What is a consideration when deploying an application across multiple Availability Zones to ensure high availability?
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Applications must be designed to handle the failure of an Availability Zone without human intervention, automatically redistributing traffic to instances in operational zones.
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Availability Zones automatically manage the state of applications, enabling stateful applications to fail over without any data loss or manual intervention.
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Deploying applications to more Availability Zones than necessary will linearly increase the availability and reliability of the application.
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Using diverse Availability Zones for different application components eliminates the need for synchronous data replication.
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Applications should rely on a single Availability Zone for mission-critical deployments to concentrate the resources and strengthen the zone's resilience.
Deploying an application across multiple Availability Zones is a standard practice to ensure high availability. Each Availability Zone operates on physically separate hardware and infrastructure, which are independently powered and isolated from failures in other zones. Leveraging multiple Availability Zones allows applications to remain available despite potential issues in a single zone. The incorrect choices do not correctly deal with the distribution in multiple zones or they overstate the capabilities of zones, such as the automatic failover of stateful applications, which requires additional configuration and is not a default behavior of Availability Zones.
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