AWS is available in multiple locations worldwide.
These locations are composed of regions and Availability Zones.
A region is a named set of AWS resources in the same separate geographic area.
Each region has multiple, isolated locations known as Availability Zones.
Each region is completely independent and is designed to be completely isolated
from the other regions
Each Availability Zone is isolated, but the Availability Zones in a region
are connected through low-latency links. Availability Zones are physically
separated within a typical metropolitan region.