- A
Apply a network security group (NSG) to the subnet with a deny rule for internet traffic.
Why wrong: NSGs do not apply to PaaS storage accounts.
- B
Create a private endpoint for the storage account and disable public network access.
Traffic goes through Private Link, staying on Microsoft network.
- C
Set the firewall to deny all and add a rule to allow only your VNet's public IP.
Why wrong: Public IPs route traffic over the internet.
- D
Enable service endpoints and configure a service endpoint policy.
Why wrong: Service endpoints do not prevent data exfiltration; the storage account is still publicly accessible.
AZ-500 Secure compute, storage, and databases Practice Question
This AZ-500 practice question tests your understanding of secure compute, storage, and databases. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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.
Your company uses Azure Blob Storage to store sensitive documents. You need to prevent data exfiltration by ensuring that all access to the storage account is through Microsoft's private network. What should you configure?
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
Create a private endpoint for the storage account and disable public network access.
Option C is correct because Azure Private Link with Private Endpoint ensures that traffic to the storage account stays within the Microsoft backbone network. Service endpoints also keep traffic on the Azure backbone but do not prevent exfiltration if the storage account is exposed to the internet. Option A is wrong because service endpoints do not block internet access. Option B is wrong because firewall rules only restrict IPs, but traffic may still leave Azure backbone. Option D is wrong because network security groups (NSGs) are for subnets, not storage accounts.
Key principle: Count usable hosts — not total addresses — and remember that the network and broadcast addresses are not available to hosts in standard IPv4 subnets.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Apply a network security group (NSG) to the subnet with a deny rule for internet traffic.
Why it's wrong here
NSGs do not apply to PaaS storage accounts.
- ✓
Create a private endpoint for the storage account and disable public network access.
Why this is correct
Traffic goes through Private Link, staying on Microsoft network.
Related concept
CIDR notation defines the prefix length.
- ✗
Set the firewall to deny all and add a rule to allow only your VNet's public IP.
Why it's wrong here
Public IPs route traffic over the internet.
- ✗
Enable service endpoints and configure a service endpoint policy.
Why it's wrong here
Service endpoints do not prevent data exfiltration; the storage account is still publicly accessible.
Common exam traps
Common exam trap: usable hosts are not the same as total addresses
Subnetting questions often tempt you into counting all addresses. In normal IPv4 subnets, the network and broadcast addresses are not usable host addresses.
Detailed technical explanation
How to think about this question
Subnetting questions test whether you can identify the network, broadcast address, usable range, mask and correct subnet. Slow down enough to calculate the block size correctly.
KKey Concepts to Remember
- CIDR notation defines the prefix length.
- Block size helps identify subnet boundaries.
- Network and broadcast addresses are not usable hosts in normal IPv4 subnets.
- The required host count determines the smallest suitable subnet.
TExam Day Tips
- Write the block size before choosing the subnet.
- Check whether the question asks for hosts, subnets or a specific address range.
- Do not confuse /24, /25, /26 and /27 host counts.
Key takeaway
Count usable hosts — not total addresses — and remember that the network and broadcast addresses are not available to hosts in standard IPv4 subnets.
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.
What to study next
Got this wrong? Here's your next step.
Review block sizes, usable host formulas (2^n − 2), and how to find network and broadcast addresses for /24 through /30. Then practise related AZ-500 subnetting questions on CIDR, address ranges, and subnet selection.
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Secure compute, storage, and databases — study guide chapter
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FAQ
Questions learners often ask
What does this AZ-500 question test?
Secure compute, storage, and databases — This question tests Secure compute, storage, and databases — CIDR notation defines the prefix length..
What is the correct answer to this question?
The correct answer is: Create a private endpoint for the storage account and disable public network access. — Option C is correct because Azure Private Link with Private Endpoint ensures that traffic to the storage account stays within the Microsoft backbone network. Service endpoints also keep traffic on the Azure backbone but do not prevent exfiltration if the storage account is exposed to the internet. Option A is wrong because service endpoints do not block internet access. Option B is wrong because firewall rules only restrict IPs, but traffic may still leave Azure backbone. Option D is wrong because network security groups (NSGs) are for subnets, not storage accounts.
What should I do if I get this AZ-500 question wrong?
Review block sizes, usable host formulas (2^n − 2), and how to find network and broadcast addresses for /24 through /30. Then practise related AZ-500 subnetting questions on CIDR, address ranges, and subnet selection.
What is the key concept behind this question?
CIDR notation defines the prefix length.
About these practice questions
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Last reviewed: Jun 20, 2026
This AZ-500 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 AZ-500 exam.
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