EagleBank plans to deploy an ExpressRoute gateway with zone redundancy. Which gateway SKU and deployment requirement should they choose to get a zone‑redundant ExpressRoute gateway across three availability zones?
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Correct answer: Provision an ErGw1AZ, ErGw2AZ, or ErGw3AZ SKU (the AZ variants) and deploy the gateway into a VNet that exists in an Azure region that supports availability zones; Azure will deploy gateway instances across zones..
Why this is the answer
To achieve a zone-redundant ExpressRoute gateway, you must select one of the zone-redundant gateway SKUs (ErGw1AZ, ErGw2AZ, or ErGw3AZ). These SKUs are specifically designed for zone redundancy. The gateway must be deployed into a VNet located in an Azure region that supports Availability Zones. Azure automatically distributes the gateway instances across the three Availability Zones within that region, ensuring high availability and resilience. The other options are incorrect because: ExpressRoute zone redundancy is not available on VPN gateway SKUs. Azure does provide single zone-redundant ExpressRoute gateway SKUs, making the option to create three separate single-AZ gateways unnecessary and inefficient. The Basic gateway SKU does not support Availability Zone redundancy for ExpressRoute.
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