Principles of Information Systems, Sixth Edition 1 The Internet, Intranets, and Extranets Chapter 7.
Business Computing 550 Lesson 4. Fundamentals of Information Systems, Fifth Edition Chapter 4...
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Transcript of Business Computing 550 Lesson 4. Fundamentals of Information Systems, Fifth Edition Chapter 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
Fundamentals of Information Systems, Fifth Edition 4
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 Edition 5
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 Edition 6
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 Edition 7
Fundamentals of Information Systems, Fifth Edition 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
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
Fundamentals of Information Systems, Fifth Edition 9
Fundamentals of Information Systems, Fifth Edition 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 Edition 11
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 12
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 13
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 14
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 15
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 16
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 17
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 Edition 18
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 19
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 Edition 20
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 21