Microsoft Certified: Azure Solutions Architect ExpertDesign business continuity solutionsHard
A company hosts a critical web application on Azure App Service. To ensure high availability, the company wants to distribute traffic across multiple instances of the App Service in different Azure regions and automatically route users to the closest healthy endpoint. Which Azure service should be used?
- AAzure Application Gateway
- BAzure Traffic Manager
- CAzure Front Door
- DAzure Load Balancer
Show answer & explanationAnswer & explanation
Correct answer: C. Azure Front Door
Azure Front Door provides global HTTP/HTTPS load balancing and site acceleration, routing user requests to the closest healthy backend in a different region, making it ideal for multi-region web applications with advanced routing and security features.
Why the other options are wrong
- A. Azure Application Gateway is a regional Layer 7 (HTTP/HTTPS) load balancer and WAF, suitable for distributing traffic within a single region or across availability zones, but not globally across regions for closest endpoint routing.
- B. Azure Traffic Manager is a DNS-based traffic load balancer that operates at the DNS level, routing users to different service endpoints based on various routing methods. While it can route across regions, Front Door offers more advanced Layer 7 features like WAF, SSL offloading, and path-based routing, which are typically preferred for web applications.
- D. Azure Load Balancer operates at Layer 4 (TCP/UDP) and is regional, not designed for global traffic distribution across multiple regions for HTTP/HTTPS applications.
Azure Front Door
Azure Front Door is a global, scalable entry-point that uses the Microsoft global edge network to create fast, secure, and widely scalable web applications, offering Layer 7 load balancing.
- Global HTTP/HTTPS load balancer.
- Routes traffic to the closest healthy backend.
- Provides WAF, SSL offloading, and path-based routing.
Memory trick: Front Door: Global gateway for web apps, fast and secure.