TAILIEUCHUNG - Networking: A Beginner’s Guide Fifth Edition- P37

Networking: A Beginner’s Guide Fifth Edition- P37:I have run into many people over the years who have gained good even impressive working knowledge of PCs, operating systems, applications, and common problems and solutions. Many of these people are wizards with desktop computers. | 162 Networking A Beginner s Guide Disaster Recovery Plans A disaster recovery plan is a document that explores how a network recovers from a disaster that either imperils its data or stops its functioning. A company s external financial auditors often require annual disaster recovery plans because of the data s importance to the business and the effect that such a network failure would have on a company. Moreover disaster recovery plans are also important because they force the manager of the network to think through all possible disaster scenarios. By taking these scenarios into account the manager can make more effective plans to protect the network s data from loss and to restore full operations of the business as quickly as possible. As mentioned at the beginning of this chapter planning for disaster recovery and managing the company s backup systems are a network manager s two most important jobs. Most companies do not have extremely long disaster recovery plans. For a single network of up to several hundred nodes and 15 or so servers such a plan usually consists of about 10 to 20 pages or fewer although its length varies depending on the complexity of the company s network operations. Fortune 500 companies for instance may have disaster recovery plans that are several hundred pages long when all sites are considered in aggregate. One strategy to keep disaster recovery plans concise and to maximize their usefulness is to focus on problems that while remote are at least somewhat likely to occur. Alternatively you can focus on disaster results what happens rather than trying to cover disaster causes why it happened. Focusing your plan on disaster results means contemplating problems such as loss of a single server loss of the entire server room loss of all of the customer service workstation computers and so forth without worrying about the possible disasters that might cause those results. The following sections discuss the minimum key issues that a disaster .

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