- A
Create a second private endpoint in VNet-B for the same storage account.
Why wrong: A second private endpoint is not required just to fix name resolution in the peered network. The existing endpoint can be shared through DNS if the zone is linked correctly.
- B
Enable a service endpoint on VNet-B and remove the private endpoint.
Why wrong: A service endpoint does not create a private IP address for the service. Removing the private endpoint would change the connectivity model and would not solve the current DNS issue.
- C
Add a user-defined route in VNet-B that points the storage FQDN to the private IP.
Why wrong: User-defined routes work with IP prefixes, not with DNS names. A route table cannot rewrite the result of name resolution.
- D
Create a virtual network link from the private DNS zone to VNet-B.
Private endpoint access depends on correct DNS resolution to the private endpoint IP. Because the private DNS zone is linked only to VNet-A, VNet-B does not receive the private name mapping. Linking the zone to VNet-B allows resources in the peered VNet to resolve the blob endpoint name to the private IP as intended.
AZ-104 Implement and Manage Virtual Networking Practice Question
This AZ-104 practice question tests your understanding of implement and manage virtual networking. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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 a blob private endpoint in VNet-A. A VM in peered VNet-B can reach the storage account by private IP, but name resolution for the storage account still returns the public IP address. The private DNS zone privatelink.blob.core.windows.net is already linked only to VNet-A. What should the administrator do next?
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 virtual network link from the private DNS zone to VNet-B.
The private DNS zone `privatelink.blob.core.windows.net` is linked only to VNet-A, so VMs in VNet-B cannot resolve the storage account's FQDN to its private IP. By creating a virtual network link from the private DNS zone to VNet-B, the zone's records become available for resolution in VNet-B, allowing the VM to resolve the storage FQDN to the private endpoint's IP address instead of the public IP.
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 second private endpoint in VNet-B for the same storage account.
Why it's wrong here
A second private endpoint is not required just to fix name resolution in the peered network. The existing endpoint can be shared through DNS if the zone is linked correctly.
When this WOULD be correct
This option would be correct if the storage account needed to be accessed from VNet-B with a separate private IP (e.g., for isolation or compliance) and the private DNS zone was already linked to both VNets. For example, if each VNet required its own private endpoint for the same storage account to enforce network policies.
- ✗
Enable a service endpoint on VNet-B and remove the private endpoint.
Why it's wrong here
A service endpoint does not create a private IP address for the service. Removing the private endpoint would change the connectivity model and would not solve the current DNS issue.
When this WOULD be correct
If the requirement was to access the storage account from VNet-B using the public endpoint but with source IP restricted to VNet-B's subnet, and private endpoint was not needed, then enabling a service endpoint on VNet-B and removing the private endpoint would be correct.
- ✗
Add a user-defined route in VNet-B that points the storage FQDN to the private IP.
Why it's wrong here
User-defined routes work with IP prefixes, not with DNS names. A route table cannot rewrite the result of name resolution.
When this WOULD be correct
A UDR would be correct if the VM could already resolve the storage account to the private IP (e.g., via a custom DNS server), but traffic was still going over the internet due to asymmetric routing or missing effective routes. The UDR would force traffic to the private endpoint IP.
- ✓
Create a virtual network link from the private DNS zone to VNet-B.
Why this is correct
Private endpoint access depends on correct DNS resolution to the private endpoint IP. Because the private DNS zone is linked only to VNet-A, VNet-B does not receive the private name mapping. Linking the zone to VNet-B allows resources in the peered VNet to resolve the blob endpoint name to the private IP as intended.
Related concept
Read the scenario before looking for a memorised answer.
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.
✓Create a virtual network link from the private DNS zone to VNet-B.Correct answer▾
Why this is correct
Private endpoint access depends on correct DNS resolution to the private endpoint IP. Because the private DNS zone is linked only to VNet-A, VNet-B does not receive the private name mapping. Linking the zone to VNet-B allows resources in the peered VNet to resolve the blob endpoint name to the private IP as intended.
✗Create a second private endpoint in VNet-B for the same storage account.Wrong answer — click to see why▾
Why this is wrong here
Creating a second private endpoint in VNet-B for the same storage account is unnecessary and violates the principle of using a single private endpoint with DNS resolution. The issue is DNS resolution, not connectivity; the VM can already reach the storage account via private IP, but name resolution fails because the private DNS zone is not linked to VNet-B.
★ When this WOULD be the correct answer
This option would be correct if the storage account needed to be accessed from VNet-B with a separate private IP (e.g., for isolation or compliance) and the private DNS zone was already linked to both VNets. For example, if each VNet required its own private endpoint for the same storage account to enforce network policies.
Why candidates choose this
Candidates may think that adding a private endpoint in VNet-B will automatically resolve DNS, but they overlook that DNS resolution requires the private DNS zone to be linked to the VNet where the client resides.
✗Enable a service endpoint on VNet-B and remove the private endpoint.Wrong answer — click to see why▾
Why this is wrong here
Enabling a service endpoint on VNet-B and removing the private endpoint would break private connectivity for VNet-A and does not resolve DNS resolution; service endpoints do not provide private DNS integration.
★ When this WOULD be the correct answer
If the requirement was to access the storage account from VNet-B using the public endpoint but with source IP restricted to VNet-B's subnet, and private endpoint was not needed, then enabling a service endpoint on VNet-B and removing the private endpoint would be correct.
Why candidates choose this
Candidates may confuse service endpoints with private endpoints, thinking both provide similar private connectivity, and assume removing the private endpoint simplifies the setup while still allowing access via service endpoint.
✗Add a user-defined route in VNet-B that points the storage FQDN to the private IP.Wrong answer — click to see why▾
Why this is wrong here
User-defined routes (UDRs) cannot override DNS resolution; they only control network traffic flow. The issue is name resolution returning the public IP, not routing, so a UDR won't fix the DNS query.
★ When this WOULD be the correct answer
A UDR would be correct if the VM could already resolve the storage account to the private IP (e.g., via a custom DNS server), but traffic was still going over the internet due to asymmetric routing or missing effective routes. The UDR would force traffic to the private endpoint IP.
Why candidates choose this
Candidates may confuse name resolution with network routing, thinking that a route can redirect DNS queries or that controlling traffic flow will automatically fix DNS resolution.
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 assume private endpoint connectivity alone ensures name resolution, but they forget that DNS resolution requires the private DNS zone to be linked to the peered VNet, not just the VNet where the endpoint resides.
Detailed technical explanation
How to think about this question
Azure Private Endpoints use a private DNS zone (e.g., `privatelink.blob.core.windows.net`) to map the storage account's FQDN to its private IP. When a virtual network link is created, the zone's records are merged into the VNet's DNS resolution chain via Azure DNS, enabling automatic resolution. Without this link, VMs in peered VNets fall back to public DNS, which returns the public IP, even though the private IP is reachable via the peering connection.
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: Create a virtual network link from the private DNS zone to VNet-B. — The private DNS zone `privatelink.blob.core.windows.net` is linked only to VNet-A, so VMs in VNet-B cannot resolve the storage account's FQDN to its private IP. By creating a virtual network link from the private DNS zone to VNet-B, the zone's records become available for resolution in VNet-B, allowing the VM to resolve the storage FQDN to the private endpoint's IP address instead of the public IP.
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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