What is Colo or Colocation (Co-location)?
Colo or Colocation is used when multiple computer systems are used to deliver content to the Internet. The colocation company provides a dedicated facility with multiple Internet connections (for reliability and performance), air conditioning, and uninterruptable power. Colocation is typically sold by cabinet space or by the amount of space in a secured cage within a physically secure room. The cabinet space may be purchased as 1/8, 1/4, 1/4, or a full cabinet. Rack-mounted computer equipment is installed in the racks by the customer. The customer is responsible for all hardware and software maintenance. Internet bandwidth is provided by a dedicated Ethernet connection. Bandwidth is usually an additional charge on top of the cabinet space. For more information, please see this Wikipedia article on Colocation.