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 virtual networks (VNets) in different Azure regions and an on-premises data center connected via ExpressRoute. They want to connect all VNets to each other and to the on-premises network securely over the Microsoft global backbone. They also want to simplify management by using a single orchestration interface. Which Azure service should they use?
Virtual WAN provides a centralized hub-and-spoke architecture that connects VNets and branches over the Microsoft network, with simplified management and orchestration.
B
VNet peering
Why wrong: VNet peering connects two VNets directly but does not provide a single orchestration interface or easy integration with multiple regions and on-premises sites.
C
Azure VPN Gateway
Why wrong: VPN Gateway creates site-to-site or point-to-site connections but is not designed to connect multiple VNets across regions in a managed hub-and-spoke topology.
D
Azure ExpressRoute
Why wrong: ExpressRoute provides a dedicated private connection from on-premises to Azure but does not interconnect multiple VNets or provide a unified management interface.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Azure Virtual WAN
Azure Virtual WAN is correct because it provides a hub-and-spoke architecture that connects branch offices, VNets, and on-premises networks over the Microsoft global backbone. It offers a single orchestration interface for managing connectivity, routing, and security policies across multiple regions and ExpressRoute circuits, meeting the requirement for secure, global connectivity with simplified management.
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.
✓
Azure Virtual WAN
Why this is correct
Virtual WAN provides a centralized hub-and-spoke architecture that connects VNets and branches over the Microsoft network, with simplified management and orchestration.
Related concept
Read the scenario before looking for a memorised answer.
✗
VNet peering
Why it's wrong here
VNet peering connects two VNets directly but does not provide a single orchestration interface or easy integration with multiple regions and on-premises sites.
✗
Azure VPN Gateway
Why it's wrong here
VPNGateway creates site-to-site or point-to-site connections but is not designed to connect multiple VNets across regions in a managed hub-and-spoke topology.
✗
Azure ExpressRoute
Why it's wrong here
ExpressRoute provides a dedicated private connection from on-premises to Azure but does not interconnect multiple VNets or provide a unified management interface.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse VNet peering (which is point-to-point) with the hub-and-spoke model of Virtual WAN, or assume ExpressRoute alone can connect multiple VNets, missing the requirement for a single orchestration interface and transitive routing across regions.
Detailed technical explanation
How to think about this question
Azure Virtual WAN uses a software-defined WAN (SD-WAN) approach with a virtual hub in each region that automatically handles routing via BGP, enabling transitive connectivity between all spokes (VNets, branches, ExpressRoute) without manual peering. Under the hood, it leverages the Microsoft backbone for traffic engineering and can enforce security policies via integrated Azure Firewall or third-party NVAs, making it ideal for global enterprises needing centralized control over hybrid and multi-region networks.
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 healthcare organisation deploys an application with a public-facing web tier and a private database tier. The database subnet has no public IP and only accepts connections from the web tier's security group. Questions like this test whether you can design cloud network isolation using VNets/VPCs, subnets, and security group rules.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this AZ-305 question in full detail.
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: Azure Virtual WAN — Azure Virtual WAN is correct because it provides a hub-and-spoke architecture that connects branch offices, VNets, and on-premises networks over the Microsoft global backbone. It offers a single orchestration interface for managing connectivity, routing, and security policies across multiple regions and ExpressRoute circuits, meeting the requirement for secure, global connectivity with simplified management.
What should I do if I get this AZ-305 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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