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The CISA® Prep Guide: Mastering the Certified Information Systems Auditor Exam by John Kramer

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5.6. Evaluating Alternative Business Processing Plans and Associated Training

There are many acceptable and alternative arrangements that can be used to provide for the businesses processing needs. First, let's discuss various data center processing site alternatives. There are four basic types of recovery facilities, all with their own costs and downtime constraints to consider:

Cold site. This approach involves outfitting an environmentally conditioned and prewired computer room with co-located office space that is suitable for the necessary processing, with equipment that is either salvaged or shipped from the vendors and used to recreate the processing environment. The advantages are clearly cost related because minimal subscription costs for the space are required and the agreements maintained with the vendors to promise the provision of equipment and set up or configuration services when needed and then on a best case basis are minimal. Configurations would not need to be maintained and updated and continuous synchronization with the existing facilities is not an issue because the business provides and installs the equipment. The disadvantages are the time to prepare for use, which could be weeks. Equipment availability and set up also are potential sticking points. Costs will add up quickly for on-demand services in potentially short supplies at the time of a widespread disaster. Having configuration diagrams and set up maps in hard copy forms will be critical to the success, ...

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