CHAPTER 2

Layers of a Network

In this chapter, you will learn about

• The Open Systems Interconnection (OSI) model, its seven layers, and how they determine the way data moves across a network

• The characteristics of Physical Layer transmission media, including copper, fiber, and wireless media

• The Physical Layer and how it pertains to networked AV systems, with specifics about twisted-pair (CAT) cabling and fiber-optic cabling

• Long-distance communication media at the Physical Layer

• The Data Link Layer, how it pertains to networked AV systems, and why AV-specific protocols are important

Now that you understand the underlying concepts of a packet-switched network, it’s time to start delving into what makes it function. In this chapter, ...

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