Question 1mediummulti select
Review the full subnetting walkthrough →Question 1,017 of 1,170
Quick Answer
The answer is to configure Network Watcher flow logs on AppSubnet, store them in an Azure Storage account, and set a retention policy to manage storage costs. This works because Network Watcher flow logs capture IP traffic flowing through a subnet at the network fabric level, not on the VMs themselves, so there is zero performance impact on your critical application servers. On the AZ-104 exam, this question tests your understanding that flow logs are a subnet-level, agentless monitoring feature—a common trap is thinking you need to install an agent or enable diagnostics on each VM. Remember that flow logs are always stored in a storage account (not Log Analytics by default) and that a retention policy is mandatory to avoid runaway costs. Memory tip: "Flow logs flow through the fabric, not the VM; store them in a blob, and set a retention knob."
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.
You manage an Azure virtual network with multiple subnets, including a subnet named 'AppSubnet' that hosts critical application servers. You need to monitor and log network traffic to and from AppSubnet for security analysis. The solution must capture all flow logs without impacting application performance. Which three of the following should you implement? (Choose three.)
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
✓
Enable Network Watcher flow logs for AppSubnet.
Network Watcher flow logs capture IP traffic flowing through a subnet, providing security analysis without impacting performance because they are processed by the Azure network fabric, not by the VMs. Storing logs in an Azure Storage account ensures durable, cost-effective retention. Configuring a retention policy is essential to manage storage costs and comply with data lifecycle requirements.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse VM-level diagnostic settings (which log guest OS metrics) with subnet-level flow logs, or they mistakenly believe that deploying an NVA is required for traffic monitoring, when in fact Azure's native Network Watcher flow logs provide a performance-neutral solution.
Detailed technical explanation
How to think about this question
Network Watcher flow logs are based on the Azure NSG flow logging feature, which uses the Azure packet broker to sample and aggregate flow records (5-tuple: source/destination IP, port, protocol, and direction) every 60 seconds. Logs are written to a blob storage container in JSON format, and retention is managed via a policy that automatically deletes logs older than the specified number of days (0 to 365). This design ensures zero impact on VM performance because the logging occurs at the NSG level, not on the VM's network stack.
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 startup's cloud architect reviews their monthly bill and notices costs are higher than expected for a long-running batch job. Switching from on-demand instances to Reserved Instances — or using Spot/Preemptible VMs — can reduce compute costs by up to 72 %. Questions like this test whether you understand the tradeoffs between commitment, flexibility, and cost across cloud pricing models.
What to study next
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FAQ
Questions learners often ask
What does this AZ-104 question test?
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: Enable Network Watcher flow logs for AppSubnet. — Network Watcher flow logs capture IP traffic flowing through a subnet, providing security analysis without impacting performance because they are processed by the Azure network fabric, not by the VMs. Storing logs in an Azure Storage account ensures durable, cost-effective retention. Configuring a retention policy is essential to manage storage costs and comply with data lifecycle requirements.
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.
About these practice questions
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Last reviewed: Jun 11, 2026
This AZ-104 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-104 exam.
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