TAILIEUCHUNG - This chapter covers the following topic: Why Network Security Is Necessary?

In addition to the steps that an organization must take internally, nations and states face the need for providing privacy protection mechanisms to assure compliance with the safe harbor principles. There must also be recourse for individuals affected by noncompliance with the principles, and there must be consequences for an organization that violates safe harbor principles. Such mechanisms must include readily available and affordable independent recourse for an individual’s complaints and a method by which disputes can be investigated and resolved, as well as damages awarded where provided by the applicable law or private sector initiatives. There must also be documented procedures to verify that. | This chapter covers the following topics Why Network Security Is Necessary Secure Network Design Defined Categorizing Network Security Threats How Network Security Is Breached Network Security Policy and the Security Wheel C H A P T E R 1 Introduction to Network Security Computers networks and the Internet affect our lives every day. The fast-paced technologically savvy world we live in today is ever more dependent upon computers and networking. This did not happen overnight. Although the advances in computer technology are occurring at a very fast rate computers have been around for quite some time. In the beginning of this wave of computer technology many were unsure how far the wave was going to go. Some were hesitant to place much time and effort into something that might have turned out to be a fad. The number of people who were working on the advancement of computer technology was relatively small compared to today s widespread needs. In their small community computer enthusiasts were comfortable working with each other and they trusted each other. Participation was invited. In such a freewheeling environment the security of computers and the software that ran those computers was not given a very high priority. Much of the time security was an afterthought. Why Network Security Is Necessary Today the Internet is made up of tens of thousands of networks interconnected without boundary. Network security is essential in this environment because any organizational network is accessible from any computer in the world and therefore potentially vulnerable to threats from individuals who do not require physical access to it. In a recent survey conducted by the Computer Security Institute CSI 70 percent of the organizations polled stated that their network security defenses had been breached and that 60 percent of the incidents came from within the organizations themselves. While it is difficult to measure how many companies have had Internet-related security problems

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