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.
Exhibit
Inbound NSG rules on subnet AppSubnet:
1. Priority 100: Deny-HTTPS, Source=Any, Destination=Any, Port=443, Action=Deny
2. Priority 200: Allow-HTTPS-Admins, Source=10.10.1.0/24, Destination=Any, Port=443, Action=Allow
Observed result: Admins from 10.10.1.25 cannot open the site on TCP 443.
Based on the exhibit, administrators can reach a web server from the approved subnet, but connections still fail. What is the most likely reason?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "most likely"
Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
Inbound NSG rules on subnet AppSubnet:
1. Priority 100: Deny-HTTPS, Source=Any, Destination=Any, Port=443, Action=Deny
2. Priority 200: Allow-HTTPS-Admins, Source=10.10.1.0/24, Destination=Any, Port=443, Action=Allow
Observed result: Admins from 10.10.1.25 cannot open the site on TCP 443.
A
The allow rule is blocked because inbound rules are evaluated from highest priority number to lowest.
Why wrong: NSG rules are evaluated from the lowest priority number to the highest, so this rule order is not the issue.
B
The deny rule has a higher priority and matches the traffic before the allow rule.
Azure NSG evaluation uses the lowest priority number first. In the exhibit, the deny rule at priority 100 matches TCP 443 from Any, so it blocks the traffic before the later allow rule at priority 200 is considered. To fix the issue, the allow rule must be placed above the deny rule or the deny rule must be narrowed.
C
The destination port must be changed to 80 because NSGs cannot allow TCP 443.
Why wrong: NSGs fully support TCP 443, and HTTPS traffic can be allowed when the rule order and match criteria are correct.
D
The subnet requires a route table before HTTPS can be permitted.
Why wrong: Route tables affect next-hop selection, not whether an NSG allows or denies a packet on a port.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The deny rule has a higher priority and matches the traffic before the allow rule.
Network Security Groups (NSGs) evaluate rules in order of priority, where a lower priority number (e.g., 100) is evaluated before a higher number (e.g., 200). If a deny rule with a higher priority (lower number) matches the traffic before the allow rule, the traffic is blocked. In this scenario, the deny rule (priority 100) matches the source subnet and destination port 443 before the allow rule (priority 200) can permit it, causing connections to fail.
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 allow rule is blocked because inbound rules are evaluated from highest priority number to lowest.
Why it's wrong here
NSG rules are evaluated from the lowest priority number to the highest, so this rule order is not the issue.
✓
The deny rule has a higher priority and matches the traffic before the allow rule.
Why this is correct
Azure NSG evaluation uses the lowest priority number first. In the exhibit, the deny rule at priority 100 matches TCP 443 from Any, so it blocks the traffic before the later allow rule at priority 200 is considered. To fix the issue, the allow rule must be placed above the deny rule or the deny rule must be narrowed.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
The destination port must be changed to 80 because NSGs cannot allow TCP 443.
Why it's wrong here
NSGs fully support TCP 443, and HTTPS traffic can be allowed when the rule order and match criteria are correct.
✗
The subnet requires a route table before HTTPS can be permitted.
Why it's wrong here
Route tables affect next-hop selection, not whether an NSG allows or denies a packet on a port.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often assume NSG rules are evaluated in the order they appear in the portal (top-to-bottom) or that allow rules override deny rules regardless of priority, but Azure explicitly uses the priority number to determine evaluation order, and a higher-priority deny rule will block traffic even if a lower-priority allow rule exists.
Detailed technical explanation
How to think about this question
NSG rules are processed in ascending order of the priority value (e.g., 100, 200, 300). Once a rule matches, no further rules are evaluated for that packet. This means a deny rule with priority 100 will always block traffic that matches its source, destination, and port before an allow rule with priority 200 is even considered. In real-world scenarios, this is a common misconfiguration when administrators add a broad deny rule (e.g., deny all from a subnet) without ensuring the allow rule has a lower priority number.
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.
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: The deny rule has a higher priority and matches the traffic before the allow rule. — Network Security Groups (NSGs) evaluate rules in order of priority, where a lower priority number (e.g., 100) is evaluated before a higher number (e.g., 200). If a deny rule with a higher priority (lower number) matches the traffic before the allow rule, the traffic is blocked. In this scenario, the deny rule (priority 100) matches the source subnet and destination port 443 before the allow rule (priority 200) can permit it, causing connections to fail.
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.
Are there clue words in this question I should notice?
Yes — watch for: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
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.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.