Virtual servers are not correct server, but part of a server. On a server, depending on the computing power of any number of VPS will be installed. So they are no hardware component, but a software running on the main server. This also means that the virtual server must share the power of the main server. Each VPS gets its own IP and also can be configured as a real server.
Normally, the virtual server specific pieces of hardware are allocated fixed (memory). If the VPS needs more memory, and need the other virtual server their memory is not straight, it can be used in addition.
Advantages and Disadvantages of VPS
Who takes a web space set to a virtual server will, must also be aware that it is substantially more complex to configure this. However, all settings are self-made, so that eliminates annoying communication with the web space provider and additional fees for minor changes. However, the operator of the virtual server also for the security and backups is responsible.
What happens if the computing power is no longer sufficient for all VPS?
Since each VPS has its own IP, it can be moved quickly from one server to another, less loaded server. It is sort of precursor to the cloud.
Who are virtual server sense?
In fact anyone who thinks of himself to create a second web space. It should be considered in the more complex configuration. For beginners, make do with the basic configurations of web hosts, these models are too large. Nor should knowledge of server configuration, or at least the will, this, to learn to be present.