Exam AWS Certified Solutions Architect - Professional topic 1 question 202 discussion

A: EC2 in private subnet?

A. Launch the EC2 instances with only the public subnet.

The option that will not be needed in this setup is: A. Launch the EC2 instances with only the public subnet. In a setup with Elastic Beanstalk, Elastic Load Balancing (ELB), and a Virtual Private Cloud (VPC) with public and private subnets, the EC2 instances should be launched in the private subnet. This is because the organization's requirement states that all the EC2 instances should have a private IP. Therefore, option A is not needed as it suggests launching the EC2 instances with only the public subnet, which would not meet the requirement of having private IP addresses for the instances.

http://docs.aws.amazon.com/elasticbeanstalk/latest/dg/AWSHowTo-vpc.html

A. Why only in the public subnet? You can still receive in private with NAT in public.

the question is very tricky and annoying. it took me time. it asked: "which of these will UNecessary" -> so A. the other options are necessary more or less

Yes it is A

Likely the question is wrong, B should be answer. But A answer seems to have typo.

D is correct

So am I the only one that is picking up that answer A says 'public subnet' not private subnet? Which is wrong! A. Launch the EC2 instances with only the public subnet.