Which of the below mentioned statements will help George and Ray understand the availability zone (AZ) concept better?

George has launched three EC2 instances inside the US-East-1a zone with his AWS account. Ray has launched two EC2 instances in the US-East-1a zone with his AWS account.

Which of the below mentioned statements will help George and Ray understand the availability zone (AZ) concept better?
A . The instances of George and Ray will be running in the same data center
B . All the instances of George and Ray can communicate over a private IP with a minimal cost
C . All the instances of George and Ray can communicate over a private IP without any cost
D . The US-East-1a region of George and Ray can be different availability zones

View Answer

Answer: D

Explanation:

Each AWS region has multiple, isolated locations known as Availability Zones. To ensure that the AWS resources are distributed across the Availability Zones for a region, AWS independently maps the Availability Zones to identifiers for each account. In this case the Availability Zone US­East-1a where George’s EC2 instances are running might not be the same location as the US­East-1a zone of Ray’s EC2 instances. There is no way for the user to coordinate the Availability Zones between accounts.