Eleventh Edition 1 Introduction to Information Systems Essentials for the Internetworked E-Business Enterprise Irwin/McGraw-Hill Copyright © 2002, The McGraw-Hill Companies, Inc. All rights reserved. C h a p t e r James A. O’Brien 6 Telecommunications and Networks

Eleventh Edition James A. O’Brien 2 Introduction to Information Systems Irwin/McGraw-Hill Copyright © 2002, The McGraw-Hill Companies, Inc. All rights reserved. Identify several major developments and trends in the industries, technologies, and business applications of telecommunications and Internet technologies. Provide examples of the business value of Internet, intranet, and extranet applications. Identify the basic components, functions, and types of telecommunications networks used in business. Explain the functions of major types of telecommunications network hardware, software, media, and services. Chapter Objectives

Eleventh Edition James A. O’Brien 3 Introduction to Information Systems Irwin/McGraw-Hill Copyright © 2002, The McGraw-Hill Companies, Inc. All rights reserved. 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

Eleventh Edition James A. O’Brien 4 Introduction to Information Systems Irwin/McGraw-Hill Copyright © 2002, The McGraw-Hill Companies, Inc. All rights reserved. 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 locations immediately after it is requested. Overcome Time Barriers: Provide information to remote locations immediately 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.

Eleventh Edition James A. O’Brien 5 Introduction to Information Systems Irwin/McGraw-Hill Copyright © 2002, The McGraw-Hill Companies, Inc. All rights reserved. Internet Applications Surf and Internet Chat and Discussion Forums Download and Computer Search Engines E-Commerce Transfer Protocol (FTP) and Telnet Popular Uses of the Internet Popular Uses of the Internet

Eleventh Edition James A. O’Brien 6 Introduction to Information Systems Irwin/McGraw-Hill Copyright © 2002, The McGraw-Hill Companies, Inc. All rights reserved. Business Value from e-Commerce Applications Increase Customer Loyalty & Retention Reduce the Cost of Doing Business Generate New Revenue Sources Attract New Customers Deriving Business Value from e-Commerce Applications Deriving Business Value from e-Commerce Applications Develop New Markets & Channels Develop New Web-based Products

Eleventh Edition James A. O’Brien 7 Introduction to Information Systems Irwin/McGraw-Hill Copyright © 2002, The McGraw-Hill Companies, Inc. All rights reserved. Basic Components in a Telecommunications Network Telecommunications Software Telecommunications Software PCs, NCs, and Other Terminals Computers Telecommunications Channels and Media Telecommunications Processors

Eleventh Edition James A. O’Brien 8 Introduction to Information Systems Irwin/McGraw-Hill Copyright © 2002, The McGraw-Hill Companies, Inc. All rights reserved. Wide Area Networks

Eleventh Edition James A. O’Brien 9 Introduction to Information Systems Irwin/McGraw-Hill Copyright © 2002, The McGraw-Hill Companies, Inc. All rights reserved. California Norway Belgium Pennsyl- vania Pennsyl- vania Manitoba British Columbia British Columbia Chile Ontario Japan Dominican Republic Dominican Republic Wide Area Network Wide Area Network WAN

Eleventh Edition James A. O’Brien 10 Introduction to Information Systems Irwin/McGraw-Hill Copyright © 2002, The McGraw-Hill Companies, Inc. All rights reserved. Local Area Networks Network Server Network Server Shared Database and Software Packages Shared Printer PC Internetwork Processor to Other Networks

Eleventh Edition James A. O’Brien 11 Introduction to Information Systems Irwin/McGraw-Hill Copyright © 2002, The McGraw-Hill Companies, Inc. All rights reserved. Other E-business Networks Router Intranet Server Host System Intranet Server The Internet Fire wall Router Extranet

Eleventh Edition James A. O’Brien 12 Introduction to Information Systems Irwin/McGraw-Hill Copyright © 2002, The McGraw-Hill Companies, Inc. All rights reserved. Client Server Networking Client Systems Servers Host Systems/ Superservers Host Systems/ Superservers

Eleventh Edition James A. O’Brien 13 Introduction to Information Systems Irwin/McGraw-Hill Copyright © 2002, The McGraw-Hill Companies, Inc. All rights reserved. Client/Server Networks and Network Computing Network Server Network Server Host System Superserver Host System Superserver Client User Interface Application Processing Application Control Distributed Database Central database control Heavy duty processing Server NetPC Browser-based User Interface Web OS Application Software Application DBMS DB

Eleventh Edition James A. O’Brien 14 Introduction to Information Systems Irwin/McGraw-Hill Copyright © 2002, The McGraw-Hill Companies, Inc. All rights reserved. Telecommunications Communication Media Twisted Pair Coaxial Cable Fiber Optics Terrestrial Microwave Communication Satellites Cellular Technologies Wireless LAN

Eleventh Edition James A. O’Brien 15 Introduction to Information Systems Irwin/McGraw-Hill Copyright © 2002, The McGraw-Hill Companies, Inc. All rights reserved. Telecommunications Processors and Software Modems Multiplexers Internetwork Processors –Switches –Routers –Hubs –Gateways Fire walls Network Operating System Telecommunications Monitor Middleware Network Management Software

Eleventh Edition James A. O’Brien 16 Introduction to Information Systems Irwin/McGraw-Hill Copyright © 2002, The McGraw-Hill Companies, Inc. All rights reserved. Network Topologies

Eleventh Edition James A. O’Brien 17 Introduction to Information Systems Irwin/McGraw-Hill Copyright © 2002, The McGraw-Hill Companies, Inc. All rights reserved. The Internet’s TCP/IP Application or Process Layer Internet Protocol (IP) Host-to-Host Transport Layer Network Interface Physical Layer Application Layer Presentation Layer Session Layer Transport Layer Network Layer Data Link Layer Physical Layer OSI Model

Eleventh Edition James A. O’Brien 18 Introduction to Information Systems Irwin/McGraw-Hill Copyright © 2002, The McGraw-Hill Companies, Inc. All rights reserved. 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.

Eleventh Edition James A. O’Brien 19 Introduction to Information Systems Irwin/McGraw-Hill Copyright © 2002, The McGraw-Hill Companies, Inc. All rights reserved. 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).

Eleventh Edition James A. O’Brien 20 Introduction to Information Systems Irwin/McGraw-Hill Copyright © 2002, The McGraw-Hill Companies, Inc. All rights reserved. Chapter Summary (cont) Key telecommunications network alternatives include telecommunications media, processors, software, channels, and architectures.