What is required to achieve gigabit network throughput on EC2? You already selected cluster-compute, 10GB instances with enhanced networking, and your workload is already network-bound, but you do not see 10 gigabit speeds.

Answer options:

A.Enable biplex networking on your servers. So packets are non-blocking in both directions and there’s no switching overhead.
B.Ensure the instances are in different VPCs, so you don’t saturate the Internet Gateway on any one VPC.C.Select PIOPS for your drives and mount several so that you can provision sufficient disk throughput.
D.Use a placement group for your instances, so the instances are physically near each other in the same Availability Zone.

Answer – D
A placement group is a logical grouping of instances within a single Availability Zone. Placement groups are recommended for applications that benefit from low network latency, high network throughput, or both. To provide the lowest latency and the highest packet-per-second network performance for your placement group, choose an instance type that supports enhanced networking.
For more information on Placement Groups, please visit the below URL:
http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/placement-groups.html