Colocation is a term used to describe a certain type of IT Hosting service provided by telecommunication facilities and data centers to clients who own equipment and need to house it. There are different levels of Colocation – from colocation of a single standard desktop computer or rack server to rack enclosures (cabinets) used for colocation of multiple computing appliances.

The minimum services provided by the host facility (data center) to a client are: space, power feed, access to internet service, power and cooling. The facilities usually house IT equipment into rack cabinets (See “Server Cabinet”, “19-inch Rack” and “Tower Server Rack”), mount them into rack units, connect them to special types of power distribution units (PDU) and connect them to networking equipment (network switches) to provide them with Internet connectivity.

Reseller hosting is form of virtual hosting in which the account holder maintains a Master Shared Hosting Account, which has a special interface that allows one to create and manage a number of Shared accounts through a single management interface. The Reseller Hosting lacks a specific technical specification related to the host server, excluding the ability for managing a group of Shared accounts, setting own DNS and a few more features.

Reseller Account holder usually act as sellers of Shared Hosting Accounts. The most popular REseller Hosting management interface is cPanel’s WHM.