Launching EC2 instances using EC2-Classic and EC2-VPC
Your EC2 instance receives a private IP address from the EC2-Classic range each time it's started, whereas your instance receives a static private IP address from the address range in EC2-VPC. You can only have one private IP address in EC2-Classic, but in EC2-VPC, we have multiple private IP addresses. If you attach an EIP (Elastic IP) to EC2-Classic instance, it will get dissociated when you stop the instance. But for VPC EC2 instance, it remains associated even after you stop it. We can create subnets, routing tables, and Internet gateways in VPC. For on-premise connectivity, we need VPC.
Note
There are different VPC options available, depending on whether you created your AWS account before ...
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