This topic describes the key concepts for VPCs.

Term Description
Virtual Private Cloud (VPC) A VPC is a private network established on Alibaba Cloud. VPCs are logically isolated from each other. You can create and manage cloud resources in your VPC, such as Elastic Compute Service (ECS), Server Load Balancer (SLB), and ApsaraDB for RDS instances.
VSwitch A VSwitch is a basic network device that connects different cloud resources in a VPC. When you create a cloud resource in a VPC, you must specify the VSwitch to which the cloud resource is connected.
VRouter A VRouter is a hub that connects all VSwitches in a VPC and serves as a gateway that connects the VPC to other networks. A VRouter also forwards network traffic according to the route entries in the route table.
Route table A route table is a list of route entries in a VRouter.
Route entry Each item in a route table is a route entry. A route entry specifies the next hop address for the network traffic directed to a destination CIDR block. Route entries are divided into system route entries and custom route entries.