- A
Move the allow rule to a higher priority number than 200.
Why wrong: A higher priority number makes the allow rule evaluate later, so the deny rule would still win.
- B
Move the allow rule to a lower priority number than 200.
NSG rules are processed from lowest number to highest number, so the allow must be evaluated first.
- C
Ensure the web NICs are added to ASG-Web and the API NICs are added to ASG-Api.
ASG-based rules only match when the network interfaces are members of the referenced application groups.
- D
Change the rule protocol from TCP to Any.
Why wrong: Protocol flexibility will not help if the deny rule is still evaluated before the allow rule.
- E
Attach a route table to the API subnet to override the deny behavior.
Why wrong: Route tables affect next-hop selection, not security filtering performed by the NSG.
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 web tier and API tier run in different subnets. The API subnet NSG currently has Deny-8443 from Any at priority 200 and Allow-8443-WebToApi from ASG-Web to ASG-Api at priority 300. Web requests on TCP 8443 are failing. Which two changes should the administrator make? Select two.
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
Move the allow rule to a lower priority number than 200.
B is correct because NSG rules are evaluated in priority order, with lower numbers having higher priority. The Deny-8443 rule at priority 200 is evaluated before the Allow-8443-WebToApi rule at priority 300, so the deny rule blocks the traffic. Moving the allow rule to a lower priority number (e.g., 100) ensures it is evaluated first, allowing the traffic. C is correct because the allow rule uses application security groups (ASGs); if the web and API NICs are not assigned to the respective ASGs, the rule will not match any traffic, effectively making it a no-op.
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.
- ✗
Move the allow rule to a higher priority number than 200.
Why it's wrong here
A higher priority number makes the allow rule evaluate later, so the deny rule would still win.
- ✓
Move the allow rule to a lower priority number than 200.
Why this is correct
NSG rules are processed from lowest number to highest number, so the allow must be evaluated first.
Related concept
Read the scenario before looking for a memorised answer.
- ✓
Ensure the web NICs are added to ASG-Web and the API NICs are added to ASG-Api.
Why this is correct
ASG-based rules only match when the network interfaces are members of the referenced application groups.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Change the rule protocol from TCP to Any.
Why it's wrong here
Protocol flexibility will not help if the deny rule is still evaluated before the allow rule.
- ✗
Attach a route table to the API subnet to override the deny behavior.
Why it's wrong here
Route tables affect next-hop selection, not security filtering performed by the NSG.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often forget that NSG rules are evaluated in priority order (lower number = higher priority) and that application security groups require explicit NIC assignment—they may assume the ASG rule works automatically or that changing the protocol or adding a route table can bypass a deny rule.
Detailed technical explanation
How to think about this question
Azure NSGs process rules in ascending priority order (lower number = higher priority) and stop at the first match. Application security groups (ASGs) allow grouping of VM NICs by logical role; the ASG must be explicitly assigned to each NIC via the network interface configuration. In this scenario, even with correct priority, if the NICs are not in the ASGs, the allow rule never matches, and the implicit deny (or explicit deny) blocks the traffic. A common real-world scenario is deploying multi-tier apps where ASGs simplify rule management but require careful NIC assignment.
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
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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: Move the allow rule to a lower priority number than 200. — B is correct because NSG rules are evaluated in priority order, with lower numbers having higher priority. The Deny-8443 rule at priority 200 is evaluated before the Allow-8443-WebToApi rule at priority 300, so the deny rule blocks the traffic. Moving the allow rule to a lower priority number (e.g., 100) ensures it is evaluated first, allowing the traffic. C is correct because the allow rule uses application security groups (ASGs); if the web and API NICs are not assigned to the respective ASGs, the rule will not match any traffic, effectively making it a no-op.
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
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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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