CHAPTER
2
OSI Reference Model
In this chapter, you will
• Learn about the functions of the OSI Reference Model layers
• Learn about encapsulation and de-encapsulation
Before you can successfully configure Cisco switches and routers, you must understand the basic networking concepts outlined in this chapter and advanced concepts discussed in later chapters. The Open Systems Interconnection (OSI) Reference Model is the best place to start, since it will help you understand how information is transferred between networking components. Of the seven layers in the OSI Reference Model, you should understand how the bottom four layers of the OSI model function, because most networking components function at these layers. This chapter covers how ...
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