The answer is to use Azure Private Endpoint or a service endpoint with a VNet. This is correct because both options ensure that all traffic to Azure Data Lake Storage Gen2 remains within the corporate network, never traversing the public internet. A Private Endpoint assigns a private IP address from your virtual network to the storage account, effectively isolating it from any public endpoint and blocking access from outside the corporate network. On the DP-203 exam, this scenario tests your understanding of network isolation for Azure Data Lake Storage Gen2 as a core data security requirement, often appearing in questions about preventing data exfiltration or enforcing a zero-trust perimeter. A common trap is choosing firewall rules alone, which still allow public internet traffic if the IP allowlist is misconfigured. Remember the memory tip: “Private IP, public no—Private Endpoint is the way to go.”
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.
You are designing data security for Azure Data Lake Storage Gen2. The requirement is to prevent data from being accessed by anyone outside the corporate network. Which feature should you enable?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use Azure Private Endpoint or service endpoint with a VNet.
Azure Private Endpoint or service endpoint with a VNet ensures that all traffic to the storage account stays within the corporate network and never traverses the public internet. Private Endpoint assigns a private IP from the VNet to the storage account, effectively isolating it from public access. This meets the requirement to prevent access from outside the corporate network by enforcing network-level isolation.
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.
✓
Use Azure Private Endpoint or service endpoint with a VNet.
Why this is correct
Private endpoint ensures data is accessed only from within the VNet.
Related concept
Read the scenario before looking for a memorised answer.
✗
Assign RBAC roles to deny access to all except corporate users.
Why it's wrong here
RBAC controls access based on identity, not network location.
✗
Configure IP firewall rules to allow only corporate IP ranges.
Why it's wrong here
IP firewall allows specific IPs but not network-level restriction via VNet.
✗
Enable encryption at rest using customer-managed keys.
Why it's wrong here
Encryption protects data if accessed but does not restrict access.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse network-level security (Private Endpoint) with access control (RBAC) or data protection (encryption), thinking that denying RBAC roles or enabling encryption alone can prevent external access, when only network isolation truly blocks traffic from outside the corporate network.
Detailed technical explanation
How to think about this question
Azure Private Endpoint uses a network interface with a private IP from your VNet, leveraging Azure Private Link to route traffic through the Microsoft backbone network. This eliminates exposure to the public internet and can be combined with network security groups (NSGs) for granular traffic filtering. In contrast, service endpoints provide a direct route to the storage service over the Azure backbone but still leave the storage account with a public endpoint, making it less secure than Private Endpoint for strict isolation 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.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this DP-203 question in full detail.
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 Azure Private Endpoint or service endpoint with a VNet. — Azure Private Endpoint or service endpoint with a VNet ensures that all traffic to the storage account stays within the corporate network and never traverses the public internet. Private Endpoint assigns a private IP from the VNet to the storage account, effectively isolating it from public access. This meets the requirement to prevent access from outside the corporate network by enforcing network-level isolation.
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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Question Discussion
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