Question 1easymultiple choice
Full question →easymultiple choiceObjective-mapped
A company deploys multiple Azure virtual machines across several subnets in a virtual network. The VMs are grouped by application tiers: web, application, and database. The security team wants to apply network security group (NSG) rules that target all VMs in a specific tier, and they need a way to easily add or remove VMs from these groups without updating NSG rules. Which Azure feature should they use to define these logical VM groups?
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
Distractor review
Network security group (NSG) with multiple IP address ranges.
Using IP ranges in NSG rules requires manual updates when VMs are added or removed. It does not provide the logical grouping and automatic membership that ASGs offer.
B
Best answer
Application Security Group (ASG).
ASGs enable you to define logical groups of VMs based on their function. You can reference an ASG in NSG rules, and as VMs are added or removed from the ASG, the rule applies to the current members automatically.
C
Distractor review
Azure Resource Manager tags.
Tags are metadata and do not influence network security. NSG rules cannot directly reference tags; tags are used for cost management and organization, not for networking.
D
Distractor review
Virtual Network peering.
VNet peering connects separate virtual networks but does not help group VMs within a subnet or apply security rules based on application tier.
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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Question 4
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Question 5
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Question 6
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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: Application Security Group (ASG). — Application Security Groups (ASGs) allow you to group virtual machines by a logical name (e.g., 'WebServers') and then use that ASG as a source or destination in NSG rules. When VMs are added or removed from the ASG, the NSG rules automatically apply to the new membership. This simplifies management compared to using individual IP addresses.
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.
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