AWS Regions

• AWS Regions are clusters of data centers
• Example of regions: us-east-1, eu-west-1, etc.
• Most services provided by AWS are regions scoped. This means a data for a service used in one region is not replicated in another region

AWS Availability Zones (AZ)

• AWS Regions are divided into availability zones
• Each region has between 2 and 6 AZs. Usually they have 3
• Each AZ is one or more discrete data center with redundant power, networking an connectivity
• All AZs from a region are geographically separated from each other
• Even if they are separated, they have high bandwidth connection between them