AWS Solutions Architect Associate Practice Test

Instances in AWS are provisioned within Availability Zones, which are distinct locations within a region designed to be insulated from failures in other Availability Zones. Each region consists of multiple Availability Zones, allowing users to deploy applications in a highly available and fault-tolerant manner.

When you launch an instance, you actually select an Availability Zone within a specific region. This structure ensures that if one Availability Zone faces issues, other zones can continue to operate normally, thus enhancing the reliability of services.

Regions encompass broader geographic areas, and while they do provide the overall framework for resource deployment, it is the Availability Zones that provide the necessary isolation and redundancy for instances. Provisions do not take place globally as you cannot launch instances outside of the specified regional framework, and private networks refer to networking configurations which operate within these zones but do not pertain to the core provisioning of instances themselves.