- A
The request is allowed because the more specific source range matches first.
Why wrong: A more specific source range does not matter when an earlier rule with a lower priority number also matches the traffic.
- B
The request is denied because the priority 100 deny rule matches before the allow rule.
Azure NSGs evaluate rules by priority, and the lowest number is processed first. Both rules match this HTTPS traffic, but the deny rule at priority 100 is considered before the allow rule at priority 200. Because the first match wins, the packet is blocked even though the source is in the allowed range.
- C
The request is denied only if the VM has no public IP address.
Why wrong: Public IP assignment does not change how the NSG evaluates matching rules. The decision is made from the rule set and packet attributes, not from the presence of a public IP.
- D
The request is allowed because default NSG rules always override custom rules.
Why wrong: Default rules are evaluated after custom rules only when no custom rule matches. They do not override a matching custom 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. 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 NSG is associated with a subnet. It contains these inbound rules: - Priority 100: Deny TCP 443 from Internet to Any - Priority 200: Allow TCP 443 from 203.0.113.0/24 to Any A tester at 203.0.113.10 browses to the VM's HTTPS endpoint in that subnet. What happens?
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
The request is denied because the priority 100 deny rule matches before the allow rule.
The correct answer is B. Network Security Group (NSG) rules are evaluated in priority order, from lowest to highest numeric value. The priority 100 rule explicitly denies TCP 443 from the Internet (which includes the 203.0.113.0/24 range), and it is evaluated before the priority 200 allow rule. Since the deny rule matches first, the traffic is blocked regardless of the more specific source IP in the allow rule.
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.
- ✗
The request is allowed because the more specific source range matches first.
Why it's wrong here
A more specific source range does not matter when an earlier rule with a lower priority number also matches the traffic.
- ✓
The request is denied because the priority 100 deny rule matches before the allow rule.
Why this is correct
Azure NSGs evaluate rules by priority, and the lowest number is processed first. Both rules match this HTTPS traffic, but the deny rule at priority 100 is considered before the allow rule at priority 200. Because the first match wins, the packet is blocked even though the source is in the allowed range.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
The request is denied only if the VM has no public IP address.
Why it's wrong here
Public IP assignment does not change how the NSG evaluates matching rules. The decision is made from the rule set and packet attributes, not from the presence of a public IP.
- ✗
The request is allowed because default NSG rules always override custom rules.
Why it's wrong here
Default rules are evaluated after custom rules only when no custom rule matches. They do not override a matching custom deny rule with a higher priority.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates mistakenly believe NSG rules are evaluated based on the specificity of the source or destination (like a firewall with longest-prefix matching), but Azure NSGs strictly use priority-based evaluation where lower numeric priority wins.
Detailed technical explanation
How to think about this question
Under the hood, Azure NSGs use a stateful packet inspection model where inbound rules are evaluated in ascending priority order until a match is found; once a deny rule matches, no further rules are processed. A common real-world scenario is accidentally blocking management traffic (like RDP or HTTPS) by placing a broad deny rule at a lower priority than a specific allow rule, which can lead to loss of connectivity to critical VMs. Note that the 'Internet' service tag in the deny rule includes all public IP ranges, including the 203.0.113.0/24 range, so the deny rule explicitly covers the tester's source.
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: The request is denied because the priority 100 deny rule matches before the allow rule. — The correct answer is B. Network Security Group (NSG) rules are evaluated in priority order, from lowest to highest numeric value. The priority 100 rule explicitly denies TCP 443 from the Internet (which includes the 203.0.113.0/24 range), and it is evaluated before the priority 200 allow rule. Since the deny rule matches first, the traffic is blocked regardless of the more specific source IP in the allow rule.
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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