- A
VNet peering
Why wrong: VNet peering provides connectivity between two VNets but is not transitive. It would require a full mesh of peerings to connect all VNets, and it does not natively connect to on-premises networks or provide centralized management.
- B
Azure Virtual WAN
Azure Virtual WAN provides a hub-and-spoke architecture with built-in transitive routing between VNets and on-premises sites via ExpressRoute or VPN. It offers centralized management of connectivity, routing, and security policies.
- C
VPN Gateway
Why wrong: VPN Gateway can connect VNets to on-premises via IPsec, but transitive routing between multiple VNets requires additional VPN Gateways and complex configuration. It does not provide centralized management for multiple regions.
- D
ExpressRoute Direct
Why wrong: ExpressRoute Direct is a physical port provisioning option for ExpressRoute. It does not directly provide transitive connectivity between VNets or centralized routing management; it is a connectivity layer.
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. A key principle to apply: azure Virtual WAN provides a global, unified network architecture.. 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 Azure virtual networks (VNets) in three different Azure regions (West US, East US, and West Europe). They also have an on-premises data center connected to the East US region via ExpressRoute. They need to connect all VNets to each other and to the on-premises network. The solution must support transitive routing between all sites and provide centralized management of connectivity and routing policies. Which Azure service should they use?
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
Azure Virtual WAN
Azure Virtual WAN is correct because it provides a hub-and-spoke architecture with built-in transitive routing between all VNets and on-premises sites. It supports automatic connectivity through Virtual Hub routers, which use BGP to propagate routes across all spokes and branches, meeting the requirement for centralized management of connectivity and routing policies.
Key principle: Azure Virtual WAN provides a global, unified network architecture.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
VNet peering
Why it's wrong here
VNet peering provides connectivity between two VNets but is not transitive. It would require a full mesh of peerings to connect all VNets, and it does not natively connect to on-premises networks or provide centralized management.
- ✓
Azure Virtual WAN
Why this is correct
Azure Virtual WAN provides a hub-and-spoke architecture with built-in transitive routing between VNets and on-premises sites via ExpressRoute or VPN. It offers centralized management of connectivity, routing, and security policies.
Related concept
Azure Virtual WAN provides a global, unified network architecture.
- ✗
VPN Gateway
- ✗
ExpressRoute Direct
Why it's wrong here
ExpressRoute Direct is a physical port provisioning option for ExpressRoute. It does not directly provide transitive connectivity between VNets or centralized routing management; it is a connectivity layer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often assume VNet peering can be chained to achieve transitive routing, but Azure explicitly blocks transitive routing through peered VNets unless a network virtual appliance or Azure Virtual WAN is used.
Detailed technical explanation
How to think about this question
Azure Virtual WAN uses a managed Virtual Hub router that runs the BGP routing protocol internally, enabling automatic route exchange between all connected VNets (via VNet connections) and on-premises branches (via ExpressRoute or VPN gateways). This eliminates the need for manual route tables or complex hub-and-spoke configurations, and it supports global transit network architecture with built-in encryption and traffic engineering capabilities.
KKey Concepts to Remember
- Azure Virtual WAN provides a global, unified network architecture.
- It supports transitive routing between all connected VNets and on-premises sites.
- Virtual WAN offers centralized connectivity, routing, and security policy management.
- It integrates seamlessly with ExpressRoute and site-to-site VPN for hybrid connectivity.
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
Azure Virtual WAN provides a global, unified network architecture.
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.
What to study next
Got this wrong? Here's your next step.
Review azure Virtual WAN provides a global, unified network architecture., then practise related AZ-305 questions on the same topic to reinforce the concept.
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FAQ
Questions learners often ask
What does this AZ-305 question test?
Design infrastructure solutions — This question tests Design infrastructure solutions — Azure Virtual WAN provides a global, unified network architecture..
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 with built-in transitive routing between all VNets and on-premises sites. It supports automatic connectivity through Virtual Hub routers, which use BGP to propagate routes across all spokes and branches, meeting the requirement for centralized management of connectivity and routing policies.
What should I do if I get this AZ-305 question wrong?
Review azure Virtual WAN provides a global, unified network architecture., then practise related AZ-305 questions on the same topic to reinforce the concept.
What is the key concept behind this question?
Azure Virtual WAN provides a global, unified network architecture.
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Last reviewed: Jun 11, 2026
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