09. Availability Zones
ND0063 C1 L1 08 AWS AZs Video
An AWS Availability Zone (AZ) is a subsection of an AWS Region. A Region has multiple Availability Zones, and the exact number depends on the Region. An AZ is a physically independent building with its own power and network connectivity. AZs within a region are generally separated by several miles and connected to each other with extremely high bandwidth network connections.