Quick Answer
The answer is that the bucket policy denies HTTP requests via the aws:SecureTransport condition. This condition explicitly requires that all requests to the S3 bucket use TLS/HTTPS; when an application sends an HTTP request, the condition evaluates to false, and the policy’s Deny effect blocks the request. On the AWS Certified Developer Associate DVA-C02 exam, this scenario tests your understanding of how S3 bucket policies enforce encryption in transit, often appearing as a trick where the Management Console works (because it uses HTTPS by default) but a custom application fails. A common trap is assuming the issue is with permissions or bucket ACLs rather than the transport protocol. To remember: if you see “require TLS” or “aws:SecureTransport” in a policy, think “HTTPS only—HTTP gets blocked.” A handy mnemonic is “SecureTransport says ‘S’ for secure, so HTTP without the ‘S’ is denied.”
This DVA-C02 practice question tests your understanding of security. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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 developer is using an S3 bucket to store sensitive files. The bucket policy includes a condition that requires TLS for all requests. A user reports that they can access the bucket via the AWS Management Console but not via an application using HTTP. What is the likely issue?
The application is using an expired IAM access key.
Why wrong: No indication of expiration.
The bucket policy denies HTTP requests via aws:SecureTransport condition.
Console uses HTTPS, application uses HTTP.
The S3 bucket is in a different region.
Why wrong: Region mismatch would affect both.
The application is not signing requests with Signature Version 4.
Why wrong: TLS condition is separate from signing.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
The bucket policy denies HTTP requests via aws:SecureTransport condition.
The condition aws:SecureTransport requires HTTPS; the application uses HTTP, which violates the policy.
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
For each option: why learners choose it and why it is or isn't the right answer here.
The application is using an expired IAM access key.
Why it's wrong here
No indication of expiration.
The bucket policy denies HTTP requests via aws:SecureTransport condition.
The S3 bucket is in a different region.
Why it's wrong here
Region mismatch would affect both.
The application is not signing requests with Signature Version 4.
Why it's wrong here
TLS condition is separate from signing.
Common exam traps
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
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.
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
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
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 DVA-C02 NAT questions on configuration and troubleshooting.
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FAQ
Security — This question tests Security — Static NAT maps one inside address to one outside address..
The correct answer is: The bucket policy denies HTTP requests via aws:SecureTransport condition. — The condition aws:SecureTransport requires HTTPS; the application uses HTTP, which violates the policy.
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 DVA-C02 NAT questions on configuration and troubleshooting.
Static NAT maps one inside address to one outside address.
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Last reviewed: Jun 20, 2026
This DVA-C02 practice question is part of Courseiva's free Amazon Web Services 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 DVA-C02 exam.
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