AWS Certified Solutions Architect – Professional (SAP-C02) — Question 279

A company has a new application that needs to run on five Amazon EC2 instances in a single AWS Region. The application requires high-throughput, low-latency network connections between all of the EC2 instances where the application will run. There is no requirement for the application to be fault tolerant.

Which solution will meet these requirements?

Answer options

• A. Launch five new EC2 instances into a cluster placement group. Ensure that the EC2 instance type supports enhanced networking.
• B. Launch five new EC2 instances into an Auto Scaling group in the same Availability Zone. Attach an extra elastic network interface to each EC2 instance.
• C. Launch five new EC2 instances into a partition placement group. Ensure that the EC2 instance type supports enhanced networking.
• D. Launch five new EC2 instances into a spread placement group. Attach an extra elastic network interface to each EC2 instance.

Correct answer: A

Explanation

A cluster placement group packs instances close together inside a single Availability Zone, which enables workloads to achieve the low-latency and high-throughput network performance required. Combining this with enhanced networking ensures the highest packet-per-second performance and lowest network jitter. In contrast, spread and partition placement groups are designed to reduce correlated failures for fault tolerance, which is not a requirement here.