Question 187 of 1,000

Secure networking →easyMultiple ChoiceObjective-mapped

AZ-500 Secure networking Practice Question

This AZ-500 practice question tests your understanding of secure 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.

A company has an Azure virtual network with a subnet that hosts a public web application. They want to allow inbound HTTPS traffic (port 443) only from the source IP range 203.0.113.0/24, and block all other inbound traffic. They associate a network security group (NSG) with the subnet. What is the minimum number of inbound security rules required in the NSG to achieve this?

Clue words in this question

Noticing these words before you look at the options changes how you read each choice.

Clue: "minimum / minimize"
Why it matters: Asks for the least resource use — fewest addresses, smallest subnet, lowest overhead. Eliminate over-provisioned options even if they would technically work.

Question 1easymultiple choice

Review the full subnetting walkthrough →

A
0 (no additional rules needed because the default rules block all inbound traffic)
Why wrong: The default rules block traffic from the internet, so no HTTPS traffic would be allowed. An explicit allow rule is required.
B
1
One allow rule for HTTPS from the specific IP range is sufficient. The default deny rule blocks all other traffic automatically.
C
2 (one allow rule for HTTPS and one deny rule for all other traffic)
Why wrong: An explicit deny rule is unnecessary because the NSG already includes a default deny all inbound rule. Adding an explicit deny would be redundant.
D
3 (one allow HTTPS, one allow for Azure Load Balancer health probes, and one deny all)
Why wrong: The default rules already allow Azure Load Balancer health probes. No additional rule is needed for that, and the explicit deny is still redundant.

Full breakdown with real-world context →

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

✓

Option B is correct because NSGs include default inbound rules that already block all inbound traffic not explicitly allowed. By adding a single inbound rule to allow HTTPS (port 443) from the source IP range 203.0.113.0/24, all other inbound traffic is implicitly denied by the default deny-all rule (rule 65000). No explicit deny rule is needed, and no additional rules for Azure Load Balancer health probes are required unless the application is behind a load balancer, which is not specified in the scenario.

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.

✗
0 (no additional rules needed because the default rules block all inbound traffic)
Why it's wrong here
The default rules block traffic from the internet, so no HTTPS traffic would be allowed. An explicit allow rule is required.
✓
1
Why this is correct
One allow rule for HTTPS from the specific IP range is sufficient. The default deny rule blocks all other traffic automatically.
Clue confirmation
The clue word "minimum / minimize" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
2 (one allow rule for HTTPS and one deny rule for all other traffic)
Why it's wrong here
An explicit deny rule is unnecessary because the NSG already includes a default deny all inbound rule. Adding an explicit deny would be redundant.
✗
3 (one allow HTTPS, one allow for Azure Load Balancer health probes, and one deny all)
Why it's wrong here
The default rules already allow Azure Load Balancer health probes. No additional rule is needed for that, and the explicit deny is still redundant.

Common exam traps

Common exam trap: answer the scenario, not the keyword

The trap here is that candidates often think they need an explicit deny rule to block all other traffic, forgetting that NSGs have a built-in default deny-all rule that automatically handles this.

Detailed technical explanation

How to think about this question

NSGs process rules in priority order, with lower numbers evaluated first. The default inbound rules include 'AllowVNetInBound' (priority 65000) and 'AllowAzureLoadBalancerInBound' (priority 65001), but the final default rule 'DenyAllInBound' (priority 65500) blocks all unmatched traffic. By adding a single allow rule with a priority lower than 65500 (e.g., 100), HTTPS traffic from 203.0.113.0/24 is permitted, and all other traffic is denied by the default rule. This design avoids the need for explicit deny rules, reducing administrative overhead and rule count.

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.

Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.

Related AZ-500 practice-question pages

Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.

Secure identity and access practice questions

Practise AZ-500 questions linked to Secure identity and access.

Secure compute, storage, and databases practice questions

Practise AZ-500 questions linked to Secure compute, storage, and databases.

Secure Azure using Microsoft Defender for Cloud and Microsoft Sentinel practice questions

Practise AZ-500 questions linked to Secure Azure using Microsoft Defender for Cloud and Microsoft Sentinel.

Manage identity and access practice questions

Practise AZ-500 questions linked to Manage identity and access.

Secure networking practice questions

Practise AZ-500 questions linked to Secure networking.

AZ-500 fundamentals practice questions

Practise AZ-500 questions linked to AZ-500 fundamentals.

AZ-500 scenario practice questions

Practise AZ-500 questions linked to AZ-500 scenario.

AZ-500 troubleshooting practice questions

Practise AZ-500 questions linked to AZ-500 troubleshooting.

Practice this exam

Start a free AZ-500 practice session

Short sessions build daily habit. Longer sessions build exam-day stamina. Try a timed session to simulate real conditions.

10 questions 20 questions 30 questions 50 questions Timed 30

AZ-500 practice-test guide →Study guide →Browse all practice tests

FAQ

Questions learners often ask

What does this AZ-500 question test?

Secure networking — This question tests Secure networking — Read the scenario before looking for a memorised answer..

What is the correct answer to this question?

The correct answer is: 1 — Option B is correct because NSGs include default inbound rules that already block all inbound traffic not explicitly allowed. By adding a single inbound rule to allow HTTPS (port 443) from the source IP range 203.0.113.0/24, all other inbound traffic is implicitly denied by the default deny-all rule (rule 65000). No explicit deny rule is needed, and no additional rules for Azure Load Balancer health probes are required unless the application is behind a load balancer, which is not specified in the scenario.

What should I do if I get this AZ-500 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: "minimum / minimize". Asks for the least resource use — fewest addresses, smallest subnet, lowest overhead. Eliminate over-provisioned options even if they would technically work.

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 →

How Courseiva writes practice questions · Editorial policy

Keep practising

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.

Loading comments…

This AZ-500 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-500 exam.