What connectivity do you need to be able to connect remotely to this instance?

You can seamlessly join an EC2 instance to your directory domain.

What connectivity do you need to be able to connect remotely to this instance?
A . You must have IP connectivity to the instance from the network you are connecting from.
B . You must have the correct encryption keys to connect to the instance remotely.
C . You must have enough bandwidth to connect to the instance.
D . You must use MFA authentication to be able to connect to the instance remotely.

Answer: A

Explanation:

You can seamlessly join an EC2 instance to your directory domain when the instance is launched using the Amazon EC2 Simple Systems Manager. If you need to manually join an EC2 instance to your domain, you must launch the instance in the proper region and security group or subnet, then join the instance to the domain. To be able to connect remotely to these instances, you must have IP connectivity to the instances from the network you are connecting from. In most cases, this requires that an Internet gateway be attached to your VPC and that the instance has a public IP address.

Reference: http://docs.aws.amazon.com/directoryservice/latest/admin-guide/join_a_directory.html