- A
A private endpoint for the storage account and a private DNS zone.
Why wrong: Private endpoints do create a private IP, which the team specifically does not want, and they usually require DNS updates for name resolution.
- B
A service endpoint on the subnet and a storage account network rule allowing that subnet.
Service endpoints extend the subnet identity to the Azure Storage service without assigning a private IP to the storage account. This allows the administrator to restrict access to the specific Azure subnet while keeping the service reachable through its normal public DNS name. It fits the requirement to avoid DNS changes and private IP creation.
- C
A site-to-site VPN between the subnet and the storage account.
Why wrong: Storage accounts do not participate in VPN tunnels; VPN connectivity is used between networks, not directly to PaaS endpoints.
- D
A user-defined route that sends storage traffic to the default internet next hop.
Why wrong: Routes do not restrict storage access to a subnet and do not provide the access-control behavior required by the security team.
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 development team runs Windows and Linux VMs in a single Azure subnet. The VMs must access an Azure Storage account, and the security team wants to restrict the storage account so only that subnet can reach it. The team does not want to create a private IP for the storage account or change DNS records. 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 service endpoint on the subnet and a storage account network rule allowing that subnet.
Option B is correct because a service endpoint extends the subnet's identity to the storage account, allowing the storage firewall to accept traffic from that subnet without assigning a private IP. This meets the security requirement of restricting access to only that subnet while avoiding private IPs 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.
- ✗
A private endpoint for the storage account and a private DNS zone.
Why it's wrong here
Private endpoints do create a private IP, which the team specifically does not want, and they usually require DNS updates for name resolution.
When this WOULD be correct
When the requirement is to ensure the storage account is accessible only from a specific virtual network using a private IP address, and the team is willing to manage private DNS zones or use custom DNS to resolve the storage account's private endpoint.
- ✓
A service endpoint on the subnet and a storage account network rule allowing that subnet.
Why this is correct
Service endpoints extend the subnet identity to the Azure Storage service without assigning a private IP to the storage account. This allows the administrator to restrict access to the specific Azure subnet while keeping the service reachable through its normal public DNS name. It fits the requirement to avoid DNS changes and private IP creation.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
A site-to-site VPN between the subnet and the storage account.
Why it's wrong here
Storage accounts do not participate in VPN tunnels; VPN connectivity is used between networks, not directly to PaaS endpoints.
When this WOULD be correct
If the question required connecting an on-premises network to an Azure storage account securely over the internet, a site-to-site VPN would be correct. For example: 'An on-premises data center needs to access an Azure storage account securely without using a public endpoint.'
- ✗
A user-defined route that sends storage traffic to the default internet next hop.
Why it's wrong here
Routes do not restrict storage access to a subnet and do not provide the access-control behavior required by the security team.
When this WOULD be correct
If the question required forcing all traffic from the subnet to a storage account through a specific network virtual appliance (NVA) for inspection, a UDR with the NVA as next hop would be correct. For example: 'VMs must access storage via a firewall for logging; configure a route to send storage traffic to the firewall.'
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 service endpoint on the subnet and a storage account network rule allowing that subnet.Correct answer▾
Why this is correct
Service endpoints extend the subnet identity to the Azure Storage service without assigning a private IP to the storage account. This allows the administrator to restrict access to the specific Azure subnet while keeping the service reachable through its normal public DNS name. It fits the requirement to avoid DNS changes and private IP creation.
✗A private endpoint for the storage account and a private DNS zone.Wrong answer — click to see why▾
Why this is wrong here
The question explicitly states the team does not want to create a private IP for the storage account or change DNS records. A private endpoint requires a private IP and a private DNS zone, which violates these constraints.
★ When this WOULD be the correct answer
When the requirement is to ensure the storage account is accessible only from a specific virtual network using a private IP address, and the team is willing to manage private DNS zones or use custom DNS to resolve the storage account's private endpoint.
Why candidates choose this
Candidates may confuse private endpoints with service endpoints, thinking both provide similar subnet-level access, but private endpoints offer more isolation and are often perceived as the 'best practice' for securing PaaS resources.
✗A site-to-site VPN between the subnet and the storage account.Wrong answer — click to see why▾
Why this is wrong here
A site-to-site VPN connects on-premises networks to Azure, not a subnet within Azure. It does not restrict storage account access to a specific subnet without using private IPs or DNS changes.
★ When this WOULD be the correct answer
If the question required connecting an on-premises network to an Azure storage account securely over the internet, a site-to-site VPN would be correct. For example: 'An on-premises data center needs to access an Azure storage account securely without using a public endpoint.'
Why candidates choose this
Candidates may think a VPN provides secure network-level access control, but they overlook that service endpoints or private endpoints are designed for Azure-to-Azure subnet-level restrictions without VPN complexity.
✗A user-defined route that sends storage traffic to the default internet next hop.Wrong answer — click to see why▾
Why this is wrong here
A user-defined route (UDR) sending storage traffic to the default internet next hop does not restrict access to the subnet; it merely directs traffic via the internet, which offers no security boundary. The requirement is to limit storage account access to the subnet, which requires a network rule, not routing.
★ When this WOULD be the correct answer
If the question required forcing all traffic from the subnet to a storage account through a specific network virtual appliance (NVA) for inspection, a UDR with the NVA as next hop would be correct. For example: 'VMs must access storage via a firewall for logging; configure a route to send storage traffic to the firewall.'
Why candidates choose this
Candidates may confuse routing with access control, thinking that directing traffic through a specific path (like the subnet) inherently restricts access, or they may assume a UDR can replace a network rule.
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 both require private IPs and DNS changes, but service endpoints operate at the network layer without altering the storage account's public endpoint.
Detailed technical explanation
How to think about this question
Service endpoints use the Azure backbone network to route traffic from the subnet to the storage account, ensuring traffic never leaves the Microsoft network. The storage account firewall evaluates the source IP of the traffic, which is the subnet's virtual network prefix, not a public IP, because the service endpoint injects the subnet's identity into the packet. This approach is ideal for scenarios where you need to secure PaaS services without the overhead of private endpoints, but it does not provide private IP connectivity or bypass the public endpoint entirely.
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
Quick reference
Common DNS Record Types
| Record | Purpose | Example |
|---|---|---|
| A | IPv4 address mapping | example.com → 93.184.216.34 |
| AAAA | IPv6 address mapping | example.com → 2606:2800::1 |
| CNAME | Alias to another hostname | www → example.com |
| MX | Mail server for domain | example.com → mail.example.com (priority 10) |
| TXT | Text data (SPF, DKIM, verification) | v=spf1 include:_spf.example.com ~all |
| NS | Authoritative name servers | example.com NS ns1.example.com |
| PTR | Reverse DNS (IP → hostname) | 34.216.184.93.in-addr.arpa → example.com |
| SOA | Zone authority record | Primary NS, admin email, serial, TTL defaults |
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: A service endpoint on the subnet and a storage account network rule allowing that subnet. — Option B is correct because a service endpoint extends the subnet's identity to the storage account, allowing the storage firewall to accept traffic from that subnet without assigning a private IP. This meets the security requirement of restricting access to only that subnet while avoiding private IPs 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.
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Last reviewed: Jun 11, 2026
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