- A
Assign RBAC roles for data access
Why wrong: RBAC controls authorization, not encryption.
- B
Configure storage firewall rules
Why wrong: Firewall restricts access, but does not encrypt data at rest.
- C
Use customer-managed keys in Azure Key Vault
Customer-managed keys provide additional control over encryption.
- D
Use Azure Storage Service Encryption (SSE)
SSE encrypts data at rest automatically.
- E
Enable TLS 1.2 for all connections
Why wrong: TLS secures data in transit, not at rest.
Question 406 of 851
DP-203 Design and implement data security Practice Question
This DP-203 practice question tests your understanding of design and implement data security. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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.
Which TWO of the following are valid methods to secure data at rest in Azure Data Lake Storage Gen2?
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 customer-managed keys in Azure Key Vault
Both options C and D are correct methods to secure data at rest. Option C, using customer-managed keys (CMK) in Azure Key Vault, allows you to control and rotate encryption keys for Azure Storage Service Encryption (SSE), adding an extra layer of security. Option D, Azure Storage Service Encryption (SSE), automatically encrypts data at rest using Microsoft-managed keys. Both ensure data is encrypted at rest, while RBAC (A), firewall rules (B), and TLS (E) address access control or transport security, not at-rest encryption.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Assign RBAC roles for data access
Why it's wrong here
RBAC controls authorization, not encryption.
- ✗
Configure storage firewall rules
- ✓
Use customer-managed keys in Azure Key Vault
Why this is correct
Customer-managed keys provide additional control over encryption.
Related concept
Read the scenario before looking for a memorised answer.
- ✓
Use Azure Storage Service Encryption (SSE)
Why this is correct
SSE encrypts data at rest automatically.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Enable TLS 1.2 for all connections
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse access control methods (RBAC, firewalls) or transport security (TLS) with data at rest encryption, mistakenly thinking they secure the stored data itself, when in fact only encryption mechanisms like SSE or CMK protect data at rest.
Detailed technical explanation
How to think about this question
Azure Storage Service Encryption (SSE) is enabled by default for all storage accounts, including Azure Data Lake Storage Gen2, and encrypts data at rest using 256-bit AES encryption. When using customer-managed keys, the encryption key hierarchy involves a key encryption key (KEK) stored in Azure Key Vault that wraps the data encryption key (DEK), allowing for key rotation and revocation without re-encrypting all data. In a real-world scenario, organizations subject to compliance standards like PCI DSS or HIPAA often require customer-managed keys to meet key management and audit requirements.
KKey Concepts to Remember
- Read the scenario before looking for a memorised answer.
- Find the constraint that changes the correct option.
- Eliminate answers that are true in general but not in this case.
TExam Day Tips
- Watch for words such as best, first, most likely and least administrative effort.
- Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
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.
Quick reference
Access Control Model Comparison
| Model | Acronym | Who Controls Access? | Best For |
|---|---|---|---|
| Discretionary Access Control | DAC | Resource owner | Small teams, file shares |
| Mandatory Access Control | MAC | System / security labels | Classified govt / military |
| Role-Based Access Control | RBAC | Administrator (via roles) | Enterprise environments |
| Attribute-Based Access Control | ABAC | Policy engine (user + resource attributes) | Fine-grained, dynamic policies |
| Rule-Based Access Control | RuBAC | System rules / ACLs | Firewall rules, network ACLs |
What to study next
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FAQ
Questions learners often ask
What does this DP-203 question test?
Design and implement data security — This question tests Design and implement data security — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Use customer-managed keys in Azure Key Vault — Both options C and D are correct methods to secure data at rest. Option C, using customer-managed keys (CMK) in Azure Key Vault, allows you to control and rotate encryption keys for Azure Storage Service Encryption (SSE), adding an extra layer of security. Option D, Azure Storage Service Encryption (SSE), automatically encrypts data at rest using Microsoft-managed keys. Both ensure data is encrypted at rest, while RBAC (A), firewall rules (B), and TLS (E) address access control or transport security, not at-rest encryption.
What should I do if I get this DP-203 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 11, 2026
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