Slide introduction to information ssstem 10th obien chap006 eng

James A O’Brien Introduction to Information Systems Chapter Telecommunications and Networks Irwin/McGraw-Hill James A O’Brien Introduction to Information Systems 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 Irwin/McGraw-Hill James A O’Brien Introduction to Information Systems Trends in Telecommunications Industry Trends More vendors, carriers, alliances, an services, accelerated by deregulation & Internet growth Extensive Technology TrendsInternet, interconnected local & global digital networks, improved transmission channels electronic commerce, enterprise collaboration, ApplicationMore Trends online business operations and strategic advantage in markets Irwin/McGraw-Hill James A O’Brien Introduction to Information Systems Telecommunications Strategic Capabilities Overcome Overcome Geographic Barriers: Capture information about business business transactions transactions from from remote remote locations locations Overcome Overcome Time Barriers: Provide Provide information information to to remote remote locations locations immediately immediately after it is requested Overcome Overcome Cost Barriers: Reduce the cost of more traditional means means of of communications communications Overcome Overcome Structural Barriers: Support linkages for competitive advantage advantage Irwin/McGraw-Hill James A O’Brien Introduction to Information Systems Internet Applications Telnet E-mail E-Commerce Internet Relay Chat Irwin/McGraw-Hill Popular Uses of the Internet File Transfer Protocol (FTP) Search Engines James A O’Brien Introduction to Information Systems Basic Components in a Telecommunications Network Telecommunications Processors Telecommunications Telecommunications Software Software PCs, NCs, and Other Terminals Irwin/McGraw-Hill Telecommunications Channels and Media Computers James A O’Brien Introduction to Information Systems Wide Area Networks Irwin/McGraw-Hill James A O’Brien Introduction to Information Systems Local Area Networks PC PC PC Shared Database and Software Packages Network Network Server Server Shared Printer PC Irwin/McGraw-Hill PC Internetwork Processor to Other Networks James A O’Brien Introduction to Information Systems Other E-Business Networks Irwin/McGraw-Hill The Internet Router Intranet Server Extranet Fire wall Fire wall Router Intranet Server Host System James A O’Brien Introduction to Information Systems Client/Server Networks and Network Computing Client User Interface Application Processing Network Network Server Server Application Control Distributed Database Host Host System System Superserver Superserver Central database control Heavy duty processing NetPC Application Server Server DB Server Server Browser-based User Interface Irwin/McGraw-Hill Web OS DBMS Application Software James A O’Brien 1 Introduction to Information Systems Telecommunications Communication Media • • • • Twisted Pair Coaxial Cable Fiber Optics Terrestrial Microwave Irwin/McGraw-Hill • Communication Satellites • Cellular Technologies • Wireless LAN James A O’Brien Introduction to Information Systems Telecommunications Processors and Software • • • • Network Operating System Modems Multiplexers Telecommunications Monitor Internetwork Processors Middleware – Switches Network Management Software – Routers – Hubs – Gateways • Fire walls Irwin/McGraw-Hill James A O’Brien Introduction to Information Systems Network Topologies Irwin/McGraw-Hill James A O’Brien Introduction to Information Systems Network Protocols: The OSI Architecture Application ApplicationLayer Layer Presentation PresentationLayer Layer Seven Layers of the OSI Communications Architecture Irwin/McGraw-Hill Session SessionLayer Layer Transport TransportLayer Layer Network NetworkLayer Layer Data DataLink LinkLayer Layer Physical PhysicalLayer Layer James A O’Brien The Internet’s TCP/IP Application Layer Application or Process Layer Presentation Layer Session Layer Host-to-Host Transport Layer Transport Layer Internet Protocol (IP) Network Layer Network Interface Data Link Layer Physical Layer Physical Layer Irwin/McGraw-Hill OSI Model Introduction to Information Systems James A O’Brien Introduction to Information Systems Chapter Summary • Organizations are becoming internetworked enterprises that use the Internet, intranets, and other telecommunications networks to support EBusiness • 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 Irwin/McGraw-Hill James A O’Brien Introduction to Information Systems 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) Irwin/McGraw-Hill James A O’Brien Introduction to Information Systems Chapter Summary (cont) • Key telecommunications network alternatives include telecommunications media, processors, software, channels, and architectures Irwin/McGraw-Hill ... Irwin/McGraw-Hill James A O’Brien Introduction to Information Systems Network Topologies Irwin/McGraw-Hill James A O’Brien Introduction to Information Systems Network Protocols: The OSI Architecture... Channels and Media Computers James A O’Brien Introduction to Information Systems Wide Area Networks Irwin/McGraw-Hill James A O’Brien Introduction to Information Systems Local Area Networks PC... O’Brien Introduction to Information Systems Internet Applications Telnet E-mail E-Commerce Internet Relay Chat Irwin/McGraw-Hill Popular Uses of the Internet File Transfer Protocol (FTP) Search Engines