A fully dedicated server is a single machine leased to a single individual for exclusive use. Root access is generally a given in any dedicated environment, allowing the sever to be customized with applications that suit the user's needs. It is this root functionality that VPS hosting provides, but does so on a server that is still "shared" by other users. A dedicated server is completely at the disposal of a single users, to administer as they see fit. Due to the exclusive nature of a dedicated server, they generally require a larger capital investment than regular shared or VPS hosting plans.