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 in Azure cannot accept RDP connections from your office public IP. The subnet NSG already has an inbound deny-all rule at priority 200, and you added an allow rule for TCP 3389 from 198.51.100.25/32 at priority 300. What should you do to allow the connection?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Create or move the allow rule to priority 100 so it is evaluated before the deny rule.
Network Security Group (NSG) rules are evaluated in priority order, with lower numbers having higher precedence. Since the deny-all rule at priority 200 is evaluated before the allow rule at priority 300, the deny rule blocks the RDP traffic. To allow the connection, the allow rule must be created or moved to a priority lower than 200 (e.g., 100) so it is evaluated first, permitting traffic from 198.51.100.25/32 on TCP 3389 before the deny rule is reached.
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 source to Internet so the allow rule matches more traffic.
Why it's wrong here
This broadens access unnecessarily and still loses to the lower-priority deny rule.
✓
Create or move the allow rule to priority 100 so it is evaluated before the deny rule.
Why this is correct
NSG rules are processed in ascending priority order, so the allow must come before the deny-all rule.
Related concept
Read the scenario before looking for a memorised answer.
✗
Change the protocol from TCP to Any to bypass the deny rule.
Why it's wrong here
The deny-all rule still matches first by priority, regardless of protocol selection.
✗
Assign a public IP directly to the VM to override the subnet NSG behavior.
Why it's wrong here
A public IP changes reachability, but it does not override NSG rule evaluation order.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates mistakenly think adding a more specific allow rule at a higher priority number will override a broader deny rule, not realizing that NSG priority order (lower number = higher priority) determines which rule is evaluated first.
Detailed technical explanation
How to think about this question
NSG rules are processed in ascending priority order until a matching rule is found; once a match occurs, no further rules are evaluated. This means a deny-all rule at a lower priority number (e.g., 200) will block traffic even if a higher-numbered allow rule (e.g., 300) exists. In real-world scenarios, administrators often reserve priority ranges (e.g., 100-199) for explicit allow rules and use higher ranges for catch-all denies to ensure desired traffic is permitted first.
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
An e-commerce site experiences heavy traffic on Black Friday and near-zero traffic during off-peak weeks. Rather than provisioning permanent large VMs, the team uses auto-scaling groups that add capacity automatically under load and reduce it overnight. Questions like this test whether you understand elasticity, availability zones, and cloud compute scaling patterns.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this AZ-104 question in full detail.
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 or move the allow rule to priority 100 so it is evaluated before the deny rule. — Network Security Group (NSG) rules are evaluated in priority order, with lower numbers having higher precedence. Since the deny-all rule at priority 200 is evaluated before the allow rule at priority 300, the deny rule blocks the RDP traffic. To allow the connection, the allow rule must be created or moved to a priority lower than 200 (e.g., 100) so it is evaluated first, permitting traffic from 198.51.100.25/32 on TCP 3389 before the deny rule is reached.
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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Question Discussion
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