AWS Availability Zone names may look like unique identifiers, but they are mapped to physical availability zones essentially at *random*. This means that **us-west-2b** in one account may be the same physical availability zone as **us-west-2a** in another account.
Read MoreAWS VPCs make it possible to establish private network connections across AWS accounts with VPC Peering, essentially merging the networks into one. However, there is another option for cross-account/cross-VPC network access, with a much smaller surface area.
Read More