A high-performance computing (HPC) application runs on a cluster of EC2 instances. The application requires extremely low latency and high throughput network communication between the instances. Which networking configuration should the architect use?

Answer options:

Launch the instances in a Spread Placement Group.

Launch the instances in a Cluster Placement Group and attach Elastic Fabric Adapters (EFA).

Use AWS Transit Gateway to route traffic between the instances.

Attach Elastic Network Interfaces (ENI) and use Jumbo Frames.

How to approach this question

Combine the placement strategy for physical proximity with the network adapter for HPC.

Full Answer

B.Launch the instances in a Cluster Placement Group and attach Elastic Fabric Adapters (EFA).✓ Correct

A Cluster Placement Group ensures instances are physically close in the data center. Elastic Fabric Adapter (EFA) provides lower and more consistent latency than standard ENIs by bypassing the OS kernel.

Common mistakes

Confusing Spread with Cluster placement groups.

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