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Unit Contents
Overview 
In this unit we review the Physical Layer components that we first covered in Introduction to Networking. We also move on to explain the deeper technical details of these media. Because unshielded twisted pair (UTP) cable is the dominant medium in most new networks, Lesson 5 explains the technical details of the connector cables that link devices in a UTP-based network. Each type of transmission medium (copper cable, optical fiber, or radio) has its own particular strengths and weaknesses. Thus, there is no single best way to connect computers. Lesson 4 presents some of the main factors to consider when choosing a network's transmission medium.
Terms You Should Know
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