CCSP Self-Study: Cisco Secure Intrusion Detection System (CSIDS)

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 ...