Chapter 6.7 - Networking with EC2

Question 1

What is ENI?

Answer 1

Elastic Network Interface

For basic day-to-day networking with speeds up to 10 Gbps.

Example: Perhaps you need a separate management network from your production network or a separate logging network, and you need to do this at a low cost. In this scenario, use multiple EINs for each network.

Question 2

What is EN?

Answer 2

Enhanced Networking

For when you need speeds between 10 Gbps and 100 Gbps.

Anywhere you need reliable, high throughput.

Question 3

What is EFA?

Answer 3

Elastic Fabric Adapter

For when you need to accelerate High Performance Computing (HPC) and machine learning applications, or if you need to do an OS-bypass.

If you see a scenario question mentioning HPC or ML asking what network adapter to choose, chose EFA.

Question 4

ENA vs VF?

Answer 4

In ANY scenario based question, choose ENA (Elastic Network Adapter) over VF interface (Intel 82599 Virtual Function (VF) Interface).