📖 What is Azure Virtual Network Peering?
Azure Virtual Network Peering is a mechanism that allows you to connect two or more Azure Virtual Networks (VNets) together over the Azure backbone network. Once peered, the networks behave as one for connectivity purposes, enabling low-latency communication between resources.
"Peering is the most efficient way to connect VNets in the same region or across different regions without using a gateway."
📚 Certification: Microsoft Azure Fundamentals (AZ-900)
🔑 What are the Key Concepts of Azure Virtual Network Peering?
- ▸ Traffic between peered networks travels over the Azure backbone network, ensuring that data never traverses the public internet for increased security and performance.
- ▸ Global VNet Peering allows the connection of virtual networks across different Azure regions, providing a seamless way to manage resources on a global scale.
- ▸ Peering provides low-latency, high-bandwidth connectivity without requiring a virtual network gateway, making it more cost-effective and simpler to configure than VPNs.
- ▸ Peering is not transitive; if VNet A peers with VNet B, and B peers with C, A cannot communicate with C without a direct peer.
🎯 How does Azure Virtual Network Peering appear on the AZ-900 Exam?
You may be asked to identify the most efficient way to connect two virtual networks in the same region to ensure low-latency communication while avoiding the cost and complexity of a virtual network gateway.
A scenario might describe a company with resources in both the East US and North Europe regions that need to communicate securely and privately over the Microsoft backbone network using Global VNet Peering.
❓ Frequently Asked Questions
Can I peer virtual networks that are in different Azure subscriptions?
Yes, Azure supports peering across different subscriptions and even different Azure Active Directory tenants, as long as you have the appropriate network contributor permissions on both networks.
What is the main difference between VNet Peering and a VNet-to-VNet VPN?
Peering uses the Azure backbone and requires no gateway, offering lower latency. A VPN uses a gateway and can traverse the public internet, making it better for on-premises connectivity.