Hot Site / Cold Site
A hot site is a commercial disaster recovery service that enables an organization to sustain its computing and network abilities in the event of a massive equipment failure. A hot site provides the equipment and office facilities needed for the organization to continue its operations.
A cold site is a commercial disaster recovery service that provides only the office space required for an organization to continue its operations. Cold sites are less expensive than hot sites, but not as convenient because the organization must supply its own equipment.