discussion
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