©brooks/cole, 2003 chapter 6 computer networks. ©brooks/cole, 2003 understand the rationale for...
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©Brooks/Cole, 2003
Chapter 6
ComputerNetworks
©Brooks/Cole, 2003
Understand the rationale for the existence of networks.Understand the rationale for the existence of networks.
Distinguish between the three types of networks: LANs, MANs,Distinguish between the three types of networks: LANs, MANs,and WANs.and WANs.
After reading this chapter, the reader should After reading this chapter, the reader should be able to:be able to:
OOBJECTIVESBJECTIVES
List different connecting devices and the OSI layers in whichList different connecting devices and the OSI layers in whicheach device operates.each device operates.
Understand client-server models. Understand client-server models.
Understand the OSI model and TCP/IP.Understand the OSI model and TCP/IP.
©Brooks/Cole, 2003
NETWORKS, NETWORKS, LARGE AND SMALLLARGE AND SMALL
NETWORKS, NETWORKS, LARGE AND SMALLLARGE AND SMALL
6.16.1
©Brooks/Cole, 2003
OSI MODELOSI MODELOSI MODELOSI MODEL
6.26.2
©Brooks/Cole, 2003
The Open Systems The Open Systems Interconnection modelInterconnection model
is a theoretical model that is a theoretical model that shows howshows how
any two different systems can any two different systems can communicate with each other.communicate with each other.
Note: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
CATEGORIES CATEGORIES OFOF
NETWORKSNETWORKS
CATEGORIES CATEGORIES OFOF
NETWORKSNETWORKS
6.36.3
©Brooks/Cole, 2003
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
CONNECTINGCONNECTINGDEVICESDEVICES
CONNECTINGCONNECTINGDEVICESDEVICES
6.46.4
©Brooks/Cole, 2003
Figure 6-7
Connecting devices
©Brooks/Cole, 2003
Figure 6-8 Repeater
©Brooks/Cole, 2003
Repeaters operate at the first Repeaters operate at the first layer of thelayer of theOSI model.OSI model.
Note:Note:
©Brooks/Cole, 2003
Figure 6-9
Bridge
©Brooks/Cole, 2003
Bridges operate at the first Bridges operate at the first two layerstwo layers
of the OSI model. of the OSI model.
Note:Note:
©Brooks/Cole, 2003
Figure 6-10
Switch
©Brooks/Cole, 2003
Routers operate at the first Routers operate at the first three layersthree layers
of the OSI model. of the OSI model.
Note: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 INTERNETTHE INTERNETANDAND
TCP/IPTCP/IP
THE INTERNETTHE INTERNETANDAND
TCP/IPTCP/IP
6.56.5
©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 6-18
Email address
©Brooks/Cole, 2003
Figure 6-19
TELNET
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Figure 6-20
URL
©Brooks/Cole, 2003
Figure 6-21
Browser
©Brooks/Cole, 2003
Figure 6-22
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