DBS-C01 Database Security Practice Question
A company stores sensitive customer data in an Amazon S3 bucket. The data is accessed by an Amazon Redshift cluster using the COPY command. The security team wants to ensure that data is encrypted in transit between S3 and Redshift. Which configuration should be used?
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
✓
Use the 'ENCRYPTED' option with the COPY command and ensure the S3 bucket policy requires HTTPS.
The COPY command supports encryption in transit via HTTPS when using the 'ENCRYPTED' option or using an S3 endpoint that enforces HTTPS. Option A is wrong because S3 supports HTTPS, and specifying 'ENCRYPTED' is needed. Option B is wrong because the COPY command does not use SSH; it uses HTTPS. Option D is wrong because S3 server-side encryption protects 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.
- ✗
Use a VPC endpoint for S3 with a bucket policy that denies HTTP.
Why it's wrong here
VPC endpoints enforce HTTPS but the COPY command must use the 'ENCRYPTED' option to ensure encryption.
- ✗
Use the 'SSH' option in the COPY command to encrypt the transfer.
Why it's wrong here
The COPY command does not support SSH; it uses HTTPS for encrypted transfers.
- ✓
Use the 'ENCRYPTED' option with the COPY command and ensure the S3 bucket policy requires HTTPS.
Why this is correct
The 'ENCRYPTED' option forces the COPY command to use HTTPS encryption in transit.
- ✗
Enable S3 server-side encryption on the bucket.
Why it's wrong here
Server-side encryption protects data 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 DBS-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 DBS-C01 exam.