dedicated server is a computer available for one client by a host and which will be administered remotely via the Internet is administered by the host.
We talk about dedicated server hosting a website where the customer has the ability to manage not only the files on the server, but also the applications and their configurations and semi-dedicated server when the client has access to only files from the server.
When the server is shared by several clients talking about server hosting. In this case, the customer only has access to a disk space (typically a few tens of megabytes to several gigabytes) to enable it to manage its files in this limited space.
The dedicated servers are generally much more expensive a host. However, a dedicated server is often necessary to run large Web sites or sites requiring configuration.
A dedicated server is expected to deliver Web services (HTTP, FTP, database ...) without interruption. It is sometimes placed in a Datacenter (or Netcenter), which is a secure building (anti-fire systems, generators, redundant air conditioning, security access ...). The opportunity to change some parts hot without interruption of service is also planned.
The customer can administer its dedicated server remotely using various protocols as the operating system server (SSH for Linux and Terminal Server or Remote Desktop for Windows).
