AZ-700 Question 210
Single answerYou manage a global e-commerce platform with two Azure App Services running in East US and West Europe. You want to configure Azure Front Door so that user traffic is directed to the East US region by default and automatically fails over to West Europe if East US becomes unavailable. Which configuration approach should you choose?
- A
Configure priority-based routing with East US set to Priority 1 and West Europe set to Priority 2, enabling health probes for both backends.
- B
Use weighted routing with East US set to a heavy weight (e.g., 100) and West Europe set to zero so all traffic remains in East US.
- C
Enable session affinity to ensure all user sessions remain connected to the East US backend.
- D
Create a separate Azure Front Door instance exclusively for the West Europe backend and switch traffic manually during downtime.
Show answer and explanation
Correct answer: A
Explanation
In Azure Front Door, you can implement active/passive failover by selecting priority-based routing for your backends and configuring health probes. When East US is healthy (Priority 1), traffic is routed there. If a probe detects that East US is down, traffic automatically fails over to West Europe (Priority 2). For further details, refer to Microsoft� documentation on Azure Front Door routing and health probes.
- A. Correct.
Correct. Priority-based routing with health probes is the recommended approach for active/passive failover. By assigning East US a higher priority, traffic will flow there by default, and if the health probe indicates that East US is unavailable, Front Door directs traffic to West Europe automatically.
- B. Incorrect.
Incorrect. Weighted routing divides traffic based on weight but does not provide true failover. A weight of zero might prevent traffic from going to West Europe under normal conditions, but it isn�t the proper method to ensure automatic failover.
- C. Incorrect.
Incorrect. Session affinity keeps users on a particular backend once they start a session. It doesn't handle active/passive failover requirements if the primary region goes down.
- D. Incorrect.
Incorrect. Creating a separate Azure Front Door instance for West Europe would require manual reconfiguration or DNS changes, which is not automated failover. Active/passive failover should be managed within a single Front Door configuration.