A server that is hosted by a company and only allows one company to lease and access it is called a dedicated server. It is "dedicated" to the one client and is not shared with any other clients. Dedicated servers usually allow the client to choose what operating system is installed on it and what type of hardware. In some cases, as an add-on service, the hosting company will provide administration services for the client, freeing the client from having to worry about it.

In most cases, the hosting company performs most, if not all, of the maintenance on the dedicated server, including operating system updates and updates to any installed applications, monitoring of the server and applications, firewall maintenance, intrusion detection, data backups, disaster recovery, and a number of other maintenance services. The hosting company also employs strict security measures to safeguard their clients' data and comply with all security policies and audit guidelines. Clients usually pay a monthly, quarterly, or yearly fee to use a dedicated server, which can save money over hosting, maintaining, and managing their own servers on-site.

Using a dedicated hosting service offers the benefits of high performance, security, email stability, and control. Due to the relatively high price of dedicated hosting, it is mostly used by websites that receive a large volume of traffic.It is strongly recommended for hyip players to invest in a program that use this type of hosting (dedicated server). 

Source : http://www.computerhope.com