The answer is to use an S3 Gateway Endpoint and ensure the Glue job uses HTTPS. This configuration guarantees TLS encryption for data in transit because traffic between AWS Glue and S3 through a Gateway Endpoint is automatically encrypted at the transport layer when using the HTTPS protocol, which is the default for S3 API calls. On the AWS Certified Data Engineer Associate DEA-C01 exam, this question tests your understanding that encryption in transit is a function of the protocol (HTTPS/TLS), not of KMS keys or endpoint type—a common trap is assuming an Interface Endpoint is required for encryption, but Gateway Endpoints handle TLS natively. Remember the key distinction: Gateway Endpoints provide free, private connectivity with automatic TLS over HTTPS, while Interface Endpoints add cost without improving transit encryption. A helpful memory tip: “Gateway gets you TLS gratis—no extra interfaces needed.”
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 has an AWS Glue ETL job that reads data from an S3 bucket, transforms it, and writes to another S3 bucket. The security team requires that data in transit between the Glue job and S3 be encrypted using TLS. The Glue job runs in a VPC with a VPC endpoint for S3. Which configuration ensures TLS encryption for all data transfer?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use an S3 Gateway Endpoint and ensure the Glue job uses HTTPS.
For S3 VPC endpoints, traffic is encrypted via TLS by default when using Gateway Endpoints. Option C is correct. Option A is wrong because HTTPS is the default protocol for S3 API calls. Option B is wrong because encryption in transit is independent of KMS. Option D is wrong because interface endpoints also support TLS, but Gateway Endpoints are sufficient.
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
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
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Use an S3 Gateway Endpoint and ensure the Glue job uses HTTP instead of HTTPS.
Common exam trap: NAT rules depend on direction and matching traffic
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
How to think about this question
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.
KKey Concepts to Remember
Static NAT maps one inside address to one outside address.
PAT allows many inside hosts to share one public address using ports.
Inside local and inside global describe the private and translated addresses.
NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
→Identify inside and outside interfaces first.
→Check whether the scenario needs static NAT, dynamic NAT or PAT.
→Do not confuse NAT matching ACLs with normal packet-filtering intent.
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
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 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 DEA-C01 NAT questions on configuration and troubleshooting.
Data Security and Governance — This question tests Data Security and Governance — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: Use an S3 Gateway Endpoint and ensure the Glue job uses HTTPS. — For S3 VPC endpoints, traffic is encrypted via TLS by default when using Gateway Endpoints. Option C is correct. Option A is wrong because HTTPS is the default protocol for S3 API calls. Option B is wrong because encryption in transit is independent of KMS. Option D is wrong because interface endpoints also support TLS, but Gateway Endpoints are sufficient.
What should I do if I get this DEA-C01 question wrong?
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 DEA-C01 NAT questions on configuration and troubleshooting.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
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Question Discussion
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