Using multiple Availability Zones provides high availability and fault tolerance for applications by distributing resources within a region across physically separated data centers. This ensures that if one Availability Zone becomes unavailable or compromised, others can continue to operate, reducing the potential impact on the application's users. The incorrect answers mention increasing performance and reducing latency, which are benefits related to edge locations and caching respectively, rather than the primary purpose of Availability Zones.
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What are Availability Zones in AWS?
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How does using multiple AZs affect application deployment?
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What happens if an entire Availability Zone goes down?