Which TWO of the following Azure services can be used to enable automatic failover of a web application across Azure regions?
Azure Front Door is a global Layer 7 anycast service that continuously health-checks each backend or origin and uses that status to steer traffic to the nearest healthy region. When a region fails, Front Door quickly removes that origin from its active routing set, causing users to be redirected to another region with minimal disruption. It also provides TLS termination, URL-based routing, and a web application firewall, making it a robust choice for global web applications.
Why this answer
Azure Front Door is a global, scalable entry point that provides built-in automatic failover across regions using anycast-based routing and health probes. When a primary region becomes unhealthy, Front Door instantly routes traffic to the next available healthy backend, enabling seamless multi-region failover for web applications.
Exam trap
The trap here is that candidates often confuse Azure Traffic Manager (DNS-based) with Azure Front Door (anycast-based), assuming both provide identical failover speed, but Front Door offers faster, more granular failover due to its anycast architecture and Layer 7 capabilities.