Information system ralph CH04

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Fundamentals of Information Systems, Fifth Edition Chapter Telecommunications, the Internet, Intranets, and Extranets Principles and Learning Objectives • A telecommunications system has many fundamental components that must be carefully selected and work together effectively to enable people to meet personal and organization objectives – Identify and describe the fundamental components of a telecommunications system including media and hardware devices Fundamentals of Information Systems, Fifth Edition Principles and Learning Objectives (continued) – Identify several network types and describe the uses and limitations of each – Name three basic processing alternatives for organizations that require two or more computer systems and discuss their fundamental features Fundamentals of Information Systems, Fifth Edition Principles and Learning Objectives (continued) • The Internet and the Web provide a wide range of services, some of which are effective and practical for use today, others are still evolving, and still others will fade away from lack of use – Briefly describe how the Internet works, including alternatives for connecting to it and the role of Internet service providers – Describe how the World Wide Web works and the use of Web browsers, search engines, and other Web tools – Identify and briefly describe several applications associated with the Internet and the Web Fundamentals of Information Systems, Fifth Edition Principles and Learning Objectives (continued) • Because use of the Internet and World Wide Web is becoming universal in the business environment, management, service and speed, privacy, and security issues must continually be addressed and resolved – Outline a process and identify tools used to create Web content – Define the terms intranet and extranet and discuss how organizations are using them – Identify several issues associated with the use of networks Fundamentals of Information Systems, Fifth Edition An Overview of Telecommunications • Telecommunications – The electronic transmission of signals for communications • Telecommunications medium – Any material substance that carries an electronic signal to support communications between a sending and receiving device Fundamentals of Information Systems, Fifth Edition Fundamentals of Information Systems, Fifth Edition Channel Bandwidth • The rate at which data is exchanged • Broadband communications – A telecommunications system that can exchange data very quickly Fundamentals of Information Systems, Fifth Edition Communications Media • Guided transmission media types – Many utilities, cities, and organizations are experimenting with broadband over power lines (BPL) • Wireless technologies – Broadcast of communications in one of three frequency ranges: microwave, radio, and infrared – Near Field Communication (NFC) – Bluetooth – Ultra wideband (UWB) – Wi-Fi Fundamentals of Information Systems, Fifth Edition Fundamentals of Information Systems, Fifth Edition 10 Web Log (Blog), Video Log (Vlog), and Podcasting • Web log (blog) – Web site that people can create and use to write about their observations, experiences, and feelings • Video log (vlog) – Video content placed on the Internet using the same overall approach as a blog • Podcast – Audio broadcast over the Internet Fundamentals of Information Systems, Fifth Edition 42 Chat Rooms • Facility that enables two or more people to engage in interactive “conversations” over the Internet • Internet Relay Chat (IRC) – Requires participants to type their conversation rather than speak Fundamentals of Information Systems, Fifth Edition 43 Internet Phone and Videoconferencing Services • Internet phone service – Enables you to communicate with others around the world • Internet videoconferencing – Supports both voice and visual communications Fundamentals of Information Systems, Fifth Edition 44 Social Networks • Provide Web-based tools for users to: – Share information about themselves with people on the Web • MySpace and Facebook – Popular social networking sites • Linked In – Social network that allows professionals to find others who work in the same field Fundamentals of Information Systems, Fifth Edition 45 Content Streaming • Method for transferring multimedia files, radio broadcasts, and other content over the Internet so that the data stream plays continuously Fundamentals of Information Systems, Fifth Edition 46 Shopping on the Web • Bot (intelligent agent) – Software tool that searches the Web for information, products, or prices – Can find the best prices or features from multiple Web sites Fundamentals of Information Systems, Fifth Edition 47 Web Auctions • A way to connect buyers and seller • Web auction sites – Place where businesses are growing their markets or reaching customers for a low cost per transaction Fundamentals of Information Systems, Fifth Edition 48 Music, Radio, Video, and TV on the Internet • Hot growth areas on the Internet – Music, radio, and video • Radio broadcasts are now available on the Internet • Video and TV are also becoming available on the Internet Fundamentals of Information Systems, Fifth Edition 49 Office on the Web • Internet office – Web site that contains files, phone numbers, e-mail addresses, an appointment calendar, and more – Allows your desktop computer, phone books, appointment schedulers, and other important information to be with you wherever you are Fundamentals of Information Systems, Fifth Edition 50 Other Internet Services and Applications • Internet services are constantly emerging – Libraries – Critical information during times of disaster or terrorism – Critical medical information – Translation – Distance learning Fundamentals of Information Systems, Fifth Edition 51 Intranets and Extranets • Intranet – Internal corporate network built using Internet and World Wide Web standards and products • Extranet – Network that links selected resources of the intranet with customers, suppliers, or other business partners • Virtual private network (VPN) – Secure connection between two points on the Internet • Tunneling – VPNs transfer information by encapsulating traffic in IP packets and sending the packets over the Internet Fundamentals of Information Systems, Fifth Edition 52 Net Issues • Management issues – No centralized governing body controls the Internet • Service and speed issues – Traffic volume on company intranets is growing even faster than the Internet • Privacy, fraud, security, and unauthorized Internet sites – Unauthorized and unwanted Internet sites are also problems some companies face Fundamentals of Information Systems, Fifth Edition 53 Summary • Telecommunications – Electronic transmission of signals for communications, including telephone, radio, and television • Telecommunications media – Guided transmission media and wireless media • Network types – – – – Personal area network (PAN) Local area network (LAN) Metropolitan area network (MAN) Wide area network (WAN) Fundamentals of Information Systems, Fifth Edition 54 Summary (continued) • The Internet started with ARPANET • Internet service provider – Any company that provides access to the Internet • The Web – A collection of independently owned computers that work together as one • Web programming languages – Java, JavaScript, VBScript, ActiveX, and Hypertext Preprocessor Fundamentals of Information Systems, Fifth Edition 55 Summary (continued) • Intranet – Internal corporate network built using Internet and World Wide Web standards and products • Extranet – Network that links selected resources of the intranet of a company with its customers, suppliers, or other business partners Fundamentals of Information Systems, Fifth Edition 56 ... Fundamentals of Information Systems, Fifth Edition 14 Fundamentals of Information Systems, Fifth Edition 15 Fundamentals of Information Systems, Fifth Edition 16 Fundamentals of Information Systems,... wideband (UWB) – Wi-Fi Fundamentals of Information Systems, Fifth Edition Fundamentals of Information Systems, Fifth Edition 10 Fundamentals of Information Systems, Fifth Edition 11 Telecommunications... telecommunications network Fundamentals of Information Systems, Fifth Edition 23 Communications Software • Network operating system (NOS) – Systems software that controls the computer systems and devices on a
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