An ECS cluster running on docker containers is launched using AWS Fargate Launch type. The Operations Team is looking for traffic logs between each of the tasks and engaging you to collect these logs.
Which is the correct interface on which VPC flow logs can be applied to meet this requirement?

Answer options:

A.Apply VPC flow logs on the docker virtual interface to monitor traffic between each task.
B.Apply VPC flow logs on Amazon EC2 instance secondary ENI to monitor traffic between each task.
C.Apply VPC flow logs on ENI of the Amazon ECS task to monitor traffic between each task.
D.Apply VPC flow logs on Amazon EC2 instance primary ENI to monitor traffic between each task.

Correct Answer: C
Default networking mode for AWS Fargate launch type is awsvpc, in which each Amazon ECS task launched on the instance gets a separate ENI. For monitoring traffic between tasks, VPC Flow Logs can be applied at the ENI of each task. 
Options A, B & D is incorrect as these are invalid options on applying VPC flow logs in the case of AWS Fargate launch type.
For more information on Amazon Fargate task networking, refer to the following URL,
https://docs.aws.amazon.com/AmazonECS/latest/userguide/fargate-task-networking.html