Question 1mediummultiple choice
Full question →mediummultiple choiceObjective-mapped
A company has an Azure virtual network with two subnets: App and Data. The App subnet hosts web servers, and the Data subnet hosts SQL databases. Security policy requires that only HTTPS traffic from the App subnet is allowed to the Data subnet, and all other inbound traffic to the Data subnet must be blocked. The solution must use a single network security group (NSG) associated to the Data subnet. Which NSG inbound rule configuration meets the requirement?
Answer choices
Why each option matters
Good practice is not just finding the correct option. The wrong answers often show the exact trap the exam wants you to fall into.
A
Best answer
Allow HTTPS from App subnet priority 100, then Deny All priority 200
Correct. The Allow rule has higher priority (100) than the Deny All rule (200), so HTTPS from App subnet is allowed and all other traffic is blocked.
B
Distractor review
Deny All priority 100, then Allow HTTPS from App subnet priority 200
Incorrect. The Deny All rule has higher priority (100) and would block all traffic, including HTTPS from App subnet, before the Allow rule is evaluated.
C
Distractor review
Allow HTTPS from App subnet priority 100, and Deny All from any source priority 100 (duplicate priority)
Incorrect. NSG rules cannot have the same priority. Additionally, this configuration does not guarantee the correct order of evaluation.
D
Distractor review
Allow HTTPS from App subnet priority 100, no other rules
Incorrect. Without a Deny All rule, the default implicit allow rule will permit all other inbound traffic to the Data subnet.
Common exam trap
Common exam trap: usable hosts are not the same as total addresses
Subnetting questions often tempt you into counting all addresses. In normal IPv4 subnets, the network and broadcast addresses are not usable host addresses.
Technical deep dive
How to think about this question
Subnetting questions test whether you can identify the network, broadcast address, usable range, mask and correct subnet. Slow down enough to calculate the block size correctly.
KKey Concepts to Remember
- CIDR notation defines the prefix length.
- Block size helps identify subnet boundaries.
- Network and broadcast addresses are not usable hosts in normal IPv4 subnets.
- The required host count determines the smallest suitable subnet.
TExam Day Tips
- Write the block size before choosing the subnet.
- Check whether the question asks for hosts, subnets or a specific address range.
- Do not confuse /24, /25, /26 and /27 host counts.
Related practice questions
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.
More questions from this exam
Keep practising from the same exam bank, or move into a focused topic page if this question exposed a weak area.
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FAQ
Questions learners often ask
What does this AZ-500 question test?
CIDR notation defines the prefix length.
What is the correct answer to this question?
The correct answer is: Allow HTTPS from App subnet priority 100, then Deny All priority 200 — Network security group (NSG) rules are evaluated in priority order. To allow only specific traffic and block all else, you must create an Allow rule with a higher priority (lower number) for the allowed traffic, and a Deny All rule with a lower priority (higher number). The Deny All rule will block any traffic not explicitly allowed. Option B correctly places the Deny All rule after the Allow rule in priority, ensuring HTTPS traffic from App subnet is allowed and all other inbound traffic is denied. Option A would block HTTPS first. Option C is ambiguous and may not enforce the correct order. Option D lacks a Deny All rule, leaving the default implicit allow for all traffic, which fails the requirement.
What should I do if I get this AZ-500 question wrong?
Then try more questions from the same exam bank and focus on understanding why the wrong options are tempting.
Discussion
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