- A
Azure VPN Gateway
Why wrong: A VPN gateway creates encrypted tunnels over the internet between VNets, but it requires deploying a gateway subnet, incurs additional cost, and adds latency. The question explicitly states no gateway is to be deployed, making this option incorrect.
- B
Azure Virtual Network Peering
Virtual Network Peering connects two VNets privately over Microsoft's backbone network. It supports cross-region (global) peering, uses private IP addresses, does not require a gateway, and provides low-latency, high-throughput connectivity. This exactly meets all stated requirements.
- C
Azure ExpressRoute
Why wrong: ExpressRoute provides dedicated private connectivity from on-premises networks to Azure. It does not directly connect one VNet to another VNet. Additionally, it requires a gateway and an ExpressRoute circuit, which violates the no-gateway requirement.
- D
Azure Load Balancer
Why wrong: Azure Load Balancer distributes incoming traffic across resources inside the same virtual network or across peered VNets, but it does not establish connectivity between VNets. It is a traffic distribution service, not a connectivity service, and cannot be used to link VNet-A and VNet-B.
Quick Answer
The answer is Azure Virtual Network Peering. This service directly connects VNet-A and VNet-B over the Microsoft backbone network, enabling cross-region private IP communication with low latency and no traffic traversing the public internet. Because both virtual networks use non-overlapping IP address spaces, global VNet peering works seamlessly without requiring a virtual network gateway or any additional network appliance. On the AZ-900 exam, this scenario tests your understanding of how Azure provides native, secure connectivity between resources across regions—a common trap is assuming you need a VPN gateway or ExpressRoute for cross-region links, but VNet peering handles this natively. Remember that global peering supports any Azure region, and the key requirement is simply non-overlapping address spaces. For a quick memory tip: think “peer across regions, no gateway needed”—if the question mentions private IPs, low latency, and no public internet, VNet peering is almost always the answer.
AZ-900 Describe Azure architecture and services Practice Question
This AZ-900 practice question tests your understanding of describe azure architecture and services. 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: virtual Network Peering connects two Azure VNets privately.. 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 two Azure virtual networks: VNet-A in the East US region and VNet-B in the West US region. Both virtual networks use non-overlapping IP address spaces and are deployed in different resource groups. The company needs to enable communication between resources in VNet-A and VNet-B using private IP addresses only, with low latency and without any traffic traversing the public internet. The solution must not require deploying a virtual network gateway or any additional network appliance. Which Azure service should the company 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 Network Peering
Azure Virtual Network Peering connects VNet-A and VNet-B directly over the Microsoft backbone network, enabling private IP communication with low latency and no public internet traversal. It requires no virtual network gateway or additional appliances, and works across regions (global peering) as long as IP address spaces are non-overlapping.
Key principle: Virtual Network Peering connects two Azure VNets privately.
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 VPN Gateway
- ✓
Azure Virtual Network Peering
Why this is correct
Virtual Network Peering connects two VNets privately over Microsoft's backbone network. It supports cross-region (global) peering, uses private IP addresses, does not require a gateway, and provides low-latency, high-throughput connectivity. This exactly meets all stated requirements.
Related concept
Virtual Network Peering connects two Azure VNets privately.
- ✗
Azure ExpressRoute
Why it's wrong here
ExpressRoute provides dedicated private connectivity from on-premises networks to Azure. It does not directly connect one VNet to another VNet. Additionally, it requires a gateway and an ExpressRoute circuit, which violates the no-gateway requirement.
- ✗
Azure Load Balancer
Why it's wrong here
Azure Load Balancer distributes incoming traffic across resources inside the same virtual network or across peered VNets, but it does not establish connectivity between VNets. It is a traffic distribution service, not a connectivity service, and cannot be used to link VNet-A and VNet-B.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse VPN Gateway with VNet Peering, assuming a gateway is required for any cross-region connectivity, but Azure Global VNet Peering provides direct private connectivity without gateways or public internet exposure.
Detailed technical explanation
How to think about this question
Global VNet Peering uses the Azure backbone infrastructure to route traffic between VNets in different regions with no single point of failure and latency equivalent to a direct connection. Peering is non-transitive by default, meaning traffic cannot hop through a peered VNet to reach a third VNet unless explicitly configured with a hub-spoke topology or Azure Route Server. The peering connection is established at the Azure fabric layer, leveraging BGP for route exchange between the VNets.
KKey Concepts to Remember
- Virtual Network Peering connects two Azure VNets privately.
- It supports global peering for VNets in different regions.
- Communication uses private IP addresses and Microsoft's backbone network.
- No virtual network gateway or public internet exposure is required.
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
Virtual Network Peering connects two Azure VNets privately.
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 virtual Network Peering connects two Azure VNets privately., then practise related AZ-900 questions on the same topic to reinforce the concept.
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FAQ
Questions learners often ask
What does this AZ-900 question test?
Describe Azure architecture and services — This question tests Describe Azure architecture and services — Virtual Network Peering connects two Azure VNets privately..
What is the correct answer to this question?
The correct answer is: Azure Virtual Network Peering — Azure Virtual Network Peering connects VNet-A and VNet-B directly over the Microsoft backbone network, enabling private IP communication with low latency and no public internet traversal. It requires no virtual network gateway or additional appliances, and works across regions (global peering) as long as IP address spaces are non-overlapping.
What should I do if I get this AZ-900 question wrong?
Review virtual Network Peering connects two Azure VNets privately., then practise related AZ-900 questions on the same topic to reinforce the concept.
What is the key concept behind this question?
Virtual Network Peering connects two Azure VNets privately.
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 →
Same concept, more angles
1 more ways this is tested on AZ-900
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. A company has two Azure virtual networks: VNet-A in the East US region and VNet-B in the West US region. Each VNet hosts a set of virtual machines that run a distributed application. The application requires private, low-latency communication between the VMs in VNet-A and VNet-B. The company wants to minimize operational complexity and avoid any additional billing for data transfer between the two VNets beyond the standard Azure data transfer charges. Which Azure service should the company use to connect the two virtual networks?
medium- ✓ A.Azure Virtual Network Peering
- B.Azure VPN Gateway (Site-to-Site)
- C.Azure ExpressRoute
- D.Azure Front Door
Why A: Azure Virtual Network Peering is the correct choice because it connects two virtual networks directly over the Microsoft backbone network, providing private, low-latency communication between VMs in different regions. It incurs only standard Azure data transfer charges (no additional gateway or circuit costs) and requires minimal operational overhead, as it is a simple configuration with no extra devices or bandwidth provisioning.
Last reviewed: Jun 11, 2026
This AZ-900 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-900 exam.
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