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321450 Management of Information Technology

321450 Management of Information Technology. Chapter 8 Internet and Information Systems Asst. Prof. Wichai Bunchua E-mail : wichai@buu.ac.th http:// www.informatics .buu.ac.th/~wichai. Why Learn About the Internet?. Internet is an important part of most people’s lives

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321450 Management of Information Technology

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  1. wichai@buu.ac.th

  2. 321450Management of Information Technology Chapter 8 Internet and Information Systems Asst. Prof. Wichai Bunchua E-mail : wichai@buu.ac.th http://www.informatics.buu.ac.th/~wichai

  3. Why Learn About the Internet? Internet is an important part of most people’s lives Individuals can investigate career opportunities Businesses sell and advertise online Employees can communicate with coworkers and bosses wichai@buu.ac.th 3

  4. The Internet Internet: ? wichai@buu.ac.th 4

  5. The Internet Internet: a collection of interconnected networks, all freely exchanging information ARPANET Ancestor of the Internet Project started by the U.S. Department of Defense (DoD) in 1969 wichai@buu.ac.th 5

  6. The Internet Table 1: A Brief History of the Internet wichai@buu.ac.th 6

  7. Internet Hosts wichai@buu.ac.th 7

  8. How the Internet Works Internet transmits data from one computer (called a host) to another If the receiving computer is on a network to which the first computer is directly connected, it can send the message directly If the receiving computer is not on a network to which the sending computer is connected, the sending computer relays the message to another computer that can forward it Data is passed in chunks called packets wichai@buu.ac.th 8

  9. How the Internet Works (continued) wichai@buu.ac.th 9

  10. How the Internet Works Transmission Control Protocol (TCP) Transport-layer protocol that most Internet applications use with IP Internet Protocol (IP): communication standard that enables traffic to be routed from one network to another as needed Backbone One of the Internet’s high-speed, long-distance communications links wichai@buu.ac.th 10

  11. How the Internet Works (continued) Internet Corporation for Assigned Names and Numbers (ICANN) Responsible for managing IP addresses and Internet domain names Has authority to resolve domain name disputes Cyber-squatters Register domain names in the hope of selling them to corporations or people wichai@buu.ac.th 11

  12. Domain Name Registrations (2000-) wichai@buu.ac.th 12

  13. How the Internet Works (continued) Accessing the Internet Connect via LAN Server Connect via Dial-up Connect via High-Speed Service Connect Wirelessly wichai@buu.ac.th

  14. How the Internet Works (continued) wichai@buu.ac.th

  15. Internet Service Providers Any company that provides individuals or organizations with access to the Internet Most charge a monthly fee wichai@buu.ac.th 15

  16. Internet Service Providers (continued) wichai@buu.ac.th

  17. The World Wide Web wichai@buu.ac.th 17

  18. The World Wide Web Collection of tens of millions of server computers that work together as one in an Internet Hyperlink Highlighted text or graphics in a Web document that, when clicked, opens a new Web page wichai@buu.ac.th 18

  19. The World Wide Web The World Wide Web was developed by Tim Berners-Lee at CERN, The European Organization for Neuclear Research in Geneva[Center Europeane pour la RechercheNucleaire] wichai@buu.ac.th 19

  20. WWW Growth wichai@buu.ac.th 20

  21. The World Wide Web (continued) Hypertext Markup Language (HTML) Standard page description language for Web pages HTML tags Let the browser know how to format text Extensible Markup Language (XML) Markup language for Web documents containing structured information Cascading Style Sheet (CSS) File or portion of an HTML file that defines the visual appearance of content in a Web page wichai@buu.ac.th 21

  22. The World Wide Web (continued) Web Documents index.html HTML Documents/ Linked Files http://www.buu.ac.th/index.html REQUEST HTTP The Internet HTTP HTTPD Web Server Web Site HTML Document index.html Client Web Browser Web Page Home Page wichai@buu.ac.th

  23. Web Browsers Web browser: software that creates a unique, hypermedia-based menu on a computer screen, providing a graphical interface to the Web Menu consists of graphics, titles, and text with hypertext links Popular Web browsers: Microsoft Internet Explorer, Netscape Navigator, Mozilla Firefox, Apple Computer’s Safari Uniform Resource Locator (URL) An assigned address on the Internet for each compute wichai@buu.ac.th 23

  24. Web Browsers (continued) wichai@buu.ac.th

  25. Search Engines and Web Research Search engine: Web search tool Examples: Yahoo.com, Google.com Most search engines are free Searches can use words, such as AND and OR to refine the search Meta-search engine: submits keywords to several individual search engines and returns results from all these search engines wichai@buu.ac.th 25

  26. Search Engines and Web Research (continued) Table 6 Popular Search Engines wichai@buu.ac.th 26

  27. 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 Other languages Asynchronous JavaScript and XML (AJAX) Hypertext Preprocessor (PHP) Adobe Flash and Microsoft Silverlight wichai@buu.ac.th 27

  28. Web Programming Languages (continued) Figure : Downloading an Applet from a Web Server wichai@buu.ac.th 28

  29. Developing Web Content Popular tools for creating Web pages and managing Web sites: Adobe Dreamweaver, Microsoft Expression Web, and Nvu Popular publishing options: ISPs, free sites, and Web hosting Mash-up Process of mixing two or more hip-hop songs into one song wichai@buu.ac.th 29

  30. Developing Web Content Suggestions for creating a Web page Computer must be linked to a Web server Web browser program needed to view the HTML pages you create Options for designing the Web page Write your copy with a word processor, and use an HTML converter to convert the page into HTML format Use an HTML editor to write text and add HTML tags Edit an existing HTML template to meet your needs Use an ordinary text editor and type the start and end tags for each item wichai@buu.ac.th 30

  31. Internet and Web Applications The types of Internet and Web applications available are vast and ever expanding wichai@buu.ac.th 31

  32. Business Uses of the Web In 1991, Commercial Internet Exchange (CIX) Association was established to allow businesses to connect to the Internet Firms use the Internet for many types of applications wichai@buu.ac.th 32

  33. Internet and Web Applications Search engines and Web research Search engines Have become important to businesses as a tool to drive visitors to the business’ Web site SEO has become a valuable marketing tool wichai@buu.ac.th

  34. wichai@buu.ac.th

  35. E-Mail, Instant Messaging, and Video Chat E-mail No longer limited to simple text messages Can embed sound and images Can attach files Instant messaging Online, real-time communication between two or more people who are connected to the Internet wichai@buu.ac.th 35

  36. Internet Cell Phones and Handheld Computers Cell phones connected to the Internet allow people to search for information, buy products, and chat with business associates and friends Short Message Service (SMS) or texting Brief text messages can be sent between two or more cell phone users Handheld computers and other devices are connected to the Internet using phone lines or wireless connections wichai@buu.ac.th 36

  37. Career Information and Job Searching Search engines Good starting point for searching for specific companies or industries Job sites www.directmarketingcareers.com www.monster.com www.hotjobs.com www.careerbuilder.com wichai@buu.ac.th 37

  38. Telnet, SSH, and FTP Telnet Network protocol that enables users to log on to networks remotely over the Internet Secure Shell (SSH) Provides Telnet functionality through a more secure connection File Transfer Protocol (FTP) Supports file transfers between a host and a remote computer wichai@buu.ac.th 38

  39. SSH Secure Shell File Transfer Upload Download wichai@buu.ac.th

  40. Web Log (Blog), Video Log (Vlog), and Podcasting Web log (blog) Web site that people create and use to write about their observations, experiences, and feelings on a wide range of topics Podcast Audio broadcast over the Internet An audio blog wichai@buu.ac.th 40

  41. Usenet and Newsgroups Usenet Uses e-mail to provide a centralized news service Topic are called newsgroups Protocol that describes how groups of messages can be stored on and sent between computers wichai@buu.ac.th 41

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  43. Chat Rooms Enable 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 wichai@buu.ac.th 43

  44. Internet Phone and Videoconferencing Services Internet phone service Relatively inexpensive, especially for international calls Voice-over-IP (VoIP) technology Network managers can route phone calls and fax transmissions over the same network they use for data Internet videoconferencing Supports both voice and visual communications wichai@buu.ac.th 44

  45. Social Networks Facebook Provides an application development platform so that technically proficient members can create applications to run within Facebook The U.S. intelligence community Is adopting social networking to share information among operatives and analysts Twitter Allows members to report on what they are doing throughout the day wichai@buu.ac.th

  46. Facebook Accounts wichai@buu.ac.th

  47. Media Sharing YouTube Allows members to post homemade video content Flickr Allows members to upload photos to their own personal online photo album and choose photos to share with the community wichai@buu.ac.th

  48. Social Bookmarking Purpose To provide a view of the most popular Web sites, videos, blog articles, or other Web content at any given moment Popular social bookmarking sites del.icio.us Digg wichai@buu.ac.th

  49. Content Streaming Method for transferring multimedia files, radio broadcasts, and other content over the Internet Enables users to browse large files in real time wichai@buu.ac.th

  50. Shopping on the Web Amazon Shorts Has stories that vary in length from 2,000 to 10,000 words Bot (intelligent agent) Software tool that searches the Web for information, products, or prices wichai@buu.ac.th 50

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