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Virtual private clouds (VPCs) are easy‐to‐use AWS network organizers and great tools for organizing your infrastructure. Because it's so easy to isolate the instances in one VPC from whatever else you have running, you might want to create a new VPC for each one of your projects or project stages. For example, you might have one VPC for early application development, another for beta testing, and a third for production (see Figure 2.1).

FIGURE 2.1 A multi‐VPC infrastructure for a development environment

Adding a simple VPC that doesn't incorporate a network address translation (NAT) gateway (docs.aws.amazon.com/AmazonVPC/latest/UserGuide/vpc-nat-gateway.html) or VPN access (docs.aws.amazon.com/vpn/latest/s2svpn/VPC_VPN.html) won't cost you anything. You'll learn much more about all this in Chapter 4, “Amazon Virtual Private Cloud.”