Virtual web hosting is usually cheaper than the dedicated web hosting service. The virtual web hosting server, also called VPS, or Virtual Private Server, or Virtual Dedicated Server, is slightly slower that the fully dedicated web hosting server, as the VPS host many websites on a single server. In this type of web hosting service, even the IP address is shared.
In virtual web hosting, your website may be linked with some rouge websites which may hurt your website when that rogue website does unethical things and is banned. With that site banned by the search engines, it will affect your website too if your site shares the same IP address as that other site.
Usually, web servers have an operating system that helps in controlling it. However, virtual web server formed by partitioning a physical server in many servers in specific way so that each partition is a server in itself. These partitioned servers can have independent operating system of each partition.
Each partitioned virtual private server can also be rebooted independently. The physical server that contains all the VPS first boots in the normal way. This physical server then uses a program to boot each VPS inside a virtualization environment that is similar to an emulator. All these VPS are not directly accessed to any hardware on the physical server, so they are booted or started from a disk image.
VPS lies between the shared web hosting servers and the dedicated web hosting servers. Hence, VPS is costlier than the shared hosting, but cheaper than the dedicated hosting service. The VPS is generally slower because VPS produces some limitations as the random access memory (RAM), disk space, and processor time are shared by the virtualization clients use the single physical server with so many independent virtual operating systems being sun simultaneously. Hence, the dedicated hosting service is the answer to all these limitations for the serious users who need complete physical resources of the web server.
The VPS is also called the dynamic dedicated server as the VPS runs virtually, that is, without accessing the operating system of the physical web server.
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