Fundamental Security Concepts

In  an ever-evolving world of technology, security and data privacy are of paramount importance. This chapter will address some of the basic concepts of IT infrastructure security. In order to secure a system, the key task is to identify and classify the information assets and define a security framework.

This chapter will cover what security means to network and system administrators. It will also explore how to build a secure network, incorporating the security principles defined in your framework. 

Let's get started with network infrastructure security. We will cover the following topics in this chapter:

• Why security?
• Building blocks of information security
• Computer security
• Network security
• Internet security
• Security issues, threats, and attacks