- A
Azure always ignores user-defined routes for storage traffic.
Why wrong: Azure does not universally ignore user-defined routes for storage; route selection depends on prefixes and the destination path.
- B
The storage account traffic is using a more specific route than the 0.0.0.0/0 route.
Route selection prefers the most specific matching prefix. If a more specific route exists for the storage destination, it can win over the default route to the NVA. This is why forced tunneling designs must be checked against specific system or learned routes. Understanding route precedence is essential when traffic does not follow the default next hop that appears to be in place.
- C
NSG outbound rules override user-defined routes in Azure.
Why wrong: NSGs filter traffic but do not determine next hop, so they do not override routing decisions.
- D
The subnet needs a public IP address assigned to each VM for the route to take effect.
Why wrong: Public IPs are not required for UDRs. Routing applies to private IP traffic inside Azure networking as well.
Quick Answer
The answer is that Azure’s longest prefix match routing causes a more specific platform route for Azure Storage to override your user-defined route. Even though you created a 0.0.0.0/0 route pointing to a network virtual appliance, Azure automatically injects platform routes for its own services, including specific public IP ranges for Azure Storage. These built-in routes have a smaller prefix (e.g., a /16 or /20 range) than your /0 default, so they always win the routing decision—your UDR only applies when no more specific route exists. On the AZ-104 exam, this tests your understanding of effective routes and the hierarchy: platform routes for Azure services take precedence over user-defined default routes, a common trap where administrators assume all traffic follows the 0.0.0.0/0 rule. Remember the memory tip: “Default is last, specific beats broad—Azure’s own routes always get the nod.”
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.
A subnet has a user-defined route for 0.0.0.0/0 that sends traffic to a network virtual appliance at 10.10.1.4. The VM in the subnet still reaches an Azure Storage account using the public endpoint, but the administrator expected all outbound traffic to go through the NVA. What is the most likely reason?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue:
"most likely"Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
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
The storage account traffic is using a more specific route than the 0.0.0.0/0 route.
The most likely reason is that the storage account traffic is using a more specific route than the 0.0.0.0/0 route. Azure uses longest prefix match routing, so a route with a smaller prefix (e.g., a specific public IP range for Azure Storage) will take precedence over the default route. The 0.0.0.0/0 route only applies when no more specific route exists, and Azure automatically adds platform routes for Azure services like Storage, which can override user-defined routes.
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.
- ✗
Azure always ignores user-defined routes for storage traffic.
Why it's wrong here
Azure does not universally ignore user-defined routes for storage; route selection depends on prefixes and the destination path.
- ✓
The storage account traffic is using a more specific route than the 0.0.0.0/0 route.
Why this is correct
Route selection prefers the most specific matching prefix. If a more specific route exists for the storage destination, it can win over the default route to the NVA. This is why forced tunneling designs must be checked against specific system or learned routes. Understanding route precedence is essential when traffic does not follow the default next hop that appears to be in place.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
NSG outbound rules override user-defined routes in Azure.
Why it's wrong here
NSGs filter traffic but do not determine next hop, so they do not override routing decisions.
- ✗
The subnet needs a public IP address assigned to each VM for the route to take effect.
Why it's wrong here
Public IPs are not required for UDRs. Routing applies to private IP traffic inside Azure networking as well.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often assume a default route (0.0.0.0/0) will catch all outbound traffic, forgetting that Azure's platform routes for Azure services (like Storage) can be more specific and take precedence over user-defined routes.
Detailed technical explanation
How to think about this question
Under the hood, Azure uses a routing table with a longest prefix match algorithm, where more specific prefixes (e.g., /32 or /24) take precedence over less specific ones (e.g., /0). For Azure Storage, the platform may inject a route for the storage service's public IP ranges (via service tags) that is more specific than 0.0.0.0/0, causing traffic to bypass the NVA. In a real-world scenario, this can be resolved by using a private endpoint for the storage account, which creates a more specific /32 route for that resource, ensuring traffic goes through the NVA.
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: The storage account traffic is using a more specific route than the 0.0.0.0/0 route. — The most likely reason is that the storage account traffic is using a more specific route than the 0.0.0.0/0 route. Azure uses longest prefix match routing, so a route with a smaller prefix (e.g., a specific public IP range for Azure Storage) will take precedence over the default route. The 0.0.0.0/0 route only applies when no more specific route exists, and Azure automatically adds platform routes for Azure services like Storage, which can override user-defined routes.
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.
Are there clue words in this question I should notice?
Yes — watch for: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
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 →
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.
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