A company plans to deploy a business-critical application on Amazon EC2 instances. This application should be scalable in a clustered environment. It supports high-performance computing (HPC) with consistency latency and highest throughput.
 How can this be achieved by meeting all the requirements above?

Answer options:

A.Configure the application on EC2 instances with enhanced networking enabled using the Elastic Network Adapter (ENA).
B.Configure the application on EC2 instances with enhanced networking enabled using the Elastic Fabric Adapter (EFA).
C.Configure the application on EC2 instances with enhanced networking enabled using the Elastic Network Interface (ENI).
D.Configure the application on EC2 instances with enhanced networking enabled using the Elastic Network (EN).

Answer: B
Option A is incorrect. Although ENA supports low latency and high throughput, it doesn’t meet high-performance requirements.
Option B is CORRECT. EFA supports low latency and high throughput with high-performance computing with the scalability, flexibility, and elasticity provided by the AWS Cloud.
 Option C is incorrect as ENI is used for creating management networks and deploying low budget solutions. This will not meet HPC and low latency requirements.
 Option D is incorrect. However, ENA or EN supports low latency and high throughput. But it doesn’t meet high-performance requirements.
References:
https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/using-eni.html
https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/efa.html
https://medium.com/@varunmanik1/aws-eni-vs-en-vs-efa-22250513590f
https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/enhanced-networking-ena.html