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OSPF Network Design Solutions, Second Edition by Thomas M. Thomas

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Network Security

Network security has probably been one of the least considered aspects of network operation and design. As enterprise networks evolve, it has become an increasingly larger concern. Is this concern justified? The answer is a resounding yes—and the concerns are probably late in coming.

The Computer Security Institute conducts an annual Computer Crime and Security Survey. In 2002, the Institute reported that 90% of the companies polled detected computer security breaches within the last 12 months, and 80% acknowledged financial losses due to these breaches.

These are some staggering statistics. For example, most companies do not acknowledge such breaches unless they have to; it makes stockholders and employees nervous. Furthermore, ...

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