business computing 550 lesson 4. fundamentals of information systems, fifth edition chapter 4...

Business Computing550

Lesson 4

Fundamentals of Information Systems, Fifth Edition

Chapter 4 Telecommunications, the Internet,

Intranets, and Extranets

Fundamentals of Information Systems, Fifth Edition 3

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


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


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


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



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

E-Mail, Instant Messaging, and Video Chat

• E-mail – No longer limited to simple text messages

• Instant messaging– Online, real-time communication between two or

more people who are connected to the Internet



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


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


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


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


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


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


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


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


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


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


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


business computing 550 lesson 4. fundamentals of information systems, fifth edition chapter 4...

Documents

internet slide

web documents

web portal

web sites

web scours

social web

web links

world wide web