Cold sites have only basic infrastructure available and require the longest period of time to activate operations. They are also the cheapest option. Warm sites add hardware, and possible software, to the mix but do not have a current copy of the data running. They require hours to activate. Hot sites are up and running at all times and can assume operations at a moment’s notice. They are the most expensive option. Mobile sites are transportable on trailers and are a good choice for a last-minute recovery plan. They would work well in this scenario because Roger could bring a mobile site to their primary facility and use it to recover operations during the restoration effort at the primary site.