Multi-ip has a lot of regular application, SEO, EDM, VPN agent, etc. Can effectively solve the cost, a lot of time to rent a high configuration server through the XEN, the hyper - V is divided into VPS, virtualization technologies such as Shared a server will greatly reduce the cost, so it need more IP collocation. For example, the proxy server, which USES server bandwidth to speed up the game, changes the local IP address, and does not have a high requirement for server hardware configuration.