Chapter 21

Ethernet Switching


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

  • How do the OSI model Layer 1 and Layer 2 function in an Ethernet network?

  • How are the Ethernet sublayers related to the frame fields?

  • What is the Ethernet MAC address?

  • How does a switch build its MAC address table and forward frames?

Key Terms

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


Institute of Electrical and Electronic Engineers (IEEE)

contention-based access method

collision fragment

runt frame

jumbo frame

baby giant frame

cyclic redundancy check (CRC)

Introduction (21.0)

Hey, it’s Webster again! Marcy and Vincent are beginning to see the value of Bob’s ...

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