You’re developing an application that will be hosted on an EC2 Instance. This will be part of an Autoscaling Group. The application needs to get the private IP of the instance to send it across to a controller-based application. Which of the following can be done to achieve this?

Answer options:

A.Query the Instance Meta Data
B.Query the Instance User Data
C.Have an Admin get the IP address from the console
D.Make the application run IFConfig

Answer – A
The application can use the application metadata to get the private IP address. The below snapshot from the AWS Documentation shows the information that you can get from the Instance metadata.
Option B is invalid because this cannot be used to get the IP address of the instance.
Option C is invalid because this is not an automated approach.
Option D is invalid because we don’t know the type of instance the application is running on.
For more information on AWS Instance Metadata, please refer to the below link-
https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ec2-instance-metadata.html