Business Computing 550 Lesson 4

Fundamentals of Information Systems, Fifth Edition Chapter 4 Telecommunications, the Internet, Intranets, and Extranets

Fundamentals of Information Systems, Fifth Edition3 Use and Functioning of the Internet Internet –Collection of interconnected networks, all freely exchanging information ARPANET –Ancestor of the Internet –A project started by the U.S. Department of Defense (DoD) in 1969 Internet Protocol (IP) –Enables traffic to be routed from one network to another as needed

Fundamentals of Information Systems, Fifth Edition4 Internet Service Providers Any company that provides individuals or organizations with access to the Internet Most charge a monthly fee Many ISPs and online services –Offer broadband Internet access through digital subscriber lines (DSLs), cable, or satellite transmission

Fundamentals of Information Systems, Fifth Edition5 The World Wide Web A hyperlink-based system that uses the client/server model Organizes Internet resources throughout the world into a series of linked file Tools: Web browser, Web portal, Web plug-ins Hypertext Markup Language (HTML) –Standard page description language for Web pages Extensible Markup Language (XML) –Markup language for Web documents containing structured information containing various elements

Web 2.0 and the Social Web The Web as a computing platform that supports software applications and the sharing of information between users Rich Internet application –Software that has the functionality and complexity of traditional application software, but does not require local installation and runs in a Web browser Fundamentals of Information Systems, Fifth Edition6

Web Programming Languages Java –Object-oriented programming language from Sun Microsystems based on C++ –Allows small programs (applets) to be embedded within an HTML document Fundamentals of Information Systems, Fifth Edition7

8 Internet and Web Applications Search engines and Web research –Search engine Enables you to find information on the Web Scours the Web with bots that follow all Web links in an attempt to catalog every Web page by topic Important businesses tool used to drive visitors to Web sites

, Instant Messaging, and Video Chat –No longer limited to simple text messages Instant messaging –Online, real-time communication between two or more people who are connected to the Internet Fundamentals of Information Systems, Fifth Edition9

10 Telnet, SSH, and FTP Telnet –Network protocol that enables users to log on to networks remotely over the Internet File Transfer Protocol (FTP) –Protocol that supports file transfers between a host and a remote computer

Fundamentals of Information Systems, Fifth Edition11 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 Edition12 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 Edition13 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 Edition14 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 Edition15 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 Edition16 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 Edition17 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 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 Edition18 Office on the Web Internet office –Web site that contains files, phone numbers, 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 Edition19 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

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 Edition20

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 Edition21