Amazon Virtual Private Cloud

Amazon's Virtual Private Cloud (VPC) service provides the networking layer of Elastic Compute Cloud (EC2). A VPC is a virtual network that can contain EC2 instances as well as network resources for other Amazon Web Services (AWS) services. Like a traditional network, a VPC consists of at least one range of contiguous Internet Protocol addresses. This address range is represented as a Classless Inter‐Domain Routing block. A subnet is a logical container within a VPC that holds VPC resources, including professional's EC2 instances. A subnet can exist within only one availability zone, which is roughly analogous to a relatively small geographic location such as a data center. An elastic network interface (ENI) allows an instance to communicate with other network resources, including AWS services, other instances, on‐premises servers, and the Internet. Enhanced networking offers higher network throughput speeds and lower latency than ENIs.