Which configuration steps below is not required to setup AWS VPC with Auto Scaling?
Configure the Auto Scaling group with the VPC ID in which instances will be launched.
Configure the Auto Scaling Launch configuration with multiple subnets of the VPC to enable the Multi AZ feature.
Configure the Auto Scaling Launch configuration which does not allow assigning a public IP to instances.
Configure the Auto Scaling Launch configuration with the VPC security group.
Explanations:
Configuring the Auto Scaling group with the VPC ID is necessary as it determines the VPC in which the EC2 instances will be launched. This is a fundamental requirement for setting up Auto Scaling within a VPC.
Configuring the Auto Scaling Launch Configuration with multiple subnets is essential for enabling the Multi-AZ feature, which enhances availability and fault tolerance. Instances will be launched across different Availability Zones for redundancy.
While you can choose not to assign a public IP to instances in a VPC, it is not a requirement for setting up Auto Scaling. Whether instances have public IPs or not depends on the use case and network design, so this option does not need to be configured for Auto Scaling to work.
Configuring the Auto Scaling Launch Configuration with the VPC security group is required to control the inbound and outbound traffic for the instances launched within the Auto Scaling group, ensuring proper security measures are in place.
I calculate that the answer is:
Configure the Auto Scaling Launch configuration which does not allow assigning a public IP to instances.