Hosting service is a type of internet web hosting service through which individuals or organizations can make their website or WebPages accessible to others through internet The physical server typically runs a hypervisor which is tasked with creating, releasing, and managing the resources of “guest” operating systems, or virtual machines. These guest operating systems are allocated a share of resources of the physical server; typically in a manner in which the guest is not aware of any other physical resources save for those allocated to it by the hypervisor.
In a fully virtualized environment, the guest is presented with an emulated or virtualized set of hardware and is unaware that this hardware is not strictly physical. The hypervisor, in this case, must translate, map, and convert requests from the guest system into the appropriate resource requests on the host, resulting in significant overhead. Almost all systems can be virtualized using this method, as it requires no modification of the operating system; however a CPU supporting virtualization is required for most hypervisors that perform full virtualization.
In a paravirtualized environment, the guest is aware of the hypervisor and interfaces directly with the host system's resources, with the hypervisor implementing real-time access control and resource allocation. These results in near-native performance since the guest sees the same hardware as the host and can thus communicate with it natively.
Server hosting is of two types: virtual private server hosting and dedicated server hosting.
Virtual private servers bridge the gap between shared web hosting services and dedicated hosting services, giving independence from other customers of the VPS service in software terms but at less cost than a physical dedicated server. As a VPS runs its own copy of its operating system, customers have super user-level access to that operating system instance, and can install almost any software that runs on the OS. Certain software does not run well in a virtualized environment, such as virtualizes themselves; some VPS providers place further restrictions, but they are generally lax compared to those in shared hosting environments. Due to the number of virtualization clients typically running on a single machine, a VPS generally has limited processor time, RAM, and disk space.
Dedicated Server hosting solutions are designed to host resource-intensive websites or mission-critical applications that have outgrown shared hosting. Dedicated server bears its name because you lease your own dedicated server that is devoted solely to the hosting of your sites. Since you do not have to share the web server, it is capable of handling so many more functions simultaneously. For this reason, many larger corporations use dedicated servers, and every successful online business owner sets their goals toward an enterprise plan.
Almost all web hosting companies provide server hosting.