Questions 34 to 36

Explanations for questions 34 to 36

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Question 34

A legacy tightly-coupled High Performance Computing (HPC) application will be migrated to AWS. Which network adapter type should be used?

  1. Elastic Network Interface (ENI)
  2. Elastic Network Adapter (ENA)
  3. Elastic Fabric Adapter (EFA)
  4. Elastic IP Address

Correct Answer: 3

Explanation: An Elastic Fabric Adapter is an AWS Elastic Network Adapter (ENA) with added capabilities. The EFA lets you apply the scale, flexibility, and elasticity of the AWS Cloud to tightly-coupled HPC applications. It is ideal for tightly coupled app as it uses the Message Passing Interface (MPI).

INCORRECT: “Elastic Network Interface (ENI)” is incorrect. The ENI is a basic type of adapter and is not the best choice for this use case.

INCORRECT: “Elastic Network Adapter (ENA)” is incorrect. The ENA, which provides Enhanced Networking, provides high bandwidth and low inter-instance latency, but it does not support the features for a tightly-coupled app that the EFA does.

CORRECT: “Elastic Fabric Adapter (EFA)” is the correct answer.

INCORRECT: “Elastic IP Address” is incorrect. An Elastic IP address is just a static public IP address, it is not a type of network adapter.

References:

https://aws.amazon.com/blogs/aws/now-available-elastic-fabric-adapter-efa-for-tightly-coupled-hpc-workloads/

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