Microsoft Certified: Azure Solutions Architect ExpertDesign infrastructure solutionsMedium
A financial institution is deploying a new trading platform in Azure. The platform requires extremely low latency (sub-millisecond) connectivity between its application servers and a high-performance database. The application servers and the database are deployed in separate virtual networks within the same Azure region. Which networking solution should be used to ensure the lowest possible latency between these components?
- AAzure VPN Gateway
- BAzure Virtual WAN
- CAzure ExpressRoute
- DVNet Peering
Show answer & explanationAnswer & explanation
Correct answer: D. VNet Peering
VNet Peering connects Azure Virtual Networks within the same region (or across regions) using the Azure backbone network. It provides high-bandwidth, low-latency connectivity as traffic travels privately without traversing the public internet, making it ideal for sub-millisecond requirements within Azure.
Why the other options are wrong
- A. Azure VPN Gateway connects Azure VNets to on-premises or other VNets over the public internet (or private IPsec tunnels), introducing higher latency.
- B. Azure Virtual WAN is a networking service for large-scale branch connectivity and global transit, not optimized for sub-millisecond VNet-to-VNet latency within a single region.
- C. Azure ExpressRoute connects on-premises networks to Azure, not primarily for VNet-to-VNet communication within Azure.
Azure VNet Peering
VNet Peering connects two or more Azure Virtual Networks, allowing them to communicate with each other seamlessly. The traffic between peered VNets uses the Azure backbone infrastructure and remains private.
- Connects VNets within or across regions
- High-bandwidth, low-latency private connectivity
- Traffic stays on Azure backbone, no public internet
Memory trick: Peering is like a private bridge between two cloud neighborhoods, super fast and direct.