Chapter 30

Physical Layer

Objectives

Upon completion of this chapter, you will be able to answer the following questions:

  • What are the purpose and functions of the physical layer in the network?

  • What are characteristics of the physical layer?

  • What are the basic characteristics of copper cabling?

  • How is UTP cable used in Ethernet networks?

  • What is fiber-optic cabling and what are its main advantages over other media?

Key Terms

This chapter uses the following key terms. You can find the definitions in the Glossary.

American National Standards Institute (ANSI)

bandwidth

coaxial cable

crosstalk

electromagnetic interference (EMI)

encoding

fiber-optic cable

goodput

International Organization for Standardization (ISO)

International Telecommunication ...

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