This chapter covers the following subject

• Overview of Defense in Depth

As technology continues to advance, network perimeters are becoming difficult to define. A secure perimeter can be difficult to maintain and no longer offers sufficient protection for a network. The most effective way to maintain a secure network is to implement layers of defense. This chapter looks at the combination of security devices, policies, and procedures that combine to make up a layered defense.

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"Do I Know This Already?" Quiz

The purpose of the "Do I Know This Already?" quiz is to help you decide whether you really need to read the entire chapter. If you already intend to read the entire chapter, you do not necessarily need to answer these questions now.

The 10-question quiz, derived from the major sections in the "Foundation Topics" portion of the chapter, helps you determine how to spend your limited study time.

Table 3-1 outlines the major topics discussed in this chapter and the "Do I Know This Already?" quiz questions that correspond to those topics.

Table 3-1. "Do I Know This Already?" Foundation Topics Section-to-Question Mapping

Foundation Topics Section

Questions Covered in This Section

Overview of Defense in Depth

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