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.
A team manages three backend servers in one subnet. The servers are replaced periodically, so their private IP addresses change. The NSG must allow inbound traffic from the web tier without updating individual IP addresses each time. Which destination object should be used in the NSG rule?
An application security group lets you group VMs by application role rather than by fixed IP address. NSG rules can reference the ASG so the rule continues to work even when the VM IPs change.
B
Service tag
Why wrong: Service tags represent Microsoft-managed address ranges for Azure services, not your own backend VMs. They are not the right way to group private application servers.
C
Route table
Why wrong: A route table controls traffic forwarding, not NSG rule targeting. It cannot replace the need for a security grouping object in the rule.
D
Private endpoint
Why wrong: Private endpoints are for private access to supported PaaS services, not for grouping compute instances into a security target in NSG rules.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Application security group
An Application Security Group (ASG) allows you to group backend servers logically, regardless of their private IP addresses, and reference that group as the destination in an NSG rule. When servers are replaced and their IPs change, the ASG membership is automatically updated, so the NSG rule continues to apply without manual intervention. This is the correct approach for dynamic workloads where IP addresses are not static.
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.
✓
Application security group
Why this is correct
An application security group lets you group VMs by application role rather than by fixed IP address. NSG rules can reference the ASG so the rule continues to work even when the VMIPs change.
Related concept
Read the scenario before looking for a memorised answer.
✗
Service tag
Why it's wrong here
Service tags represent Microsoft-managed address ranges for Azure services, not your own backend VMs. They are not the right way to group private application servers.
✗
Route table
Why it's wrong here
A route table controls traffic forwarding, not NSG rule targeting. It cannot replace the need for a security grouping object in the rule.
✗
Private endpoint
Why it's wrong here
Private endpoints are for private access to supported PaaS services, not for grouping compute instances into a security target in NSG rules.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse Application Security Groups with Network Security Groups themselves, or mistakenly think Service Tags can be used to group their own VMs, when Service Tags are only for Azure platform services or well-known IP ranges.
Detailed technical explanation
How to think about this question
Under the hood, an Application Security Group is a logical container that holds references to VM NICs. When you create an NSG rule with an ASG as the destination, Azure's network fabric evaluates the rule against all NICs in that ASG, translating the group membership into the current private IP addresses at packet processing time. This is particularly useful in auto-scaling scenarios or when VMs are replaced via Azure VMSS or update domains, as the ASG membership updates automatically without requiring NSG rule changes.
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 media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
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: Application security group — An Application Security Group (ASG) allows you to group backend servers logically, regardless of their private IP addresses, and reference that group as the destination in an NSG rule. When servers are replaced and their IPs change, the ASG membership is automatically updated, so the NSG rule continues to apply without manual intervention. This is the correct approach for dynamic workloads where IP addresses are not static.
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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Question Discussion
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