Answer (D) is correct . A disaster recovery plan may include a contract with an external contingency facility vendor. Depending on the organization’s needs, the contingency facility may be a hot site or a cold site. A hot site is an arrangement with a vendor for a fully operational facility that is configured to the user’s specific needs and that will be available within 24 hours. A hot site may also be fixed or portable and is recommended for an organization that cannot afford for its computer system to be down for even one day.
Answer (A) is incorrect because An uninterruptible power system is a system that is fully protected by a generator or battery backup to prevent data destruction and downtime from electrical power outages.
Answer (B) is incorrect because A parallel system exists if a company maintains an identical system to the main system.
Answer (C) is incorrect because A cold site is a cheaper alternative to a hot site. It is a shell facility suitable for the quick installation of computer equipment. It provides a prebuilt, environmentally controlled area with raised flooring, electrical power, and appropriate plumbing.
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