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 many application VMs and backend VMs. The VM IP addresses change whenever they are rebuilt, but the same traffic rule must always allow the app tier to reach the backend tier on TCP 8443. What should the administrator use in the NSG rule?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "always"
Why it matters: Absolute qualifier. An answer using 'always' is only correct if there are genuinely no exceptions — absolute statements are often wrong in networking.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Application Security Groups for the app and backend VMs.
Application Security Groups (ASGs) allow you to group VMs logically and reference them directly in NSG rules without relying on static IP addresses. Since the VMIPs change on rebuild, ASGs ensure the NSG rule for TCP 8443 always applies to the correct app and backend tiers, regardless of IP changes.
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.
✗
Static private IP addresses for each virtual machine.
Why it's wrong here
Static IPs would work, but they are harder to maintain and do not solve the rebuild-based admin overhead.
✓
Application Security Groups for the app and backend VMs.
Why this is correct
ASGs let you group VMs by function and reference those groups in NSG rules, so IP changes do not require rule updates.
Clue confirmation
The clue word "always" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
A user-defined route between the app and backend subnets.
Why it's wrong here
Routes choose traffic paths, but they do not express which application tier may talk to another tier.
✗
An availability set for each tier.
Why it's wrong here
Availability sets improve resilience, but they do not simplify NSG targeting or traffic authorization.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often default to static IPs (Option A) for consistency, overlooking that ASGs provide a dynamic, IP-agnostic solution that directly addresses the rebuild scenario.
Detailed technical explanation
How to think about this question
ASGs work by tagging VM NICs with a group name, and NSG rules reference that name (e.g., 'Allow_App_to_Backend') instead of source/destination IPs. Under the hood, Azure translates the ASG membership into the actual IP addresses of the VMs at rule evaluation time, dynamically updating as VMs are rebuilt or moved. This is particularly useful in auto-scaling or CI/CD pipelines where VMs are ephemeral and IPs are unpredictable.
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 Groups for the app and backend VMs. — Application Security Groups (ASGs) allow you to group VMs logically and reference them directly in NSG rules without relying on static IP addresses. Since the VM IPs change on rebuild, ASGs ensure the NSG rule for TCP 8443 always applies to the correct app and backend tiers, regardless of IP changes.
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: "always". Absolute qualifier. An answer using 'always' is only correct if there are genuinely no exceptions — absolute statements are often wrong in networking.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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