It provides access to all Internet content in their accounts by webmasters often via a software FTP or file manager. For this, he maintains computers connected 24 hours to 24 to the Internet (the web servers for example) via a connection at high speed (several hundreds of Mbps), which are installed software: HTTP server (usually Apache), server messaging, database .
Categories Accommodation
Most offers of accommodation are grouped into broad categories:
The accommodation shared or shared: Each server hosts several sites, up to several thousands, and this in order to share the costs. The main advantage is price, the main disadvantage is that the client is not shared by the server administrator, it is often dependent on the goodwill of the host if he wants a particular technology.
In some configurations, shared web hosting, the user can be administrator of a virtual server where the site is deployed. However, he continues to share system resources with other clients pooled.
Accommodations dedicated: The customer then has its own server, and can generally be administered as desired, which is the main advantage of such offers. The supplier server remains the server owner. The disadvantages are: much higher price than shared web hosting, and the skills needed to administer the machine correctly.
The dedicated virtual hosting via a hypervisor, which offers customers the flexibility of a dedicated (the client manages his machine at his convenience) by providing a virtual machine that uses some of the resources of a server (physical) by techniques of virtualization (computer).
Dedicated hostings called “managed”, with “managed hosting dedicated server” or “turnkey” The client has its own server, but the technicians involved in the host management system. This solution is perfect if you have any technical knowledge on its head. Simply submit its site. This type of accommodation is seeking to adapt to the needs.
The roommate: The host is in its central data processing, space available to the customer, so it can place its own server inside (Mostly in cabinets or racks appointed special ” bays). The host also offers the customer a power cord and cable ethernet so it can feed its server and connect to the Internet. This system is supposed to be cheaper, since the location of the server is not understood, but systems and security badges at the centers of data processing can be more expensive than renting.

Most hosting companies are paying, there are some free, most often it is to call tenders for their paid services, most feature rich and powerful.

Businesses face many challenges at the hosting infrastructure and applications. Torn between performance requirements for their vital activity and constraints in terms of spending and investment, they are turning more often to focus pooling solutions and industrialization. The virtualization, the “cloud computing” applications and how SaaS is increasingly considered as alternatives they should consider carefully.