chap9 - Ethernet Network Fundamentals Chapter 9 Modified by...

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© 2006 Cisco Systems, Inc. All rights reserved. Cisco Public ITE I Chapter 6 1 Ethernet Network Fundamentals – Chapter 9 Modified by Tony Chen 04/22/2009
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© 2006 Cisco Systems, Inc. All rights reserved. Cisco Public ITE 1 Chapter 6 2 Notes: If you see any mistake on my PowerPoint slides or if you have any questions about the materials, please feel free to email me at chento@cod.edu . Thanks! Tony Chen College of DuPage Cisco Networking Academy
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© 2006 Cisco Systems, Inc. All rights reserved. Cisco Public ITE 1 Chapter 6 3 Objectives Learning Objectives Upon completion of this chapter, you will be able to: Describe the evolution of Ethernet Explain the fields of the Ethernet Frame Describe the function and characteristics of the media access control method used by Ethernet protocol Describe the Physical and Data Link layer features of Ethernet Compare and contrast Ethernet hubs and switches Explain the Address Resolution Protocol (ARP)
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© 2006 Cisco Systems, Inc. All rights reserved. Cisco Public ITE 1 Chapter 6 4 Historic Ethernet The foundation for Ethernet technology was first established in 1970 with a program called Alohanet. –Alohanet was a digital radio network designed to transmit information over a shared radio frequency between the Hawaiian Islands. –Alohanet required all stations to follow a protocol in which an unacknowledged transmission required re-transmitting after a short period of waiting. The techniques for using a shared medium in this way were later applied to wired technology in the form of Ethernet. –Ethernet was designed to accommodate multiple computers that were Interconnected on a shared bus topology . The first version of Ethernet incorporated a media access method known as Carrier Sense Multiple Access with Collision Detection (CSMA/CD). –CSMA/CD managed the problems that result when multiple devices attempt to communicate over a shared physical medium.
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© 2006 Cisco Systems, Inc. All rights reserved. Cisco Public ITE 1 Chapter 6 5 Ethernet The term "ether" in "Ethernet" is said to have come from "luminiferous aether," the medium that 19th century physicists thought responsible for the propagation of light.
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© 2006 Cisco Systems, Inc. All rights reserved. Cisco Public ITE 1 Chapter 6 6 Ethernet – Standard and Implementation Ethernet operates in the lower two layers of the OSI model: the Data Link layer and the Physical layer. Robert Metcalfe and his coworkers at Xerox designed the 1 st Ethernet LAN more than thirty years ago. –The first Ethernet standard was published in 1980 by a consortium of Digital Equipment Corporation, Intel, and Xerox (DIX). In 1985, the Institute of Electrical and Electronics Engineers (IEEE) standards committee for Local and Metropolitan Networks published standards for LANs. These standards start with the number 802.
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chap9 - Ethernet Network Fundamentals Chapter 9 Modified by...

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