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DP-203 Private endpoint Practice Question
You have an Azure Data Lake Storage Gen2 account that stores sensitive customer data. You need to prevent data exfiltration to unauthorized external IP addresses. Which TWO actions should you take?
⚠ Common exam trap
Candidates often confuse Azure Firewall (a network security service) with storage firewall settings. Also, they might think that restricting SAS tokens alone prevents exfiltration, but SAS does not block external IPs.
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 private endpoints for the storage account
Network security controls: enabling the storage firewall to allow only specific virtual networks (Option D) restricts access to traffic originating from those VNets, blocking external IPs. Using private endpoints (Option A) ensures that all traffic to the storage account stays within the Microsoft backbone network, preventing exposure to the public internet. Option B is incorrect because Azure Firewall is a separate service, not a storage account setting. Option C (SAS) provides fine-grained access control but does not prevent exfiltration from external IPs. Option E (GRS) is for data durability, not security.
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 private endpoints for the storage account
Why this is correct
Private endpoints ensure that all traffic to the storage account remains within the Microsoft backbone network, effectively preventing access from unauthorized external IPs.
- ✗
Enable Azure Firewall on the storage account
Why it's wrong here
Azure Firewall is a managed network security service, but it is not directly enabled on a storage account. The storage account has its own firewall settings.
- ✗
Use shared access signatures (SAS) with limited permissions
Why it's wrong here
SAS tokens grant specific permissions but do not prevent exfiltration; they control who can access but not from where.
- ✓
Configure storage firewall to allow only specific virtual networks
Why this is correct
Configuring the storage firewall to allow only specific virtual networks restricts access to traffic originating from those VNets, blocking external IPs.
- ✗
Enable geo-redundant storage (GRS)
Why it's wrong here
Geo-redundant storage replicates data to another region for durability, not for preventing exfiltration.
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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.