SCS-C02 Data Protection Practice Question
A company is using Amazon S3 to store confidential documents. They want to ensure that all data is encrypted in transit between the S3 bucket and their on-premises application. Which of the following should be enforced?
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 access unless 'aws:SecureTransport' is true.
The 'aws:SecureTransport' condition in a bucket policy enforces HTTPS for all requests, ensuring encryption in transit. Option B is incorrect because CloudFront does not enforce HTTPS between CloudFront and the S3 origin by default; it can be configured but is not enforced solely by this option. Option C is incorrect because a VPC endpoint for S3 uses HTTPS by default, but does not enforce it; bucket policies are still needed. Option D is incorrect because SSE-S3 encrypts data at rest, not in transit.
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 access unless 'aws:SecureTransport' is true.
Why this is correct
This enforces HTTPS for all requests to the bucket.
- ✗
Use Amazon CloudFront with a custom origin pointing to the S3 bucket.
Why it's wrong here
CloudFront can use HTTPS, but does not enforce it from the origin.
- ✗
Use a VPC endpoint for S3.
Why it's wrong here
VPC endpoints use AWS network, but do not enforce HTTPS.
- ✗
Enable default encryption (SSE-S3) on the bucket.
Why it's wrong here
SSE encrypts at rest, not in transit.
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 |
Go deeper
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This SCS-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 SCS-C02 exam.