- A
{"Effect":"Deny","Principal":"*","Action":"s3:*","Resource":"arn:aws:s3:::bucketname/*","Condition":{"Bool":{"aws:SecureTransport":"true"}}}
Why wrong: This denies requests when SecureTransport is true, which blocks HTTPS requests. It should be false.
- B
{"Effect":"Allow","Principal":"*","Action":"s3:*","Resource":"arn:aws:s3:::bucketname/*","Condition":{"Bool":{"aws:SecureTransport":"true"}}}
Why wrong: This allows only HTTPS requests but does not explicitly deny non-HTTPS, which may still be allowed by other policies.
- C
{"Effect":"Deny","Principal":"*","Action":"s3:*","Resource":"arn:aws:s3:::bucketname/*","Condition":{"Bool":{"aws:SecureTransport":"true"}}}
Why wrong: This denies HTTPS requests, which is the opposite of what is needed.
- D
{"Effect":"Deny","Principal":"*","Action":"s3:*","Resource":"arn:aws:s3:::bucketname/*","Condition":{"Bool":{"aws:SecureTransport":"false"}}}
This denies requests when SecureTransport is false, effectively requiring HTTPS.
Quick Answer
The answer is to add a bucket policy with a Deny effect using the Bool condition `aws:SecureTransport: false`. This configuration explicitly blocks any request that does not use HTTPS, because the condition evaluates to true when SecureTransport is false, triggering the Deny on all S3 actions for the specified bucket resources. On the AWS Certified Advanced Networking Specialty ANS-C01 exam, this scenario tests your understanding of how to enforce encryption in transit using S3 bucket policies, a common requirement for compliance audits like PCI-DSS or financial regulations. A frequent trap is confusing the Bool operator: using `"aws:SecureTransport":"true"` with a Deny would incorrectly block HTTPS traffic, while using it with an Allow would permit HTTPS but fail to explicitly deny non-HTTPS requests, leaving a gap. Remember the memory tip: “Deny false to force secure” — if SecureTransport is false, deny the request to enforce HTTPS.
ANS-C01 Network Security, Compliance and Governance Practice Question
This ANS-C01 practice question tests your understanding of network security, compliance and governance. 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.
A financial services company is required to encrypt all data at rest and in transit. They have an Amazon S3 bucket with server-side encryption enabled (SSE-S3) and are using HTTPS for all API calls. During an audit, the auditor points out that the bucket policy does not explicitly deny requests that do not use HTTPS. Which of the following should the company add to the bucket policy to enforce HTTPS?
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
{"Effect":"Deny","Principal":"*","Action":"s3:*","Resource":"arn:aws:s3:::bucketname/*","Condition":{"Bool":{"aws:SecureTransport":"false"}}}
Option B is correct because the condition block with aws:SecureTransport false and a Deny effect ensures that any request not using HTTPS is denied. Option A is wrong because using Bool with true would allow only HTTPS, but the condition should be false to deny non-HTTPS. Option C is wrong because it allows HTTPS requests but does not deny non-HTTPS. Option D is wrong because it denies when SecureTransport is true, which would block HTTPS requests.
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.
- ✗
{"Effect":"Deny","Principal":"*","Action":"s3:*","Resource":"arn:aws:s3:::bucketname/*","Condition":{"Bool":{"aws:SecureTransport":"true"}}}
Why it's wrong here
This denies requests when SecureTransport is true, which blocks HTTPS requests. It should be false.
- ✗
{"Effect":"Allow","Principal":"*","Action":"s3:*","Resource":"arn:aws:s3:::bucketname/*","Condition":{"Bool":{"aws:SecureTransport":"true"}}}
Why it's wrong here
This allows only HTTPS requests but does not explicitly deny non-HTTPS, which may still be allowed by other policies.
- ✗
{"Effect":"Deny","Principal":"*","Action":"s3:*","Resource":"arn:aws:s3:::bucketname/*","Condition":{"Bool":{"aws:SecureTransport":"true"}}}
Why it's wrong here
This denies HTTPS requests, which is the opposite of what is needed.
- ✓
{"Effect":"Deny","Principal":"*","Action":"s3:*","Resource":"arn:aws:s3:::bucketname/*","Condition":{"Bool":{"aws:SecureTransport":"false"}}}
Why this is correct
This denies requests when SecureTransport is false, effectively requiring HTTPS.
Related concept
Standard ACLs match source addresses.
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 ANS-C01 ACL questions on filtering logic and placement.
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FAQ
Questions learners often ask
What does this ANS-C01 question test?
Network Security, Compliance and Governance — This question tests Network Security, Compliance and Governance — Standard ACLs match source addresses..
What is the correct answer to this question?
The correct answer is: {"Effect":"Deny","Principal":"*","Action":"s3:*","Resource":"arn:aws:s3:::bucketname/*","Condition":{"Bool":{"aws:SecureTransport":"false"}}} — Option B is correct because the condition block with aws:SecureTransport false and a Deny effect ensures that any request not using HTTPS is denied. Option A is wrong because using Bool with true would allow only HTTPS, but the condition should be false to deny non-HTTPS. Option C is wrong because it allows HTTPS requests but does not deny non-HTTPS. Option D is wrong because it denies when SecureTransport is true, which would block HTTPS requests.
What should I do if I get this ANS-C01 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 ANS-C01 ACL questions on filtering logic and placement.
What is the key concept behind this question?
Standard ACLs match source addresses.
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Last reviewed: Jun 20, 2026
This ANS-C01 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 ANS-C01 exam.
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