- A
Azure Virtual WAN
Azure Virtual WAN provides a centralized hub that connects VNets, VPN sites, and ExpressRoute circuits. It automatically sets up transitive routing between all connected VNets and on-premises, simplifying management.
- B
VNet peering
Why wrong: VNet peering connects two VNets directly but does not provide transitive routing. Connecting multiple VNets requires a mesh of peerings, which is complex and does not natively include ExpressRoute connectivity without additional gateways.
- C
ExpressRoute
Why wrong: ExpressRoute provides a dedicated private connection to on-premises, but it does not directly connect multiple VNets. Additional routing configuration or a hub VNet is needed.
- D
VPN Gateway
Why wrong: VPN Gateway connects an on-premises site to Azure over the internet, but it does not automatically connect multiple VNets. Each VNet would need its own gateway or complex configurations.
AZ-305 Design infrastructure solutions Practice Question
This AZ-305 practice question tests your understanding of design infrastructure solutions. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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 regions. They want to connect all VNets to each other securely over the Microsoft backbone network, and also connect to their on-premises data center via ExpressRoute. What is the simplest Azure solution to enable connectivity between all VNets and on-premises?
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 the simplest solution because it provides a hub-and-spoke architecture that automatically connects all VNets and on-premises sites over the Microsoft backbone network. It natively integrates ExpressRoute and VPN gateways into a single managed service, eliminating the need to manually configure multiple peering or gateway connections.
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
Azure Virtual WAN provides a centralized hub that connects VNets, VPN sites, and ExpressRoute circuits. It automatically sets up transitive routing between all connected VNets and on-premises, simplifying management.
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 transitive routing. Connecting multiple VNets requires a mesh of peerings, which is complex and does not natively include ExpressRoute connectivity without additional gateways.
- ✗
ExpressRoute
Why it's wrong here
ExpressRoute provides a dedicated private connection to on-premises, but it does not directly connect multiple VNets. Additional routing configuration or a hub VNet is needed.
- ✗
VPN Gateway
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often assume VNet peering or a single ExpressRoute circuit can provide transitive connectivity between all VNets and on-premises, but they forget that VNet peering is non-transitive and ExpressRoute alone does not route between VNets without additional gateways or a hub.
Detailed technical explanation
How to think about this question
Azure Virtual WAN uses a managed hub that hosts a virtual router using BGP (Border Gateway Protocol) to propagate routes between all connected VNets, ExpressRoute circuits, and VPN sites. The hub automatically handles route table propagation and can scale to hundreds of spokes without manual intervention, leveraging the Microsoft backbone for low-latency, high-throughput traffic.
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.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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Design infrastructure solutions — study guide chapter
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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 — 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 the simplest solution because it provides a hub-and-spoke architecture that automatically connects all VNets and on-premises sites over the Microsoft backbone network. It natively integrates ExpressRoute and VPN gateways into a single managed service, eliminating the need to manually configure multiple peering or gateway connections.
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.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Last reviewed: Jun 11, 2026
This AZ-305 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-305 exam.
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