You have an existing application that runs on your premise and currently uses a non-relational database. Your team has decided to move the application to the cloud environment and the database to DynamoDB to use some of its features like scaling and data streaming. As per the management outline, for post-migration, all the communication between the application and the DynamoDB must be secure and scalable as the load will increase in the near future. EC2 instances should use their private IP addresses to access DynamoDB with no exposure to the public internet. What combinations can be used to design the migration and the post-migration activities, including the secure connection to DynamoDB? Select three options.

Answer options:

A.Migrate the on-premises application to the AWS EC2.
B.Use the HTTP endpoint of the DynamoDB to make sure all the communication is secure.
C.Connect your on-premises network to AWS using the VPN to access the DynamoDB via the VPC endpoints.
D.Host the application in an Auto Scaling group and enable Amazon DynamoDB auto-scaling.
E.Use the VPC gateway endpoint to connect with your DynamoDB.

Correct Answer: A, D, and E
Option A is CORRECT because the question is asking for migration and migrating the application to AWS. So, EC2 would be the best fit here.
Option B is INCORRECT because VPC gateway endpoints should be used. HTTP is incorrect.
Option C is INCORRECT because VPC endpoints are only accessible from EC2 instances inside a VPC. In case you are running it from your local premise, you will have to run it via a proxy that redirects to VPC based resource and then towards the endpoint.
Option D is CORRECT because an Auto Scaling group can dynamically scale the EC2 instances to maintain steady performance. In response to actual traffic patterns, Amazon DynamoDB auto scaling can dynamically adjust provisioned throughput capacity on your behalf.
Option E is CORRECT because VPC Endpoints provide a secure link to access the AWS resources from a VPC. Please check the reference in https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/vpc-endpoints-dynamodb.html.