- A
Delete the deny rule so the allow rule can be evaluated.
Why wrong: Removing the deny rule is unnecessary if the allow rule is given a higher priority.
- B
Change the allow rule to a higher priority than 200, such as 100.
NSGs process the lowest priority number first. Moving the allow rule above the deny rule permits the traffic.
- C
Change the destination from ASG-Api to the entire subnet address range.
Why wrong: The destination address form is not the issue; the deny rule still wins because of priority.
- D
Change the protocol from TCP to Any so the rule matches more traffic.
Why wrong: The rule already matches TCP 443 traffic; protocol widening does not resolve a higher-priority deny.
Question 880 of 1,170
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.
An application subnet has an NSG outbound rule Deny-HTTPS at priority 200 for TCP 443 to Any. A second outbound rule Allow-HTTPS-API at priority 300 permits TCP 443 from ASG-Web to ASG-Api. Web servers can reach other ports but not the API. What change should the administrator make?
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
✓
Change the allow rule to a higher priority than 200, such as 100.
Option B is correct because NSG rules are evaluated in priority order, with lower numbers having higher precedence. The Deny-HTTPS rule at priority 200 blocks all outbound TCP 443 traffic, including traffic from ASG-Web to ASG-Api. To allow the specific traffic, the Allow-HTTPS-API rule must have a lower priority number (e.g., 100) so it is evaluated before the deny rule, permitting the desired traffic while the deny rule still blocks other outbound HTTPS traffic.
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.
- ✗
Delete the deny rule so the allow rule can be evaluated.
Why it's wrong here
Removing the deny rule is unnecessary if the allow rule is given a higher priority.
When this WOULD be correct
If the question stated that the deny rule was unnecessary and could be removed without affecting security requirements, and the goal was to allow HTTPS traffic to the API, then deleting the deny rule would be correct. For example, if the deny rule was mistakenly added and the allow rule was intended to be the only rule governing HTTPS traffic.
- ✓
Change the allow rule to a higher priority than 200, such as 100.
Why this is correct
NSGs process the lowest priority number first. Moving the allow rule above the deny rule permits the traffic.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Change the destination from ASG-Api to the entire subnet address range.
Why it's wrong here
The destination address form is not the issue; the deny rule still wins because of priority.
When this WOULD be correct
If the NSG had no deny rule and the allow rule was too restrictive (e.g., only allowing traffic to a specific IP that is not the API server), then expanding the destination to the entire subnet address range could permit the required traffic.
- ✗
Change the protocol from TCP to Any so the rule matches more traffic.
Why it's wrong here
The rule already matches TCP 443 traffic; protocol widening does not resolve a higher-priority deny.
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.
✓Change the allow rule to a higher priority than 200, such as 100.Correct answer▾
Why this is correct
NSGs process the lowest priority number first. Moving the allow rule above the deny rule permits the traffic.
✗Delete the deny rule so the allow rule can be evaluated.Wrong answer — click to see why▾
Why this is wrong here
In Azure, NSG rules are evaluated in priority order (lowest number first). The deny rule at priority 200 is evaluated before the allow rule at priority 300, so deleting the deny rule would allow the allow rule to work, but the question asks for a change to fix the issue without deleting the deny rule. The correct fix is to increase the priority of the allow rule.
★ When this WOULD be the correct answer
If the question stated that the deny rule was unnecessary and could be removed without affecting security requirements, and the goal was to allow HTTPS traffic to the API, then deleting the deny rule would be correct. For example, if the deny rule was mistakenly added and the allow rule was intended to be the only rule governing HTTPS traffic.
Why candidates choose this
Candidates may think that removing a blocking rule is the simplest solution, not realizing that NSG rules are evaluated in priority order and that the deny rule can coexist with a higher-priority allow rule. They might also overlook that the question implies the deny rule should remain for other traffic.
✗Change the destination from ASG-Api to the entire subnet address range.Wrong answer — click to see why▾
Why this is wrong here
The allow rule already permits traffic to ASG-Api, but the deny rule at priority 200 blocks it before the allow rule at priority 300 is evaluated. Changing the destination to the entire subnet would not resolve the priority issue; the deny rule would still block traffic to the subnet.
★ When this WOULD be the correct answer
If the NSG had no deny rule and the allow rule was too restrictive (e.g., only allowing traffic to a specific IP that is not the API server), then expanding the destination to the entire subnet address range could permit the required traffic.
Why candidates choose this
Candidates may think that the allow rule's destination is too narrow and that widening it to the subnet will override the deny rule, misunderstanding that NSG rules are evaluated in priority order and a higher-priority deny always blocks matching traffic.
✗Change the protocol from TCP to Any so the rule matches more traffic.Wrong answer — click to see why▾
Why this is wrong here
Changing the protocol to Any would not resolve the issue because the Deny-HTTPS rule at priority 200 still blocks TCP 443 traffic regardless of protocol scope. The allow rule at lower priority (300) is never evaluated due to the higher-priority deny.
★ When this WOULD be the correct answer
In a scenario where an NSG rule is too restrictive on protocol (e.g., only allowing TCP but the application requires UDP), changing the protocol to Any would permit all traffic types, potentially fixing connectivity issues caused by protocol mismatch.
Why candidates choose this
Candidates may think that broadening the protocol scope will make the allow rule more effective, overlooking that priority order determines rule evaluation and a higher-priority deny still blocks the traffic.
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 often assume more specific rules (like those using application security groups) are evaluated before general deny rules, but in Azure NSGs, priority numbers alone determine evaluation order, not specificity.
Detailed technical explanation
How to think about this question
Azure Network Security Groups (NSGs) process rules in ascending order of priority (lower number = higher priority), and once a rule matches, no further rules are evaluated. This means a deny rule with priority 200 will always block traffic before an allow rule with priority 300 can be considered, regardless of the rule's specificity. In real-world scenarios, this priority-based evaluation is critical for implementing 'deny all, allow specific' patterns, where high-priority deny rules must be carefully placed above lower-priority allow rules to avoid unintended blocking.
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 healthcare organisation deploys an application with a public-facing web tier and a private database tier. The database subnet has no public IP and only accepts connections from the web tier's security group. Questions like this test whether you can design cloud network isolation using VNets/VPCs, subnets, and security group rules.
Visual reference
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: Change the allow rule to a higher priority than 200, such as 100. — Option B is correct because NSG rules are evaluated in priority order, with lower numbers having higher precedence. The Deny-HTTPS rule at priority 200 blocks all outbound TCP 443 traffic, including traffic from ASG-Web to ASG-Api. To allow the specific traffic, the Allow-HTTPS-API rule must have a lower priority number (e.g., 100) so it is evaluated before the deny rule, permitting the desired traffic while the deny rule still blocks other outbound HTTPS traffic.
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
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