答案:1、 cold backup siteA cold backup site is nothing more than an empty warehouse with all necessary connections for power and communication but nothing else.In the event of a disaster,a company has to first set up all necessary Equipment,and this is the least expensive option, but it also takes a relatively longer time.2、 hot back up siteIn contrast, A hot backup site is a fully equipped backup facility, having everything from office chairs to a one-to-one replication of the most current data.In the event of a disaster, all that has to be done is to relocate the employees to the backup site to continue working. However, this is a very expensive option.