AWS Certified SysOps Administrator – Associate (legacy) — Question 324

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?

Answer options

• 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

Correct answer: D

Explanation

AWS randomly maps physical Availability Zones to logical AZ names (such as US-East-1a) independently for each AWS account to ensure resource distribution. Because of this, US-East-1a in George's account may refer to a completely different physical data center than US-East-1a in Ray's account. Consequently, they cannot communicate via private IPs by default, making option D the correct statement.