the american vps server is a virtual private server, the english full name is "virtualprivateserver", commonly known as "vps". the us vps server uses virtual server mobile software (such as microsoft#s virtualserver, vmware#s esxserver, swsoft#s virtuozzo) to establish several small servers isolated from each other on a physical server. this kind of server (vps) also has its own computer operating system, and its operation and management method is exactly the same as that of a standalone server. because each us vps server can be restarted independently and has its own root access restrictions, clients, ip addresses, running memory, whole process, documentation, application software, system software library functions and its environment variables. the virtual-like dedicated server guarantees that all resources are private to customers, and provides customers with the most quality assurance of service items, so that customers can enjoy the service quality of independent servers at the price of cloud servers. each us vps server can be assigned an independent public ip address, independent computer operating system, independent super-large indoor space, independent running memory, independent cpu resources, independent program execution and independent system settings. in addition to assigning several cloud servers and endless company mailboxes, vps customers also have the function of an independent server, which can install programs independently and restart the server independently.