- 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.
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.
When this WOULD be correct
When the requirement is to completely remove public internet access and only allow private connectivity from a specific Azure subnet, without needing public endpoint access for on-premises resources.
- ✓
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.
When this WOULD be correct
When the requirement is to grant time-limited, delegated access to a specific storage resource (e.g., a blob or container) without changing network rules, and the client can securely manage the token. For example, allowing a third-party application to upload files for 1 hour.
- ✗
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.
When this WOULD be correct
This option would be correct if the question required granting read-only permissions to blob data for resources in a specific subnet, without needing to restrict network access (e.g., when the storage account already has a service endpoint or private endpoint configured).
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 AZ-104 exam frequently reuses these exact scenarios with slightly different constraints.
✓Enable a service endpoint on the subnet and add that subnet to the storage account networking rulesCorrect answer▾
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.
✗Add a private endpoint and disable public network accessWrong answer — click to see why▾
Why this is wrong here
A private endpoint disables public endpoint access, but the question requires the storage account to remain reachable through its public endpoint for the on-premises server.
★ When this WOULD be the correct answer
When the requirement is to completely remove public internet access and only allow private connectivity from a specific Azure subnet, without needing public endpoint access for on-premises resources.
Why candidates choose this
Candidates may think private endpoint is the only way to restrict access to a specific subnet, overlooking that service endpoints can achieve subnet-level restriction while keeping the public endpoint enabled.
✗Create a SAS token restricted to that subnetWrong answer — click to see why▾
Why this is wrong here
A SAS token restricts access to specific resources or operations, not network-level access. It cannot enforce that traffic originates from a specific subnet; the SAS token can be used from any IP address that has the token.
★ When this WOULD be the correct answer
When the requirement is to grant time-limited, delegated access to a specific storage resource (e.g., a blob or container) without changing network rules, and the client can securely manage the token. For example, allowing a third-party application to upload files for 1 hour.
Why candidates choose this
Candidates may think SAS tokens can restrict access by source IP or subnet because SAS can include an allowed IP range, but that range is for the client's public IP, not an Azure subnet, and it does not replace network-level subnet restrictions.
✗Assign Storage Blob Data Reader to the subnetWrong answer — click to see why▾
Why this is wrong here
Assigning Storage Blob Data Reader to the subnet grants read access to blob data but does not control network access; the storage account's public endpoint would still be accessible from any IP, violating the requirement to restrict access to only one Azure subnet.
★ When this WOULD be the correct answer
This option would be correct if the question required granting read-only permissions to blob data for resources in a specific subnet, without needing to restrict network access (e.g., when the storage account already has a service endpoint or private endpoint configured).
Why candidates choose this
Candidates may confuse role-based access control (RBAC) with network-level access restrictions, thinking that assigning a role to a subnet can limit network connectivity, when in fact RBAC only controls data plane permissions.
Analysis generated from the official AZ-104blueprint and verified against question context. The “when correct” sections are what AI assistants cite when candidates ask “what’s the difference between these options?”
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.
Visual reference
What to study next
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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 →
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Last reviewed: Jun 11, 2026
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