The correct answer is to add an S3 bucket policy that denies access unless `aws:SecureTransport` is true. This works because the `aws:SecureTransport` condition key enforces that all requests to the bucket must use HTTPS, which inherently requires TLS 1.2 or higher for encryption in transit. AWS Glue, by default, uses HTTPS when communicating with S3, but without this bucket policy, a misconfiguration or a downgrade attack could allow unencrypted HTTP traffic. On the AWS Certified Data Engineer Associate DEA-C01 exam, this question tests your understanding of how to enforce encryption in transit at the service level versus the network level—a common trap is confusing VPC endpoints (which enforce private connectivity but not TLS version) or KMS (which handles at-rest encryption). Remember the memory tip: "SecureTransport secures the transport"—if you need to enforce TLS for Glue to S3 traffic, the bucket policy is your enforcement point, not the Glue job configuration.
DEA-C01 Data Security and Governance Practice Question
This DEA-C01 practice question tests your understanding of data security and governance. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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 company uses AWS Glue to process sensitive data. The security team requires that all data in transit between Glue and Amazon S3 be encrypted using TLS 1.2 or higher. Which configuration ensures this requirement is met?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Add a bucket policy that denies access unless aws:SecureTransport is true
S3 bucket policies can enforce aws:SecureTransport to require HTTPS. Glue by default uses HTTPS when accessing S3, but to enforce it, the bucket policy must deny requests without SecureTransport. Option A is wrong because VPC endpoints enforce private connectivity but not necessarily TLS version. Option B is wrong because S3 Block Public Access does not affect encryption in transit. Option D is wrong because KMS is for at-rest encryption. 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.
✗
Configure a VPC endpoint for S3 and enable private DNS
Why it's wrong here
This ensures traffic stays within AWS network but does not enforce TLS 1.2.
✗
Enable S3 Block Public Access at the bucket level
Why it's wrong here
This controls public access, not encryption in transit.
✓
Add a bucket policy that denies access unless aws:SecureTransport is true
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 DEA-C01 ACL questions on filtering logic and placement.
Data Security and Governance — This question tests Data Security and Governance — Standard ACLs match source addresses..
What is the correct answer to this question?
The correct answer is: Add a bucket policy that denies access unless aws:SecureTransport is true — S3 bucket policies can enforce aws:SecureTransport to require HTTPS. Glue by default uses HTTPS when accessing S3, but to enforce it, the bucket policy must deny requests without SecureTransport. Option A is wrong because VPC endpoints enforce private connectivity but not necessarily TLS version. Option B is wrong because S3 Block Public Access does not affect encryption in transit. Option D is wrong because KMS is for at-rest encryption. Option C is correct.
What should I do if I get this DEA-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 DEA-C01 ACL questions on filtering logic and placement.
What is the key concept behind this question?
Standard ACLs match source addresses.
About these practice questions
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Variation 1. A company uses AWS Glue to process data. The security team requires that all data in transit between AWS Glue and Amazon S3 be encrypted using TLS. Which configuration should be used?
easy
✓ A.Enable S3 server-side encryption and use HTTPS endpoints
B.Configure a bucket policy to require aws:SecureTransport
C.Enable default encryption on the S3 bucket using SSE-KMS
D.Use an S3 VPC endpoint
Why A: Option A is correct because AWS Glue uses TLS for data in transit by default. Option B is wrong because S3 default encryption is for at-rest. Option C is wrong because VPC endpoints use AWS PrivateLink but don't enforce encryption. Option D is wrong because it's not required for TLS.
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This DEA-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 DEA-C01 exam.
Question Discussion
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