title: What resources can reside in Amazon VPC?
body: <p>I'm kind of confused on the concept of VPC.</p>
  
  <p>I understand that when I create a EC2 instance(s), it automatically resides in a VPC, as EC2 is an virtual server instance. Actually, I understand how VPC settings work (I read all the official tutorial documents for VPC)!</p>
  
  <p>But what about other services or resources? S3, Lambda, RDS, ... Don't they have to be in a VPC either?</p>
  
  <p>Probably, I don't clearly understand what are VPCs for. Or, I have confusions about other managed services AWS provides. I want to get clear about what can be in VPC and what can't be.</p>