An Availability Zone is an isolated location within an AWS Region that consists of one or more data centers with independent power, cooling, and networking. They are designed to be physically separate from each other to ensure high availability and fault tolerance within the Region. This allows you to design and operate applications and databases that are more highly available and fault-tolerant than would be possible from a single data center. The closest concept to a centralized data center that services all customers in a specific country is an AWS region. Nevertheless, a typical AWS region includes several data centers geographically close to each others, known as Availability Zones. A group of regions connected via low-latency network links worldwide is the definition of the AWS Global Infrastructure. A global network of edge locations used for content delivery network services is known as Amazon CloudFront.
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