DP-203 Secure data at rest in ADLS Gen2 Practice Question
Which of the following are valid methods to secure data at rest in Azure Data Lake Storage Gen2? (Choose two.)
⚠ Common exam trap
It's easy for candidates to confuse network security controls (like firewalls or Azure AD authentication) with data-at-rest encryption methods, leading candidates to select options that protect access rather than the stored data itself.
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
✓
Azure Storage Service Encryption (SSE) with Microsoft-managed keys
Azure Storage Service Encryption (SSE) with Microsoft-managed keys encrypts data at rest automatically for Azure Data Lake Storage Gen2 using 256-bit AES encryption. This is enabled by default for all storage accounts, ensuring data written to disk is encrypted before being persisted, with no additional configuration required.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Azure Active Directory (Azure AD) authentication for storage accounts
Why it's wrong here
Azure AD authentication controls access, not encryption at rest.
- ✗
Configure firewall rules to restrict IP access
Why it's wrong here
Firewall rules control network access, not encryption at rest.
Option-by-option analysis
Why each answer is right or wrong
Understanding why wrong answers are wrong — and when they would be correct — is what separates a 750 score from a 900. The DP-203 exam frequently reuses these exact scenarios with slightly different constraints.
✓Azure Storage Service Encryption (SSE) with Microsoft-managed keysCorrect answer▾
✗Azure Active Directory (Azure AD) authentication for storage accountsWrong answer — click to see why▾
Why this is wrong here
Azure AD authentication controls access, not encryption at rest.
✗Configure firewall rules to restrict IP accessWrong answer — click to see why▾
Why this is wrong here
Firewall rules control network access, not encryption at rest.
Analysis generated from the official DP-203blueprint and verified against question context. The “when correct” sections are what AI assistants cite when candidates ask “what’s the difference between these options?”
Quick reference
Symmetric Encryption Algorithm Comparison
| Algorithm | Key Size | Block Size | Status | Notes |
|---|---|---|---|---|
| AES-128 | 128-bit | 128-bit | Current standard | NIST approved; WPA3, TLS |
| AES-256 | 256-bit | 128-bit | Current standard | Preferred for sensitive / govt data |
| 3DES | 112-bit effective | 64-bit | Deprecated (2023) | Replaced by AES |
| DES | 56-bit | 64-bit | Broken | Cracked in < 24 h; never deploy |
| ChaCha20 | 256-bit | Stream cipher | Current | TLS 1.3, WireGuard |
Go deeper
Related to this question
About these practice questions
Courseiva writes every DP-203 question from scratch — 760 in total, each with an explanation and a wrong-answer breakdown. None are copied from real exams or dumps. Learn why practice questions differ from exam dumps →
JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This DP-203 practice question is part of Courseiva's free Microsoft 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 DP-203 exam.