An architect is designing a high-performance computing (HPC) cluster on AWS. The application requires sub-millisecond network latency and high packet-per-second performance between EC2 instances. Which THREE configurations are required to achieve this? (Select THREE)

Answer options:

Launch the EC2 instances in a Cluster Placement Group.

Launch the EC2 instances in a Spread Placement Group.

Enable Elastic Fabric Adapter (EFA) on the EC2 instances.

Use AWS Global Accelerator.

Use an EC2 instance type that supports Enhanced Networking (ENA).

Deploy the instances across multiple Availability Zones.

Attach Provisioned IOPS (io2) EBS volumes.

How to approach this question

Identify the EC2 features designed specifically for HPC networking.

Full Answer

A,C,E

For HPC, you need instances physically close (Cluster Placement Group), using high-performance network interfaces (ENA), and OS bypass for the lowest possible latency (EFA).

Common mistakes

Choosing Spread Placement Groups or Multi-AZ, which degrade network performance.

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