CAS-004 Security Architecture Practice Question
An organization is architecting a hybrid cloud environment with AWS and on-premises resources. Which THREE considerations are essential for meeting data residency requirements? (Choose three.)
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
✓
Selecting the correct AWS region for data storage
Data residency requires control over data location. AWS region selection determines physical storage location. Data classification policies enforce where data can reside. Encryption keys stored in a specific region ensure data remains under jurisdictional control.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Selecting the correct AWS region for data storage
Why this is correct
Region selection ensures data stays within specific geographic boundaries.
- ✗
Using only on-premises storage for all data
Why it's wrong here
This may not be feasible and does not address hybrid architecture.
- ✓
Storing encryption keys in the same region as the data
Why this is correct
Keys stored in-region ensure compliance with laws requiring data to remain under local jurisdiction.
- ✓
Implementing data classification policies
Why this is correct
Policies define which data can be stored where.
- ✗
Using a global AWS account without region constraints
Why it's wrong here
Global accounts may span multiple regions, complicating residency.
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
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