| At the onset, the physical server boots just like a | | | | Microsoft Virtual Server are examples of this. |
| regular computer or any system. It then runs a | | | | Virtual private servers (VPS) bridge the gap between |
| program enabling the virtual servers to boot from a | | | | dedicated hosting service and shared web hosting. |
| disk image on a certain virtual environment. This | | | | VPS makes it possible for clients to independently |
| means that virtual servers do not actually have direct | | | | work on the service in terms of software at a lesser |
| access to the hardware. | | | | expense. Customers can actually access the |
| VPS can be classified into two bases: software and | | | | operating system and install programs while the VPS |
| hardware. In Software-based virtualization, the virtual | | | | has its own copy of the system's processes. |
| machines share the same language and require the | | | | However, there might be restrictions imposed by |
| main system's resources. This is mostly used in a | | | | some VPS providers. This may include antivirus |
| web hosting facility because of the changes in real | | | | clients, firewalls and other software that is required |
| time, thus no need to restart its source. Examples of | | | | based on its virtual environment. Generally, virtual |
| which include Xen and OpenVZ. Hardware-based | | | | private servers are subjected to limited disk space, |
| virtualization however, involves the physical | | | | processor time, and random access memory. Shared |
| partitioning of resources where real time quota | | | | hosting environments are actually more rigid than that |
| changes are impossible. Modifications would require | | | | of dedicated VPS hosting. |
| restarting its virtual machine. VMware ESX Server and | | | | |