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 on-premises sites and Azure VNets in different regions. They need to connect all networks with a single mesh topology, ensuring that any network can communicate with any other network directly. They also want to minimize administrative overhead. Which Azure service should they use?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "minimum / minimize"
Why it matters: Asks for the least resource use — fewest addresses, smallest subnet, lowest overhead. Eliminate over-provisioned options even if they would technically work.
Virtual WAN provides a scalable and automated mesh connectivity solution with integrated routing, reducing manual configuration overhead.
B
Azure VPN Gateway
Why wrong: VPN Gateway allows creating site-to-site connections but requires configuring each connection individually and does not provide a single mesh topology with automatic routing.
C
Azure ExpressRoute
Why wrong: ExpressRoute provides private connectivity to Azure but does not inherently create a mesh between multiple on-premises sites and VNets.
D
Azure Peering Service
Why wrong: Peering Service is for optimizing connectivity to Microsoft cloud services, not for building a network mesh.
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 correct choice because it provides a managed, global mesh network that automatically connects on-premises sites and Azure VNets across regions using a hub-and-spoke architecture with built-in transitive routing. This eliminates the need to manually configure individual VPN gateways or ExpressRoute circuits for each pair of networks, directly supporting the requirement for any-to-any direct communication with minimal administrative overhead.
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 scalable and automated mesh connectivity solution with integrated routing, reducing manual configuration overhead.
Clue confirmation
The clue word "minimum / minimize" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
Azure VPN Gateway
Why it's wrong here
VPNGateway allows creating site-to-site connections but requires configuring each connection individually and does not provide a single mesh topology with automatic routing.
✗
Azure ExpressRoute
Why it's wrong here
ExpressRoute provides private connectivity to Azure but does not inherently create a mesh between multiple on-premises sites and VNets.
✗
Azure Peering Service
Why it's wrong here
Peering Service is for optimizing connectivity to Microsoft cloud services, not for building a network mesh.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse Azure VPNGateway's ability to create multiple site-to-site connections with a true mesh topology, overlooking that VPN Gateway lacks automatic transitive routing and requires manual configuration for any-to-any connectivity, whereas Virtual WAN provides this natively.
Detailed technical explanation
How to think about this question
Azure Virtual WAN uses a hub-and-spoke topology where each region has a virtual hub that acts as a central transit point, automatically handling routing between all connected spokes (VNets, VPN sites, ExpressRoute circuits) via BGP. This enables transitive routing without manual route tables, and the service supports multiple connectivity types (Site-to-Site VPN, Point-to-Site VPN, ExpressRoute) within the same hub, scaling to hundreds of branches and VNets. In a real-world scenario, a global enterprise with offices in 50 regions can deploy Virtual WAN to achieve full mesh connectivity without the operational burden of managing thousands of individual VPN tunnels.
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 the correct choice because it provides a managed, global mesh network that automatically connects on-premises sites and Azure VNets across regions using a hub-and-spoke architecture with built-in transitive routing. This eliminates the need to manually configure individual VPN gateways or ExpressRoute circuits for each pair of networks, directly supporting the requirement for any-to-any direct communication with minimal administrative overhead.
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.
Are there clue words in this question I should notice?
Yes — watch for: "minimum / minimize". Asks for the least resource use — fewest addresses, smallest subnet, lowest overhead. Eliminate over-provisioned options even if they would technically work.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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