Microsoft Azure Architect Technologies (AZ-300) Practice Exam

Which Azure service helps in creating a high-speed, low-latency connection to Azure?

1. VNet Peering

2. ExpressRoute

3. Azure CDN

4. Site-to-Site VPN

The correct answer is: ExpressRoute

ExpressRoute is the Azure service that facilitates a high-speed, low-latency connection to Azure. This service is designed to establish private connections between Azure data centers and on-premises infrastructure or data centers. Unlike traditional internet connections, ExpressRoute provides a more consistent network experience, lower latency, and increased reliability. It operates over a dedicated connection, which means it doesn't traverse the public internet, significantly reducing the risk of throttling or fluctuations in performance. This makes ExpressRoute ideal for scenarios where high bandwidth and low latency are critical, such as when transmitting large volumes of data or running latency-sensitive applications. Other options, while providing connectivity, do not match the speed and reliability offered by ExpressRoute. For instance, VNet Peering allows for seamless connectivity between virtual networks but relies on Azure’s internal backbone and may not offer the same performance benefits. Azure CDN enhances content delivery and reduces latency for static web content but is not focused on creating a direct connection to Azure. Meanwhile, Site-to-Site VPN provides secure connections over the public internet, which can introduce latency and is generally slower than ExpressRoute. Thus, ExpressRoute is specifically tailored for high-speed and low-latency needs.