- A
Add a private endpoint and disable public network access
Why wrong: That would remove public endpoint access for the on-premises server, which violates the requirement.
- B
Enable a service endpoint on the subnet and add that subnet to the storage account networking rules
A service endpoint lets traffic from the chosen Azure subnet reach the storage account over the Microsoft backbone while still using the account's public endpoint. Adding the subnet to the storage account firewall rules then restricts Azure access to only that subnet. This meets the requirement to keep public access available for the on-premises integration server while tightly limiting Azure-based access without private endpoints or DNS changes.
- C
Create a SAS token restricted to that subnet
Why wrong: SAS tokens control data authorization, but they cannot restrict traffic to a specific subnet.
- D
Assign Storage Blob Data Reader to the subnet
Why wrong: RBAC cannot be assigned to a subnet, and data-plane permissions do not enforce network origin restrictions.
Quick Answer
The answer is to enable a service endpoint on the subnet and add that subnet to the storage account networking rules. This configuration works because a service endpoint extends the virtual network’s identity to the storage account, allowing you to restrict access to a single Azure subnet while keeping the public endpoint fully active for on-premises traffic. The key technical concept here is that service endpoints do not replace the public endpoint or require DNS changes; they simply add a network rule that filters inbound traffic by source subnet. On the AZ-104 exam, this scenario tests your understanding of how to balance hybrid connectivity with Azure network segmentation—a common trap is assuming you must disable the public endpoint or use a private endpoint, but the requirement explicitly forbids both. Remember the memory tip: “Service endpoint, subnet only—public stays open, no DNS lonely.”
AZ-104 Implement and Manage Virtual Networking Practice Question
This AZ-104 practice question tests your understanding of implement and manage virtual networking. 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.
A storage account must remain reachable through its public endpoint for an on-premises integration server, but only one Azure subnet should be allowed to access it from Azure. The team does not want private endpoints or DNS changes. What should the administrator 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
Enable a service endpoint on the subnet and add that subnet to the storage account networking rules
Option B is correct because a service endpoint extends the virtual network identity to the storage account, allowing you to restrict access to a specific subnet while keeping the public endpoint enabled for on-premises access. This meets the requirement of allowing only one Azure subnet to access the storage account from Azure without using private endpoints or DNS changes.
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.
- ✗
Add a private endpoint and disable public network access
Why it's wrong here
That would remove public endpoint access for the on-premises server, which violates the requirement.
- ✓
Enable a service endpoint on the subnet and add that subnet to the storage account networking rules
Why this is correct
A service endpoint lets traffic from the chosen Azure subnet reach the storage account over the Microsoft backbone while still using the account's public endpoint. Adding the subnet to the storage account firewall rules then restricts Azure access to only that subnet. This meets the requirement to keep public access available for the on-premises integration server while tightly limiting Azure-based access without private endpoints or DNS changes.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Create a SAS token restricted to that subnet
Why it's wrong here
SAS tokens control data authorization, but they cannot restrict traffic to a specific subnet.
- ✗
Assign Storage Blob Data Reader to the subnet
Why it's wrong here
RBAC cannot be assigned to a subnet, and data-plane permissions do not enforce network origin restrictions.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse service endpoints with private endpoints, assuming that service endpoints require disabling public access or that private endpoints are the only way to restrict subnet access, when in fact service endpoints allow selective subnet access while keeping the public endpoint active.
Detailed technical explanation
How to think about this question
Service endpoints use the source IP address of the traffic from the subnet to enforce network rules at the storage account firewall, effectively allowing only traffic from that subnet while the public endpoint remains accessible. Under the hood, the storage account's firewall evaluates the virtual network rule by checking the source IP against the subnet's prefix, and the service endpoint ensures the traffic is tagged with the subnet's virtual network ID. In a real-world scenario, this is commonly used when an on-premises server needs to upload data to blob storage via the public internet, while an Azure VM in a specific subnet must access the same storage account without traversing the internet.
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.
What to study next
Got this wrong? Here's your next step.
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FAQ
Questions learners often ask
What does this AZ-104 question test?
Implement and Manage Virtual Networking — This question tests Implement and Manage Virtual Networking — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Enable a service endpoint on the subnet and add that subnet to the storage account networking rules — Option B is correct because a service endpoint extends the virtual network identity to the storage account, allowing you to restrict access to a specific subnet while keeping the public endpoint enabled for on-premises access. This meets the requirement of allowing only one Azure subnet to access the storage account from Azure without using private endpoints or DNS changes.
What should I do if I get this AZ-104 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.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Same concept, more angles
2 more ways this is tested on AZ-104
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. A storage account must be reachable only from a single subnet. The team wants to keep the storage public endpoint in place, avoid a private endpoint, and avoid managing any custom DNS records. Which change best meets the requirement?
hard- A.Add a network security group rule to the subnet that allows outbound TCP 443 to the storage account.
- ✓ B.Enable a service endpoint for Microsoft.Storage on the subnet and add the subnet to the storage account firewall allow list.
- C.Create a private endpoint and set the storage account to use a private DNS zone.
- D.Create a route table that sends storage traffic through an Azure Firewall appliance.
Why B: Option B is correct because enabling a service endpoint for Microsoft.Storage on the subnet injects the subnet's identity into the traffic to the storage account, allowing the storage account firewall to permit access only from that subnet while keeping the public endpoint active. This avoids the need for a private endpoint, custom DNS records, or additional routing appliances, directly meeting the requirement of restricting access to a single subnet.
Variation 2. A storage account must be reachable only from one subnet. The team does not want to deploy a private endpoint or manage private DNS zones, and they are acceptable with the storage account continuing to use its public endpoint. Which feature should be configured on the subnet?
medium- A.A private endpoint for the storage account
- ✓ B.A service endpoint for Microsoft.Storage
- C.A route table with a default route to the storage account
- D.An application security group containing the subnet
Why B: Option B is correct because a service endpoint for Microsoft.Storage allows a subnet to restrict access to a storage account's public endpoint without deploying a private endpoint or managing private DNS zones. When enabled, Azure adds the subnet's identity to traffic from that subnet, and the storage account's firewall can be configured to allow only that specific subnet, keeping the public endpoint active.
Last reviewed: Jun 11, 2026
This AZ-104 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-104 exam.
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