- A
Move the allow HTTPS rule to a lower priority number such as 100 so it is evaluated before the deny rule.
NSG rules are processed in order of priority, and the lowest number wins. Because the deny rule at 200 is evaluated before the allow rule at 300, HTTPS is blocked. Moving the allow rule to a lower priority number lets it match first while keeping the deny rule for all other inbound traffic.
- B
Create the same allow rule on the NIC-level NSG at priority 300 and leave the subnet NSG unchanged.
Why wrong: A higher-priority deny on the subnet NSG still blocks the traffic. Adding a NIC rule with a weaker priority does not override the subnet-level deny.
- C
Change the deny rule to protocol Any and keep the same priority so Azure evaluates the allow rule first.
Why wrong: Changing the protocol does not affect evaluation order. The deny rule would still win because it has the lower priority number.
- D
Add a route table entry for TCP 443 traffic so Azure sends it directly to the VM.
Why wrong: Route tables control next hop selection, not security filtering. A route does not bypass an NSG deny rule on the subnet.
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. A key principle to apply: nSG rules are processed by priority number, from lowest to highest.. 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 an NSG with these inbound rules: priority 200 DenyAllInbound and priority 300 AllowHTTPSFromInternet. A VM in the subnet is still unreachable on TCP 443 from the internet. What should you do to make HTTPS work while keeping the deny rule in place?
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 HTTPS rule to a lower priority number such as 100 so it is evaluated before the deny rule.
Option A is correct because NSG rules are evaluated in priority order, with lower numbers evaluated first. Moving the allow HTTPS rule to priority 100 ensures it is processed before the DenyAllInbound rule at priority 200, allowing TCP 443 traffic from the internet while the deny rule remains in place for all other inbound traffic.
Key principle: NSG rules are processed by priority number, from lowest to highest.
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 HTTPS rule to a lower priority number such as 100 so it is evaluated before the deny rule.
Why this is correct
NSG rules are processed in order of priority, and the lowest number wins. Because the deny rule at 200 is evaluated before the allow rule at 300, HTTPS is blocked. Moving the allow rule to a lower priority number lets it match first while keeping the deny rule for all other inbound traffic.
Related concept
NSG rules are processed by priority number, from lowest to highest.
- ✗
Create the same allow rule on the NIC-level NSG at priority 300 and leave the subnet NSG unchanged.
Why it's wrong here
A higher-priority deny on the subnet NSG still blocks the traffic. Adding a NIC rule with a weaker priority does not override the subnet-level deny.
- ✗
Change the deny rule to protocol Any and keep the same priority so Azure evaluates the allow rule first.
Why it's wrong here
Changing the protocol does not affect evaluation order. The deny rule would still win because it has the lower priority number.
- ✗
Add a route table entry for TCP 443 traffic so Azure sends it directly to the VM.
Why it's wrong here
Route tables control next hop selection, not security filtering. A route does not bypass an NSG deny rule on the subnet.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often think NSG rules are evaluated based on specificity (e.g., more specific rules override broader ones) rather than strictly by priority number, leading them to believe a higher-priority allow rule can override a lower-priority deny rule.
Detailed technical explanation
How to think about this question
Azure NSGs use a numeric priority system where lower numbers are evaluated first; rules are processed in ascending order until a match is found, and then no further rules are evaluated. This is similar to ACLs in traditional networking but with an implicit deny at the end. In a real-world scenario, if you need to allow specific ports while maintaining a broad deny, you must ensure the allow rule has a lower priority number than the deny rule, or the deny rule will block the traffic before the allow rule is checked.
KKey Concepts to Remember
- NSG rules are processed by priority number, from lowest to highest.
- The first matching NSG rule (allow or deny) is applied, and evaluation stops.
- Subnet-level NSG rules are processed before NIC-level NSG rules.
- Lower priority numbers indicate higher precedence in NSG rule evaluation.
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
NSG rules are processed by priority number, from lowest to highest.
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.
What to study next
Got this wrong? Here's your next step.
Review nSG rules are processed by priority number, from lowest to highest., then practise related AZ-104 questions on the same topic to reinforce the concept.
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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 — NSG rules are processed by priority number, from lowest to highest..
What is the correct answer to this question?
The correct answer is: Move the allow HTTPS rule to a lower priority number such as 100 so it is evaluated before the deny rule. — Option A is correct because NSG rules are evaluated in priority order, with lower numbers evaluated first. Moving the allow HTTPS rule to priority 100 ensures it is processed before the DenyAllInbound rule at priority 200, allowing TCP 443 traffic from the internet while the deny rule remains in place for all other inbound traffic.
What should I do if I get this AZ-104 question wrong?
Review nSG rules are processed by priority number, from lowest to highest., then practise related AZ-104 questions on the same topic to reinforce the concept.
What is the key concept behind this question?
NSG rules are processed by priority number, from lowest to highest.
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Last reviewed: Jun 11, 2026
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