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  1. Azure Regions: Deploy your function app to multiple Azure regions. Each region hosts a separate instance of your function app.

  2. Global Load Balancing: Azure's global load balancer monitors the health of each instance of your function app across all regions. If an instance becomes unhealthy due to a failure or other issue, Azure automatically redirects traffic to healthy instances in other regions.

  3. Automatic Failover: In the event of a failure in one region, Azure automatically redirects traffic to the nearest healthy instance in another region. This ensures that your function app remains available even if one region experiences downtime.

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