You are developing an application that is going to make use of Docker containers. Traffic needs to be routed based on demand to the application. Dynamic host port mapping would be used for the docker containers. Which of the following two options would you use for the distribution of traffic to the Docker containers?

Answer options:

A.AWS Application Load Balancer
B.AWS Network Load Balancer
C.AWS Route 53
D.AWS Classic Load Balancer

Answer – A & B
The AWS Documentation mentions the following.
Application Load Balancers offer several features that make them attractive for use with Amazon ECS services.
Application Load Balancers allow containers to use dynamic host port mapping (so that multiple tasks from the same service are allowed per container instance).
Application Load Balancers support path-based routing and priority rules (so that multiple services can use the same listener port on a single Application Load Balancer).
Network Load Balancers do support dynamic host port mapping.
https://docs.aws.amazon.com/AmazonECS/latest/developerguide/load-balancer-types.html#nlb
Options D is invalid since the Application Load balancer is ideal when you have the requirement for path-based routing.
Option C is incorrect since this is used for DNS Routing.
For more information on Service Load Balancing, please refer to the below URL-
https://docs.aws.amazon.com/AmazonECS/latest/developerguide/service-load-balancing.html