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Availability Zones
An Availability Zone (AZ) is one or more discrete data centers with redundant power, networking, and connectivity in an AWS Region. AZs give customers the ability to operate production applications and databases that are more highly available, fault tolerant, and scalable than would be possible from a single data center.
An availability zone consists of multiple data centers, which are all equipped with independent power, cooling and networking infrastructure all housed in separate facilities. A region can have multiple availability zones, but no availability zones are shared with different regions.
https://www.techtarget.com/searchaws/definition/availability-zones#:~:text=An%20availability%20zone%20consists%20of,are%20shared%20with%20different%20regions.
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