DEA-C01 Data Security and Governance Practice Question
A company wants to enforce encryption in transit for data moving between an EC2 instance and an S3 bucket. Which TWO methods can achieve this? (Choose 2)
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
✓
Add a bucket policy that denies requests without the aws:SecureTransport condition.
Options A and D are correct. Option A: Adding a bucket policy with the aws:SecureTransport condition denies any requests that are not using HTTPS, thus enforcing encryption in transit. Option D: By using the HTTPS endpoint for S3 API calls, data is encrypted in transit via TLS. Option B is incorrect because a VPC endpoint for S3 does not automatically enforce encryption; it only keeps traffic within the AWS network. Option C is incorrect because SSE-S3 is for server-side encryption at rest, not in transit. Option E is incorrect because CloudTrail is a logging service and does not enforce encryption.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Add a bucket policy that denies requests without the aws:SecureTransport condition.
Why this is correct
This enforces HTTPS.
- ✗
Use a VPC endpoint for S3.
Why it's wrong here
VPC endpoint does not enforce encryption.
- ✗
Enable default SSE-S3 encryption on the bucket.
Why it's wrong here
SSE-S3 is for at-rest encryption.
- ✓
Use the HTTPS endpoint for S3 API calls.
Why this is correct
HTTPS encrypts data in transit.
- ✗
Enable CloudTrail to monitor for non-encrypted requests.
Why it's wrong here
CloudTrail is for logging, not enforcement.
Quick reference
AWS S3 Storage Class Comparison
| Storage Class | Min Duration | Retrieval | Use Case |
|---|---|---|---|
| S3 Standard | None | Immediate | Frequently accessed data |
| S3 Standard-IA | 30 days | Immediate | Infrequent access, rapid retrieval |
| S3 One Zone-IA | 30 days | Immediate | Non-critical infrequent data |
| S3 Intelligent-Tiering | None | Immediate–hours | Unknown or changing access patterns |
| S3 Glacier Instant | 90 days | Milliseconds | Archive with instant retrieval |
| S3 Glacier Flexible | 90 days | Minutes–hours | Archive, flexible retrieval |
| S3 Glacier Deep Archive | 180 days | Hours | Long-term compliance archive |
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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.