The correct answer is that this S3 bucket policy denies access to the bucket if the request is not sent over HTTPS. The policy works by using the `aws:SecureTransport` condition key; when this key is set to `false`, it means the request was made over HTTP rather than HTTPS, and the `Deny` effect blocks all S3 actions under those circumstances. On the AWS Certified DevOps Engineer Professional DOP-C02 exam, this scenario tests your understanding of how to enforce encryption in transit using bucket policies, a common security requirement for compliance frameworks like PCI DSS or HIPAA. A frequent trap is confusing `aws:SecureTransport` with server-side encryption settings—remember, this condition only checks the transport layer, not data at rest. For a quick memory tip, think "SecureTransport = HTTPS only; if false, access is denied."
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
✓
It denies access to the bucket if the request is not sent over HTTPS
The policy denies all S3 actions when aws:SecureTransport is false, i.e., when the request is not using HTTPS. This effectively enforces HTTPS for all access to the bucket. Option A is correct. It does not allow anonymous access (B). It does not deny all access (C). It does not allow only specific IPs (D).
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.
✗
It allows anonymous access to the bucket over HTTPS
Why it's wrong here
The policy only denies; it does not grant any explicit allow.
✗
It denies all access to the bucket regardless of protocol
Why it's wrong here
Only denies when SecureTransport is false; HTTPS requests are allowed.
✓
It denies access to the bucket if the request is not sent over HTTPS
Why this is correct
The Deny effect with condition aws:SecureTransport false blocks non-HTTPS requests.
Related concept
Standard ACLs match source addresses.
✗
It allows access only from specific IP addresses
Why it's wrong here
No IP condition is present.
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: It denies access to the bucket if the request is not sent over HTTPS — The policy denies all S3 actions when aws:SecureTransport is false, i.e., when the request is not using HTTPS. This effectively enforces HTTPS for all access to the bucket. Option A is correct. It does not allow anonymous access (B). It does not deny all access (C). It does not allow only specific IPs (D).
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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