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Irwin/McGraw-Hill Copyright © 2001, The McGraw-Hill Companies, Inc. All rights reserved.
I n t r o d u c t i o n t o I n f o r m a t i o n S y s t e m s Tenth EditionJames A. O’Brien
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I n t r o d u c t i o n t o I n f o r m a t i o n S y s t e m s Tenth EditionJames A. O’Brien
C h a p t e r
6
Irwin/McGraw-Hill Copyright © 2001, The McGraw-Hill Companies, Inc. All rights reserved.
Telecommunications and
Networks
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Irwin/McGraw-Hill Copyright © 2001, The McGraw-Hill Companies, Inc. All rights reserved.
I n t r o d u c t i o n t o I n f o r m a t i o n S y s t e m s Tenth EditionJames A. O’Brien
2 Chapter Objectives
• Identify several major developments and trends in the industries, technologies, and applications of telecommunications and networks.
• Identify the basic components, functions, and types of telecommunications networks.
• Explain the functions of major types of telecommunications network hardware and media.
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Irwin/McGraw-Hill Copyright © 2001, The McGraw-Hill Companies, Inc. All rights reserved.
I n t r o d u c t i o n t o I n f o r m a t i o n S y s t e m s Tenth EditionJames A. O’Brien
3 Trends in Telecommunications
More electronic commerce, enterprise collaboration,online business operations and strategic advantage in markets
More vendors, carriers, alliances, and network services, accelerated by deregulation & Internet growth
Extensive Internet, interconnected local & global digital networks, improved transmission channels
Industry Trends
Technology Trends
Application Trends
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Irwin/McGraw-Hill Copyright © 2001, The McGraw-Hill Companies, Inc. All rights reserved.
I n t r o d u c t i o n t o I n f o r m a t i o n S y s t e m s Tenth EditionJames A. O’Brien
4 Telecommunications Strategic Capabilities
Overcome Geographic Barriers: Capture information about business transactions from remote locations.Overcome Geographic Barriers: Capture information about business transactions from remote locations.
Overcome Time Barriers: Provide information to remote locationsimmediately after it is requested.Overcome Time Barriers: Provide information to remote locationsimmediately after it is requested.
Overcome Cost Barriers: Reduce the cost of more traditional means of communications.Overcome Cost Barriers: Reduce the cost of more traditional means of communications.
Overcome Structural Barriers: Support linkages for competitive advantage.Overcome Structural Barriers: Support linkages for competitive advantage.
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Irwin/McGraw-Hill Copyright © 2001, The McGraw-Hill Companies, Inc. All rights reserved.
I n t r o d u c t i o n t o I n f o r m a t i o n S y s t e m s Tenth EditionJames A. O’Brien
5 Internet Applications
E-mail
InternetRelayChat
Telnet
Search Engines
E-CommerceFile
TransferProtocol (FTP)
Popular Uses of the
Internet
Popular Uses of the
Internet
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Irwin/McGraw-Hill Copyright © 2001, The McGraw-Hill Companies, Inc. All rights reserved.
I n t r o d u c t i o n t o I n f o r m a t i o n S y s t e m s Tenth EditionJames A. O’Brien
6 Basic Components in a Telecommunications Network
TelecommunicationsSoftware
TelecommunicationsSoftware
1
2 3
4
52
PCs, NCs, and Other Terminals
ComputersTelecommunicationsChannels and Media
TelecommunicationsProcessors
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Irwin/McGraw-Hill Copyright © 2001, The McGraw-Hill Companies, Inc. All rights reserved.
I n t r o d u c t i o n t o I n f o r m a t i o n S y s t e m s Tenth EditionJames A. O’Brien
7 Wide Area Networks
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Irwin/McGraw-Hill Copyright © 2001, The McGraw-Hill Companies, Inc. All rights reserved.
I n t r o d u c t i o n t o I n f o r m a t i o n S y s t e m s Tenth EditionJames A. O’Brien
8 Local Area Networks
NetworkServer
NetworkServer
Shared Database and
Software Packages
SharedPrinter
PCPC
PC PC PC
Internetwork Processor to Other Networks
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Irwin/McGraw-Hill Copyright © 2001, The McGraw-Hill Companies, Inc. All rights reserved.
I n t r o d u c t i o n t o I n f o r m a t i o n S y s t e m s Tenth EditionJames A. O’Brien
9 Other E-Business Networks
Router
IntranetServer
Host System
IntranetServer
TheInternet
Fire wall
Fire wall
RouterExtranet
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Irwin/McGraw-Hill Copyright © 2001, The McGraw-Hill Companies, Inc. All rights reserved.
I n t r o d u c t i o n t o I n f o r m a t i o n S y s t e m s Tenth EditionJames A. O’Brien
10 Client/Server Networks and Network Computing
NetworkServer
NetworkServer
Host SystemSuperserverHost SystemSuperserver
Client
User InterfaceApplication Processing
Application ControlDistributed Database
Central database controlHeavy duty processing
ServerServer ServerServer
NetPC
Browser-basedUser Interface
Web OSApplication Software
Application
DBMS
DB
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Irwin/McGraw-Hill Copyright © 2001, The McGraw-Hill Companies, Inc. All rights reserved.
I n t r o d u c t i o n t o I n f o r m a t i o n S y s t e m s Tenth EditionJames A. O’Brien
11 Telecommunications Communication Media
• Twisted Pair
• Coaxial Cable
• Fiber Optics
• Terrestrial Microwave
• Communication Satellites
• Cellular Technologies
• Wireless LAN
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Irwin/McGraw-Hill Copyright © 2001, The McGraw-Hill Companies, Inc. All rights reserved.
I n t r o d u c t i o n t o I n f o r m a t i o n S y s t e m s Tenth EditionJames A. O’Brien
12 Telecommunications Processors and Software
• Modems• Multiplexers• Internetwork
Processors– Switches– Routers– Hubs– Gateways
• Fire walls
• Network Operating System
• Telecommunications Monitor
• Middleware• Network Management
Software
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Irwin/McGraw-Hill Copyright © 2001, The McGraw-Hill Companies, Inc. All rights reserved.
I n t r o d u c t i o n t o I n f o r m a t i o n S y s t e m s Tenth EditionJames A. O’Brien
13 Network Topologies
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Irwin/McGraw-Hill Copyright © 2001, The McGraw-Hill Companies, Inc. All rights reserved.
I n t r o d u c t i o n t o I n f o r m a t i o n S y s t e m s Tenth EditionJames A. O’Brien
14 Network Protocols: The OSI Architecture
Application LayerApplication Layer
Presentation LayerPresentation Layer
Session LayerSession Layer
Transport LayerTransport Layer
Network LayerNetwork Layer
Data Link LayerData Link Layer
Physical LayerPhysical Layer
SevenLayers ofthe OSICommunicationsArchitecture
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Irwin/McGraw-Hill Copyright © 2001, The McGraw-Hill Companies, Inc. All rights reserved.
I n t r o d u c t i o n t o I n f o r m a t i o n S y s t e m s Tenth EditionJames A. O’Brien
15 The Internet’s TCP/IP
Application orProcess Layer
Internet Protocol (IP)
Host-to-Host Transport Layer
Network Interface
Physical Layer
ApplicationLayer
PresentationLayer
SessionLayer
TransportLayer
NetworkLayer
Data LinkLayer
PhysicalLayer
OS
I M
od
el
Page 16
Irwin/McGraw-Hill Copyright © 2001, The McGraw-Hill Companies, Inc. All rights reserved.
I n t r o d u c t i o n t o I n f o r m a t i o n S y s t e m s Tenth EditionJames A. O’Brien
16 Chapter Summary
• Organizations are becoming internetworked enterprises that use the Internet, intranets, and other telecommunications networks to support E-Business.
• Telecommunications has entered a deregulated and fiercely competitive environment with many vendors, carriers, and services
• A major trend is towards pervasive use of the Internet and its technologies to build interconnected enterprise and global networks.
Page 17
Irwin/McGraw-Hill Copyright © 2001, The McGraw-Hill Companies, Inc. All rights reserved.
I n t r o d u c t i o n t o I n f o r m a t i o n S y s t e m s Tenth EditionJames A. O’Brien
17 Chapter Summary (cont)
• The major components of any telecommunications network are: – Terminals,– Telecommunications processors, – Communication channels, – Computers, and – Telecommunications software.
• There are several basic types of telecomm networks, including wide area networks (WANs) and local area networks (LANs).
Page 18
Irwin/McGraw-Hill Copyright © 2001, The McGraw-Hill Companies, Inc. All rights reserved.
I n t r o d u c t i o n t o I n f o r m a t i o n S y s t e m s Tenth EditionJames A. O’Brien
18 Chapter Summary (cont)
• Key telecommunications network alternatives include telecommunications media, processors, software, channels, and architectures.