- A
A service endpoint on the subnet so the storage account uses a private IP address.
Why wrong: Service endpoints do not give the storage account a private IP address in the VNet.
- B
A private DNS zone for the storage blob endpoint linked to VNet-App.
Private DNS is needed so the blob FQDN resolves to the private endpoint IP inside the VNet.
- C
A storage account access key on the VM so the public endpoint will accept the connection.
Why wrong: Authentication does not fix name resolution or the fact that public network access is disabled.
- D
A user-defined route sending storage traffic to the virtual network gateway.
Why wrong: A route table does not rewrite DNS and does not provide private endpoint name resolution.
Question 759 of 1,170
Azure Storage Private Endpoint DNS Resolution
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 has public network access disabled. A VM in VNet-App can reach a private endpoint for the account, but the storage name still resolves to the public IP address from the VM, and connections are denied. 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
✓
A private DNS zone for the storage blob endpoint linked to VNet-App.
When public network access is disabled on a storage account and a private endpoint is configured, the storage account's public DNS name must resolve to the private endpoint's private IP address within the virtual network. By default, the DNS name continues to resolve to the public IP address, causing connection failures. Linking a private DNS zone (privatelink.blob.core.windows.net) to VNet-App enables automatic resolution of the storage blob endpoint to the private IP address, allowing the VM to connect successfully.
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.
- ✗
A service endpoint on the subnet so the storage account uses a private IP address.
Why it's wrong here
Service endpoints do not give the storage account a private IP address in the VNet.
When this WOULD be correct
A service endpoint would be correct if the storage account has public network access enabled and the goal is to restrict access to a specific subnet, or if the VM needs to access the storage account via the Microsoft.Storage service endpoint without using a private endpoint.
- ✓
A private DNS zone for the storage blob endpoint linked to VNet-App.
Why this is correct
Private DNS is needed so the blob FQDN resolves to the private endpoint IP inside the VNet.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
A storage account access key on the VM so the public endpoint will accept the connection.
Why it's wrong here
Authentication does not fix name resolution or the fact that public network access is disabled.
When this WOULD be correct
If the storage account had public network access enabled but was configured to require firewall rules, and the VM needed to authenticate using an access key from a non-trusted network, then providing the access key on the VM would allow the connection through the public endpoint.
- ✗
A user-defined route sending storage traffic to the virtual network gateway.
Why it's wrong here
A route table does not rewrite DNS and does not provide private endpoint name resolution.
When this WOULD be correct
A UDR would be correct in a scenario where an organization wants to force all outbound traffic from a subnet to the internet through a network virtual appliance (NVA) or firewall for inspection, and the storage account is accessed via its public endpoint (no private endpoint). The UDR would route traffic to the NVA/gateway for security controls.
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.
✓A private DNS zone for the storage blob endpoint linked to VNet-App.Correct answer▾
Why this is correct
Private DNS is needed so the blob FQDN resolves to the private endpoint IP inside the VNet.
✗A service endpoint on the subnet so the storage account uses a private IP address.Wrong answer — click to see why▾
Why this is wrong here
A service endpoint does not change DNS resolution; the storage account name would still resolve to its public IP address. Since public network access is disabled, the connection would still be denied even with a service endpoint.
★ When this WOULD be the correct answer
A service endpoint would be correct if the storage account has public network access enabled and the goal is to restrict access to a specific subnet, or if the VM needs to access the storage account via the Microsoft.Storage service endpoint without using a private endpoint.
Why candidates choose this
Candidates may confuse service endpoints with private endpoints, thinking both provide private IP connectivity, but service endpoints do not alter DNS resolution or provide a private IP address.
✗A storage account access key on the VM so the public endpoint will accept the connection.Wrong answer — click to see why▾
Why this is wrong here
The storage account has public network access disabled, so even with an access key, the public endpoint will reject connections. The VM cannot reach the storage via its public IP because access is blocked at the storage account level.
★ When this WOULD be the correct answer
If the storage account had public network access enabled but was configured to require firewall rules, and the VM needed to authenticate using an access key from a non-trusted network, then providing the access key on the VM would allow the connection through the public endpoint.
Why candidates choose this
Candidates may think that providing the access key is sufficient for authentication regardless of network restrictions, overlooking that the storage account's public network access is disabled, which blocks all public endpoint traffic.
✗A user-defined route sending storage traffic to the virtual network gateway.Wrong answer — click to see why▾
Why this is wrong here
A user-defined route (UDR) sending storage traffic to the virtual network gateway is unnecessary because the private endpoint already provides a direct, private connection to the storage account within the same virtual network. The issue is DNS resolution, not routing; traffic is already reaching the public IP due to default DNS behavior.
★ When this WOULD be the correct answer
A UDR would be correct in a scenario where an organization wants to force all outbound traffic from a subnet to the internet through a network virtual appliance (NVA) or firewall for inspection, and the storage account is accessed via its public endpoint (no private endpoint). The UDR would route traffic to the NVA/gateway for security controls.
Why candidates choose this
Candidates may confuse routing issues with DNS resolution problems, thinking that a UDR can force traffic to a private IP, but private endpoints rely on DNS, not routing, to direct traffic to the private IP.
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 confuse service endpoints (which still use the public endpoint) with private endpoints (which use a private IP address), and assume that disabling public network access alone is sufficient without configuring DNS resolution to point to the private endpoint.
Detailed technical explanation
How to think about this question
Private endpoints use Azure Private Link to assign a private IP address from the virtual network to the storage account. The private DNS zone (privatelink.blob.core.windows.net) must be linked to the virtual network to override the public DNS resolution; without it, the VM's DNS query returns the public IP address, and the connection is denied because the storage account's firewall blocks all public traffic. This DNS resolution behavior is governed by Azure's DNS architecture, where a private DNS zone takes precedence over public DNS for linked virtual networks.
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
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
- →
Implement and Manage Virtual Networking — study guide chapter
Learn the concepts, then practise the questions
- →
Implement and Manage Virtual Networking practice questions
Targeted practice on this topic area only
- →
All AZ-104 questions
1,170 questions across all exam domains
- →
AZ-104 study guide
Full concept coverage aligned to exam objectives
- →
AZ-104 practice test guide
How to use practice tests most effectively before exam day
Related practice questions
Related AZ-104 practice-question pages
Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.
Manage Azure Identities and Governance practice questions
Practise AZ-104 questions linked to Manage Azure Identities and Governance.
Implement and Manage Storage practice questions
Practise AZ-104 questions linked to Implement and Manage Storage.
Deploy and Manage Azure Compute practice questions
Practise AZ-104 questions linked to Deploy and Manage Azure Compute.
Implement and Manage Virtual Networking practice questions
Practise AZ-104 questions linked to Implement and Manage Virtual Networking.
Monitor and Maintain Azure Resources practice questions
Practise AZ-104 questions linked to Monitor and Maintain Azure Resources.
AZ-104 Azure RBAC practice questions
Practise AZ-104 questions linked to AZ-104 Azure RBAC.
AZ-104 storage account practice questions
Practise AZ-104 questions linked to AZ-104 storage account.
AZ-104 virtual network practice questions
Practise AZ-104 questions linked to AZ-104 virtual network.
AZ-104 NSG practice questions
Practise AZ-104 questions linked to AZ-104 NSG.
AZ-104 Azure Monitor practice questions
Practise AZ-104 questions linked to AZ-104 Azure Monitor.
AZ-104 backup practice questions
Practise AZ-104 questions linked to AZ-104 backup.
AZ-104 managed identity practice questions
Practise AZ-104 questions linked to AZ-104 managed identity.
Practice this exam
Start a free AZ-104 practice session
Short sessions build daily habit. Longer sessions build exam-day stamina. Try a timed session to simulate real conditions.
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: A private DNS zone for the storage blob endpoint linked to VNet-App. — When public network access is disabled on a storage account and a private endpoint is configured, the storage account's public DNS name must resolve to the private endpoint's private IP address within the virtual network. By default, the DNS name continues to resolve to the public IP address, causing connection failures. Linking a private DNS zone (privatelink.blob.core.windows.net) to VNet-App enables automatic resolution of the storage blob endpoint to the private IP address, allowing the VM to connect successfully.
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
8 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. An application in a VNet must access an Azure Storage account over a private IP address. Public network access is disabled on the storage account, and the app must resolve the normal blob FQDN to that private address only from within the VNet. What should the administrator configure?
hard- A.A service endpoint on the subnet and a storage account firewall rule for the subnet.
- ✓ B.A private endpoint for the blob service and a linked private DNS zone for the VNet.
- C.Allow trusted Microsoft services on the storage account and keep the public endpoint enabled.
- D.Create a public DNS record that maps the blob FQDN to the storage account's public IP address.
Why B: Option B is correct because a private endpoint assigns the storage account a private IP from the VNet, and linking a private DNS zone (e.g., `privatelink.blob.core.windows.net`) to the VNet ensures that the blob FQDN resolves to that private IP only from within the VNet. This meets the requirement of disabling public network access while providing private connectivity and DNS resolution.
Variation 2. A payroll application in a VNet must access an Azure Storage account containing confidential blobs. The security team requires the storage account to be reachable only over a private IP, and public network access must be disabled. Which feature should the administrator implement?
medium- A.A service endpoint for Microsoft.Storage on the application subnet.
- ✓ B.A private endpoint for the storage account in the VNet.
- C.A shared access signature embedded in the application configuration.
- D.A VPN gateway connection between the subnet and the storage account.
Why B: A private endpoint assigns the storage account a private IP address from the VNet, enabling secure access over a private connection while completely disabling public network access. This meets the security team's requirement because traffic never traverses the public internet, and the storage account's firewall can be configured to deny all public traffic.
Variation 3. A storage account has public network access disabled. An application runs on a VM in a VNet and must access the storage account over a private IP address. The team also wants the storage name to resolve to a private address inside the VNet without changing application code. What should the administrator create?
medium- A.A service endpoint on the subnet and a storage account firewall rule allowing that subnet.
- ✓ B.A private endpoint for the storage account and a corresponding private DNS zone link.
- C.An account SAS token with read/write permissions for the application.
- D.Allow trusted Microsoft services to bypass the storage firewall.
Why B: A private endpoint assigns the storage account a private IP from the VNet, making it accessible over a private IP address. A corresponding private DNS zone link (e.g., privatelink.blob.core.windows.net) ensures the storage account name resolves to that private IP inside the VNet without modifying application code, meeting both requirements.
Variation 4. A VM in a virtual network must access an Azure Storage account over a private IP address, and the storage account's public endpoint must be disabled. Name resolution from the VM should resolve the storage name to the private IP. Which configuration should you use?
medium- A.Service endpoint on the subnet plus public DNS, because the storage account will expose a private IP automatically.
- ✓ B.Private endpoint with a private DNS zone linked to the virtual network.
- C.Network security group rules only, because they can force traffic to use private addressing.
- D.Storage account firewall rules with Allow trusted Microsoft services, because that gives a private address path.
Why B: Option B is correct because a private endpoint assigns a private IP from the virtual network to the storage account, effectively bringing the service into the VNet. By linking a private DNS zone to the virtual network, the VM's DNS resolution for the storage account name returns the private IP instead of the public endpoint, satisfying both the private connectivity and public endpoint disablement requirements.
Variation 5. A storage account has public network access disabled. An app in a VNet must read and write blobs privately, and the team wants the blob endpoint name to resolve to a private IP without exposing the service publicly. What should the administrator configure?
medium- A.A service endpoint on the subnet and a storage firewall allow rule.
- B.A public IP address for the app and allow access from that IP in the storage firewall.
- C.An NSG rule that allows outbound TCP 443 from the app subnet to storage.
- ✓ D.A private endpoint for the storage account and a private DNS zone for blob name resolution.
Why D: Option D is correct because a private endpoint assigns the storage account a private IP from the VNet, ensuring all traffic to the blob endpoint stays within Microsoft's backbone. A private DNS zone (e.g., `privatelink.blob.core.windows.net`) is required so that the blob endpoint name resolves to that private IP instead of the public IP, meeting the requirement for private name resolution without any public exposure.
Variation 6. A storage account has public network access disabled. A VM in a virtual network must access blob data privately, and the application must resolve the storage endpoint name to a private IP address. What should the administrator deploy?
medium- A.A service endpoint for Microsoft.Storage and a custom hosts file entry on the VM
- ✓ B.A private endpoint for the storage account plus a private DNS zone linked to the virtual network
- C.Allow trusted Microsoft services and keep using the public endpoint
- D.A route table that sends traffic for the storage account's public IP to the VPN gateway
Why B: A private endpoint assigns the storage account a private IP from the VM's virtual network, enabling direct, secure access over the Microsoft backbone. A private DNS zone linked to the virtual network ensures the storage endpoint name (e.g., mystorageaccount.blob.core.windows.net) resolves to that private IP, meeting the requirement for private name resolution without relying on public DNS or hosts file entries.
Variation 7. Based on the exhibit, what should the administrator create so VMs in AppSubnet can access the storage account over a private IP address?
easy- A.A service endpoint for Microsoft.Storage on AppSubnet.
- ✓ B.A private endpoint for the storage account in AppSubnet.
- C.A site-to-site VPN gateway between AppVNet and the storage account.
- D.An application security group for the storage account and subnet.
Why B: A private endpoint assigns a private IP address from AppSubnet to the storage account, enabling VMs in that subnet to access the storage account over a private IP within the VNet. This eliminates exposure to the public internet and uses Azure Private Link for secure, direct connectivity.
Variation 8. An application VM in a subnet without a public IP must access Azure Blob Storage. The storage account must not be reachable from the public internet, and DNS resolution should stay inside the virtual network. What should you implement?
medium- A.Enable a service endpoint for Microsoft.Storage on the subnet and keep the public endpoint enabled.
- ✓ B.Create a private endpoint for the storage account and link the appropriate private DNS zone.
- C.Use a SAS token and allow access from any network for the storage account.
- D.Assign a managed identity to the VM and remove all network restrictions from the storage account.
Why B: Option B is correct because a private endpoint assigns the storage account a private IP from the VM's virtual network, making it reachable without public internet exposure. Linking the private DNS zone ensures that DNS resolution for the storage account (e.g., `mystorageaccount.blob.core.windows.net`) resolves to the private IP within the VNet, meeting both requirements.
Keep practising
More AZ-104 practice questions
- A storage automation service principal must upload, read, and delete blob data in one container by using Microsoft Entra…
- A subnet contains several application servers. You need to allow inbound TCP 3389 only from a management subnet named Su…
- A subscription admin wants to investigate who changed a resource and also review the platform-generated events for that…
- Based on the exhibit, which Azure feature should the administrator use to track this kind of platform-wide service issue…
- An administrator wants a script running on an Azure VM to create a resource in Azure without storing any passwords or cl…
- A PowerShell script runs on an Azure VM every night and uses Azure CLI commands to create tags and VM resources in anoth…
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.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.