Question 1,120 of 1,170

Implement and Manage Storage →easyMultiple SelectObjective-mapped

Quick Answer

The correct answer is to add the subnet to the storage account's networking rules and enable a Microsoft.Storage service endpoint on that subnet. This works because the service endpoint extends the virtual network’s identity to the storage service, allowing traffic from the subnet to reach the storage account over the Azure backbone while keeping the public endpoint enabled but restricted. The storage account firewall then blocks all other traffic, ensuring only that specific subnet has access. On the AZ-104 exam, this scenario tests your understanding of how service endpoints differ from private endpoints—a common trap is confusing the two, but remember that service endpoints work with the firewall to restrict a public endpoint, whereas private endpoints give a private IP. A helpful memory tip is “SEF” for Service Endpoint + Firewall: the service endpoint extends the network, and the firewall locks the door.

AZ-104 Implement and Manage Storage Practice Question

This AZ-104 practice question tests your understanding of implement and manage storage. 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. A key principle to apply: service endpoints extend VNet identity to Azure services.. 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 team wants an Azure Storage account to be reachable only from one subnet, but they do not want to use a private endpoint. Which two configurations should they use? Select two.

Question 1easymulti select

Review the full subnetting walkthrough →

A
Enable a Microsoft.Storage service endpoint on the subnet so the subnet can reach the storage service privately over the Azure backbone.
A service endpoint extends the subnet's identity to the storage service without creating a private IP address.
B
Add the subnet to the storage account's networking rules so only that subnet is allowed through the storage firewall.
The storage firewall must explicitly allow the subnet, otherwise the public endpoint remains blocked.
C
Create a private endpoint and leave the firewall open to all networks so the subnet can be filtered later.
Why wrong: A private endpoint is a different design and the firewall should not be left open when restriction is required.
D
Assign Contributor on the storage account to the subnet, because Azure roles control which networks can connect.
Why wrong: RBAC controls actions, not network reachability to the storage endpoint.
E
Disable the public endpoint and rely on Internet routing, because that is the only way to limit access to one subnet.
Why wrong: Internet routing would not restrict access to one subnet and would not meet the security requirement.

Full breakdown with real-world context →

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 Microsoft.Storage service endpoint on the subnet so the subnet can reach the storage service privately over the Azure backbone.

Option A is correct because enabling a Microsoft.Storage service endpoint on the subnet extends the virtual network identity to the storage service, allowing traffic from that subnet to reach the storage account over the Azure backbone network without using a public IP. This ensures private connectivity from the subnet to the storage account while keeping the storage account's public endpoint enabled but restricted.

Key principle: Service endpoints extend VNet identity to Azure services.

Answer analysis

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

✓
Enable a Microsoft.Storage service endpoint on the subnet so the subnet can reach the storage service privately over the Azure backbone.
Why this is correct
A service endpoint extends the subnet's identity to the storage service without creating a private IP address.
Related concept
Service endpoints extend VNet identity to Azure services.
✓
Add the subnet to the storage account's networking rules so only that subnet is allowed through the storage firewall.
Why this is correct
The storage firewall must explicitly allow the subnet, otherwise the public endpoint remains blocked.
Related concept
Service endpoints extend VNet identity to Azure services.
✗
Create a private endpoint and leave the firewall open to all networks so the subnet can be filtered later.
Why it's wrong here
A private endpoint is a different design and the firewall should not be left open when restriction is required.
✗
Assign Contributor on the storage account to the subnet, because Azure roles control which networks can connect.
Why it's wrong here
RBAC controls actions, not network reachability to the storage endpoint.
✗
Disable the public endpoint and rely on Internet routing, because that is the only way to limit access to one subnet.
Why it's wrong here
Internet routing would not restrict access to one subnet and would not meet the security requirement.

Common exam traps

Common exam trap: answer the scenario, not the keyword

The trap here is that candidates confuse Azure RBAC roles (which control management access) with network-level access controls (firewall rules and service endpoints), leading them to incorrectly select option D.

Detailed technical explanation

How to think about this question

Service endpoints work by adding the subnet's virtual network ID to the storage account's firewall allow list, and traffic from the subnet to the storage service uses the Azure backbone with the source IP replaced by the virtual network's private address space (RFC 1918). The storage account firewall rules evaluate network ACLs before any authentication, so even with a valid SAS token, traffic from outside the allowed subnet is blocked. In a real-world scenario, this is commonly used to secure storage accounts for application tiers running in a specific subnet without incurring the cost or complexity of private endpoints.

KKey Concepts to Remember

Service endpoints extend VNet identity to Azure services.
Traffic over service endpoints uses the Azure backbone.
Storage account firewalls restrict access based on IP or VNet rules.
Service endpoints are an alternative to private endpoints for secure VNet access.

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

Service endpoints extend VNet identity to Azure services.

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 service endpoints extend VNet identity to Azure services., then practise related AZ-104 questions on the same topic to reinforce the concept.

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FAQ

Questions learners often ask

What does this AZ-104 question test?

Implement and Manage Storage — This question tests Implement and Manage Storage — Service endpoints extend VNet identity to Azure services..

What is the correct answer to this question?

The correct answer is: Enable a Microsoft.Storage service endpoint on the subnet so the subnet can reach the storage service privately over the Azure backbone. — Option A is correct because enabling a Microsoft.Storage service endpoint on the subnet extends the virtual network identity to the storage service, allowing traffic from that subnet to reach the storage account over the Azure backbone network without using a public IP. This ensures private connectivity from the subnet to the storage account while keeping the storage account's public endpoint enabled but restricted.

What should I do if I get this AZ-104 question wrong?

Review service endpoints extend VNet identity to Azure services., then practise related AZ-104 questions on the same topic to reinforce the concept.

What is the key concept behind this question?

Service endpoints extend VNet identity to Azure services.

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Same concept, more angles

1 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 team wants to restrict a storage account so only one Azure subnet can reach it. They do not need a private IP address, and they are fine with the storage account still using its public endpoint. Which configuration should the administrator use?

medium

A.Create a private endpoint and disable public network access.
✓ B.Enable a service endpoint on the subnet and allow that subnet in the storage account firewall.
C.Generate a user delegation SAS token and distribute it only to the subnet.
D.Change the redundancy setting to ZRS and enable soft delete.

Why B: Option B is correct because a service endpoint extends the virtual network identity to the storage account over the public endpoint, allowing the administrator to restrict access to only traffic originating from that specific subnet via the storage account firewall. This meets the requirement of using the public endpoint while limiting access to a single Azure subnet without needing a private IP address.

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