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Part 6: Using Advanced Access Techniques > Securing Multiuser Network Applicati...

Chapter 24. Securing Multiuser Network Applications

Personal computer networking continues to be one of the fastest-growing areas in the PC marketplace. Many large organizations are downsizing database applications to personal computer networks. Downsizing means moving a database system that runs on a costly, large-scale computer, such as a mainframe, to smaller, lower-priced computers—usually server PCs running network operating systems, such as Windows NT Server 4.0. These networks use a dedicated server PC; PCs connected by the network to the server are called clients or workstations.

Small- to moderate-size organizations have discovered that installing a simple PC network can increase productivity and reduce the required investment in computing hardware. An organization needs to purchase only a single laser printer if all users can share it on a network. The cost of purchasing large fixed-disk drives is reduced when users share large files rather than keep multiple independent copies on local disk drives. Even families with more than one home PC are installing low-cost networks in order to share peripherals and files among family members.

Reducing capital expenditures and operating costs are the principal incentives for installing PC networks. In many cases, savings in the amount spent on peripheral equipment is the sole consideration in the decision to use a network. When you use a database application, however, productivity plays the most important role in the network decision-making process. The capability to share up-to-date information contained in a database file among many users is a strong incentive to install a PC network because it increases productivity. Increasing productivity with a networked database system can, in turn, reduce operating costs by many times the savings offered by the reduction of the investment when you share computer peripheral equipment.


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