In function, the virtual server is the same as the physical server. The price offered was much lower than the physical servers. But when the VPS is shared physical hadrware to another VPS, the performance is lowered and can be dependent on the workload of the OS that work on the same hardware. The virtual server is almost the same as the server that is directed to the development of time-sharing and multiprogramming in the past. Although resources are often shared with other servers, but under the model of time-sharing, VPS provides higher security level, depending on the type of virtualization used.
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