Microsoft Certified: Azure Developer Associate (AZ-204)Develop Azure compute solutionsHard
A global company is deploying a critical web application to Azure App Service. The application must be highly available and resilient to regional outages. It also needs to serve users with the lowest possible latency by directing them to the closest available instance. Which Azure service should be used in conjunction with Azure App Service to meet these requirements?
- AAzure Front Door
- BAzure Load Balancer
- CAzure Application Gateway
- DAzure Traffic Manager
Show answer & explanationAnswer & explanation
Correct answer: A. 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. It provides dynamic site acceleration, global HTTP load balancing, SSL offload, and web application firewall capabilities. Crucially, it directs user requests to the closest backend instance, ensuring lowest latency, and provides high availability across regions.
Why the other options are wrong
- B. Azure Load Balancer is a layer 4 load balancer that operates within a single Azure region, providing high availability for services within that region but not global traffic distribution or latency optimization.
- C. Azure Application Gateway is a regional layer 7 load balancer, suitable for distributing traffic within a single Azure region, but not for global latency-based routing across regions.
- D. Azure Traffic Manager is a DNS-based traffic load balancer that can direct users to the closest or healthiest endpoint, but it operates at the DNS level, which doesn't provide the same level of acceleration, WAF, or HTTP-specific features as Front Door.
Azure Front Door
A global, scalable entry-point that uses the Microsoft global edge network to create fast, secure, and widely scalable web applications.
- Global HTTP/HTTPS load balancing (Layer 7)
- Dynamic site acceleration (DSA)
- Web Application Firewall (WAF)
- SSL offloading, end-to-end SSL
Memory trick: Front Door is the First choice for global web apps.