©Brooks/Cole, 2003 Chapter 6 Computer Networks. ©Brooks/Cole, 2003 Understand the rationale for the existence of networks. Distinguish between the three.

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Presentation transcript:

©Brooks/Cole, 2003 Chapter 6 Computer Networks

©Brooks/Cole, 2003 Understand the rationale for the existence of networks. Distinguish between the three types of networks: LANs, MANs, and WANs. After reading this chapter, the reader should be able to: O BJECTIVES List different connecting devices and the OSI layers in which each device operates. Understand client-server models. Understand the OSI model and TCP/IP.

©Brooks/Cole, 2003 NETWORKS, LARGE AND SMALL NETWORKS, 6.1

©Brooks/Cole, 2003 OSI MODEL 6.2

©Brooks/Cole, 2003 The Open Systems Interconnection model is a theoretical model that shows how any two different systems can communicate with each other. Note:

©Brooks/Cole, 2003 Figure 6-1 The OSI model

©Brooks/Cole, 2003 Figure 6-2 Flow of data in the OSI model

©Brooks/Cole, 2003 CATEGORIESOFNETWORKSCATEGORIESOFNETWORKS 6.3

Figure 6-3 Categories of networks

©Brooks/Cole, 2003 Figure 6-4 LANs

©Brooks/Cole, 2003 Figure 6-5 MAN

©Brooks/Cole, 2003 Figure 6-6 WAN

©Brooks/Cole, 2003 CONNECTINGDEVICESCONNECTINGDEVICES 6.4

Figure 6-7 Connecting devices

©Brooks/Cole, 2003 Figure 6-8 Repeater

©Brooks/Cole, 2003 Repeaters operate at the first layer of the OSI model. Note:

©Brooks/Cole, 2003 Figure 6-9 Bridge

©Brooks/Cole, 2003 Bridges operate at the first two layers of the OSI model. Note:

©Brooks/Cole, 2003 Figure 6-10 Switch

©Brooks/Cole, 2003 Routers operate at the first three layers of the OSI model. Note:

©Brooks/Cole, 2003 Figure 6-11 Routers in an internet

©Brooks/Cole, 2003 Figure 6-12 Connecting devices and the OSI model

©Brooks/Cole, 2003 THE INTERNET ANDTCP/IP ANDTCP/IP 6.5

©Brooks/Cole, 2003 Figure 6-13 TCP/IP and OSI model

©Brooks/Cole, 2003 Figure 6-14 IP addresses in dotted-decimal notation

©Brooks/Cole, 2003 Figure 6-15 Client-server model

©Brooks/Cole, 2003 Figure 6-16 FTP

©Brooks/Cole, 2003 Figure 6-17 SMTP

©Brooks/Cole, 2003 Figure address

©Brooks/Cole, 2003 Figure 6-19 TELNET

©Brooks/Cole, 2003 Figure 6-20 URL

©Brooks/Cole, 2003 Figure 6-21 Browser

©Brooks/Cole, 2003 Figure 6-22 Categories of Web documents