The answer is to implement Azure Virtual WAN with a secured hub and Azure Firewall Manager. This solution is correct because it provides a centralized, scalable architecture that enforces consistent network policies across multiple subscriptions and regions by routing all internet-bound traffic through a central firewall for inspection. On the Microsoft Azure Solutions Architect Expert AZ-305 exam, this scenario tests your understanding of how to design a global network topology that balances security, scalability, and policy enforcement—a common trap is confusing Azure Policy (which only audits or enforces rules, not traffic inspection) with a network control plane, or assuming a single Azure Firewall in a peered VNet can scale across subscriptions. Remember the key distinction: Azure Policy governs compliance, but Virtual WAN with a secured hub governs traffic flow. Memory tip: think “WAN for the wide area, Firewall Manager for the force field”—together they inspect every internet exit across all subscriptions.
AZ-305 Design infrastructure solutions Practice Question
This AZ-305 practice question tests your understanding of design infrastructure solutions. 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 company has multiple Azure subscriptions and wants to enforce consistent network policies across all VNets. They need to ensure that all traffic going out to the internet is inspected by a central firewall. The solution must be scalable and support multiple regions. What should they implement?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use Azure Virtual WAN with a secured hub and Azure Firewall Manager
Option B is correct because Azure Virtual WAN with a secured hub using Azure Firewall Manager provides centralized internet inspection for multiple regions. Option A is incorrect because Azure Firewall in a single VNet does not scale across subscriptions without Virtual WAN. Option C is incorrect because Azure Policy enforces rules but does not inspect traffic. Option D is incorrect because VNet peering does not centralize traffic inspection.
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.
✓
Use Azure Virtual WAN with a secured hub and Azure Firewall Manager
Why this is correct
Virtual WAN provides centralized routing and inspection across regions.
Related concept
Read the scenario before looking for a memorised answer.
✗
Deploy Azure Firewall in each subscription and route traffic through it
Why it's wrong here
This is decentralized and not scalable.
✗
Use Azure Policy to enforce route tables on each VNet
Why it's wrong here
Azure Policy does not inspect traffic.
✗
Create VNet peering and use a network virtual appliance in one subscription
Why it's wrong here
This is not scalable across many subscriptions.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
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.
Use explanations to understand the rule behind the answer.
TExam Day Tips
→Underline the problem statement mentally.
→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
An e-commerce site experiences heavy traffic on Black Friday and near-zero traffic during off-peak weeks. Rather than provisioning permanent large VMs, the team uses auto-scaling groups that add capacity automatically under load and reduce it overnight. Questions like this test whether you understand elasticity, availability zones, and cloud compute scaling patterns.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this AZ-305 question in full detail.
Identify which AZ-305 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Design infrastructure solutions — This question tests Design infrastructure solutions — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Use Azure Virtual WAN with a secured hub and Azure Firewall Manager — Option B is correct because Azure Virtual WAN with a secured hub using Azure Firewall Manager provides centralized internet inspection for multiple regions. Option A is incorrect because Azure Firewall in a single VNet does not scale across subscriptions without Virtual WAN. Option C is incorrect because Azure Policy enforces rules but does not inspect traffic. Option D is incorrect because VNet peering does not centralize traffic inspection.
What should I do if I get this AZ-305 question wrong?
Identify which AZ-305 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
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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