Question 73 of 1,170

Implement and Manage Virtual Networking →mediumMultiple ChoiceObjective-mapped

Quick Answer

The answer is to create a private endpoint for the storage account in a VNet reachable over the site-to-site VPN and configure private DNS zones. This solution is correct because a private endpoint assigns the storage account a private IP address from the Azure VNet that is already connected to your on-premises network via the site-to-site VPN, effectively bringing the storage account into your internal network without exposing a public endpoint. Private DNS zones then ensure that the storage account’s fully qualified domain name (FQDN) resolves to that private IP, allowing seamless connectivity from on-premises while public network access remains disabled. On the AZ-104 exam, this scenario tests your understanding of how private endpoints integrate with hybrid networking—a common trap is assuming a service endpoint or a VPN gateway is sufficient, but only a private endpoint fully removes public exposure. Memory tip: think “Private IP + Private DNS = Private Storage” to remember the two key components.

AZ-104 Implement and Manage Virtual Networking Practice Question

This AZ-104 practice question tests your understanding of implement and manage virtual networking. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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.

An on-premises application connects to Azure through an existing site-to-site VPN. The application must access an Azure Storage account, public network access on the storage account is disabled, and the company does not want the storage account exposed through a public endpoint. Which solution should the administrator implement?

Question 1mediummultiple choice

Read the full VPN explanation →

A
Create a private endpoint for the storage account in a VNet reachable over the VPN and configure private DNS.
A private endpoint gives the storage account a private IP in a VNet, and that private address can be reached from on-premises over the existing VPN. Because public network access is disabled, this is the correct design for private-only access. Private DNS ensures the application resolves the storage name to the private IP rather than the public endpoint.
B
Enable a service endpoint on the on-premises network and allow the storage account firewall to trust it.
Why wrong: Service endpoints are tied to Azure subnets, not arbitrary on-premises networks, so they do not solve access from a datacenter over VPN.
C
Generate a shared access signature and use it from the on-premises application.
Why wrong: A SAS controls authorization, but it does not create a private network path or replace the need for network access to the storage account.
D
Associate a NAT gateway with the on-premises VPN connection.
Why wrong: NAT gateway applies to Azure subnets, not to a site-to-site VPN tunnel, and it does not provide private access to PaaS resources.

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

✓

Create a private endpoint for the storage account in a VNet reachable over the VPN and configure private DNS.

A private endpoint assigns the storage account a private IP from a VNet that is reachable over the site-to-site VPN, effectively bringing the storage account into the on-premises network without exposing a public endpoint. Private DNS zones ensure that the storage account's FQDN resolves to the private IP, enabling seamless connectivity from on-premises while public network access remains disabled.

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.

✓
Create a private endpoint for the storage account in a VNet reachable over the VPN and configure private DNS.
Why this is correct
A private endpoint gives the storage account a private IP in a VNet, and that private address can be reached from on-premises over the existing VPN. Because public network access is disabled, this is the correct design for private-only access. Private DNS ensures the application resolves the storage name to the private IP rather than the public endpoint.
Related concept
Read the scenario before looking for a memorised answer.
✗
Enable a service endpoint on the on-premises network and allow the storage account firewall to trust it.
Why it's wrong here
Service endpoints are tied to Azure subnets, not arbitrary on-premises networks, so they do not solve access from a datacenter over VPN.
✗
Generate a shared access signature and use it from the on-premises application.
Why it's wrong here
A SAS controls authorization, but it does not create a private network path or replace the need for network access to the storage account.
✗
Associate a NAT gateway with the on-premises VPN connection.
Why it's wrong here
NAT gateway applies to Azure subnets, not to a site-to-site VPN tunnel, and it does not provide private access to PaaS resources.

Common exam traps

Common exam trap: answer the scenario, not the keyword

The trap here is that candidates confuse service endpoints with private endpoints, assuming that enabling a service endpoint on the VNet and trusting it in the firewall will allow on-premises traffic, but service endpoints do not provide private IP connectivity and still require the public endpoint to be enabled.

Detailed technical explanation

How to think about this question

Private endpoints use Azure Private Link to map the storage account to a network interface (NIC) in the VNet, with traffic flowing over the Microsoft backbone rather than the internet. The private DNS zone (privatelink.blob.core.windows.net) must be linked to the on-premises DNS or the VNet's DNS server so that the storage account's FQDN resolves to the private IP; otherwise, the on-premises application would still attempt to reach the public endpoint. In a real-world scenario, if the on-premises network uses custom DNS servers, you must configure conditional forwarding to the Azure-provided private DNS zone to ensure resolution works correctly.

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.

Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.

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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: Create a private endpoint for the storage account in a VNet reachable over the VPN and configure private DNS. — A private endpoint assigns the storage account a private IP from a VNet that is reachable over the site-to-site VPN, effectively bringing the storage account into the on-premises network without exposing a public endpoint. Private DNS zones ensure that the storage account's FQDN resolves to the private IP, enabling seamless connectivity from on-premises while public network access remains disabled.

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.

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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. An on-premises application connected through a site-to-site VPN must read data from an Azure Storage account. Public network access is disabled on the storage account, and the storage service must be reachable only by a private IP address inside Azure. Which solution should the administrator implement?

medium

A.Enable a service endpoint on the on-premises network.
✓ B.Create a private endpoint for the storage account in an Azure VNet.
C.Peer the on-premises network directly to the storage account.
D.Use a shared access signature and leave public network access enabled.

Why B: A private endpoint assigns the storage account a private IP address from an Azure VNet, allowing the on-premises application to connect over the site-to-site VPN using that private IP. This ensures the storage service is reachable only within Azure's private network, even with public network access disabled. The private endpoint uses Azure Private Link to securely expose the storage account into the VNet, making it accessible via the VPN without traversing the public internet.

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