- A
Change the deny rule to protocol Any so the allow rule will be evaluated first.
Why wrong: Changing the protocol does not alter priority order, so the deny rule would still win if it remains higher precedence.
- B
Add a UDR that sends TCP 3389 traffic to the VM subnet.
Why wrong: Route tables influence path selection, not NSG rule evaluation, so they will not fix an inbound deny decision.
- C
Move the allow rule to a lower priority number than 100.
NSG rules are evaluated in priority order, where the lowest number wins. Because the deny rule at priority 100 is matched before the allow rule at 200, the connection is blocked even for the admin subnet. Moving the allow rule to a priority such as 90 makes it the first matching rule, while the deny rule still blocks all other sources afterward.
- D
Associate an application security group with the VM and keep the existing priorities.
Why wrong: Application Security Groups can simplify rule maintenance, but they do not override an earlier deny rule with a higher priority.
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 VM has an NSG with these inbound rules: Deny-RDP at priority 100 for TCP 3389 from Any, and Allow-RDP-Admins at priority 200 for TCP 3389 from 10.8.1.0/24. Admins from 10.8.1.0/24 still cannot connect by RDP. What change fixes access while keeping all other sources blocked?
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 100.
C is correct because NSG rules are evaluated in priority order, with lower numbers evaluated first. The Deny-RDP rule at priority 100 is evaluated before the Allow-RDP-Admins rule at priority 200, so traffic from 10.8.1.0/24 is denied before the allow rule is reached. Moving the allow rule to a priority lower than 100 (e.g., 90) ensures it is evaluated first, allowing the admin traffic while the deny rule still blocks all other sources.
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.
- ✗
Change the deny rule to protocol Any so the allow rule will be evaluated first.
Why it's wrong here
Changing the protocol does not alter priority order, so the deny rule would still win if it remains higher precedence.
- ✗
Add a UDR that sends TCP 3389 traffic to the VM subnet.
Why it's wrong here
Route tables influence path selection, not NSG rule evaluation, so they will not fix an inbound deny decision.
- ✓
Move the allow rule to a lower priority number than 100.
Why this is correct
NSG rules are evaluated in priority order, where the lowest number wins. Because the deny rule at priority 100 is matched before the allow rule at 200, the connection is blocked even for the admin subnet. Moving the allow rule to a priority such as 90 makes it the first matching rule, while the deny rule still blocks all other sources afterward.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Associate an application security group with the VM and keep the existing priorities.
Why it's wrong here
Application Security Groups can simplify rule maintenance, but they do not override an earlier deny rule with a higher priority.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often think changing the protocol or adding a route or ASG can override the priority-based evaluation order, but the core issue is simply that the deny rule has a lower priority number and is evaluated first.
Detailed technical explanation
How to think about this question
Azure NSGs process rules in ascending priority order, and once a rule matches, no further rules are evaluated for that packet. This means a deny rule at a lower priority number will always block traffic before a higher-priority allow rule, even if the allow rule is more specific. In real-world scenarios, this is a common misconfiguration when administrators add a broad deny rule for security but forget to place more specific allow rules at a lower priority number, leading to unintended blocks.
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 company's IT admin needs to give a contractor read-only access to production logs without sharing account credentials. Using role-based access control (RBAC) and temporary scoped permissions — not a permanent shared password — is the correct pattern. Questions like this test whether you can apply least-privilege access across cloud identity services.
What to study next
Got this wrong? Here's your next step.
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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 100. — C is correct because NSG rules are evaluated in priority order, with lower numbers evaluated first. The Deny-RDP rule at priority 100 is evaluated before the Allow-RDP-Admins rule at priority 200, so traffic from 10.8.1.0/24 is denied before the allow rule is reached. Moving the allow rule to a priority lower than 100 (e.g., 90) ensures it is evaluated first, allowing the admin traffic while the deny rule still blocks all other sources.
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
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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