A hot site is an off-premises location to allow a business to continue computer and network operations in the event of a computer or equipment disaster. A hot site has all the equipment necessary for a business to resume regular activities, including jacks for phones, backup data, computers and related peripherals. Hot sites can be part of a business continuity plan or disaster recovery plan, where plans and procedures are laid out in the event that normal business activities cannot go on as usual in the normal location.
If an enterprise's data center becomes inoperable, for instance, all data processing operations are moved to a hot site. A cold site is similar in concept but provides office space only, it's up to the customer to provide and install all the equipment needed to resume operations. It takes longer to get an enterprise in full operation after the disaster when a cold site is used.
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