You are deploying an Azure Application Gateway v2 to load balance traffic for a critical web application.

The backend pool consists of Virtual Machine Scale Sets deployed across Availability Zones 1, 2, and 3. You need to ensure that the Application Gateway itself is highly available and can survive the failure of a single Availability Zone.

How should you configure the Application Gateway?

Answer options:

Deploy three separate Application Gateways, one pinned to each zone, and use Traffic Manager to route between them.

Deploy a single Application Gateway and select Zones 1, 2, and 3 during creation.

Deploy a single Application Gateway and configure it as 'Zone-pinned' to Zone 1.

Deploy an Azure Front Door instance in front of the Application Gateway.

How to approach this question

Understand that modern Azure PaaS services (like App Gateway v2) natively support zone redundancy if configured during creation.

Full Answer

B.Deploy a single Application Gateway and select Zones 1, 2, and 3 during creation.✓ Correct

Deploy a single Application Gateway and select Zones 1, 2, and 3 during creation.

Azure Application Gateway v2 SKU natively supports zone redundancy. When you create the Application Gateway, you can select multiple Availability Zones (e.g., 1, 2, and 3). Azure will then automatically provision and manage the gateway instances across those selected zones. If one zone goes down, the Application Gateway instances in the other zones continue to process traffic, ensuring high availability.

Common mistakes

Thinking you need multiple App Gateways. Azure manages the underlying instances across zones for you within a single App Gateway resource.

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