Chapter 1. The Need for Network Security

Upon completion of this chapter, you will be able to perform the following tasks:

  • State the reasons for securing computer networks

  • Identify the basic security concepts

  • Define the four primary security threats

  • Explain the phases of an attack

  • Describe the approaches that attackers use to attack your network

  • Identify the common network attack points

  • Explain the common attack tools

  • Identify common security weaknesses on your network

Studies estimate that the current size of the Internet includes approximately 171 million hosts[1], with more than 665 million unique users[2]. Many companies rely heavily on electronic commerce for their livelihood. Integrating the Internet into business operations is cost-effective and ...

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