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Welcome to IST140

Welcome to IST140. Martin J. Crabtree – Instructor Fall 2007. Agenda. Greetings, syllabus, etc. What are you expecting from this course? What is the Internet? Internet definitions A bit on how the internet works Transmission Control Protocol (TCP) Internet Protocol (IP) Domains

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Welcome to IST140

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  1. Welcome to IST140 Martin J. Crabtree – Instructor Fall 2007

  2. Agenda • Greetings, syllabus, etc. • What are you expecting from this course? • What is the Internet? • Internet definitions • A bit on how the internet works • Transmission Control Protocol (TCP) • Internet Protocol (IP) • Domains • History of the internet

  3. IST140 – Important things you’ll nee • Text - Internet Literacy, 4th edition, by Fred Hofstetter • DO NOT Install FrontPage (on CD that comes with the textbook) until you’re told to do so!!! • You will need something to store/carry your work (floppy, CD, USB drive)

  4. What are you expecting from this course?

  5. So let’s get started…

  6. What is the internet?

  7. The Internet is… • A World wide connection of >285 million computers • Uses common Internet protocol (IP) • Developed by U.S. Department of Defense in 1969 to protect network data • Web pages increased from ~300 million in 1998 to ~300 billion in 2003

  8. The Internet • The Internet is the fastest growing technology in history: • Radio too 38 years to gain 50 million listeners. • Television too 13 years to reach the 50 million mark. • The Internet took 4 years to reach 50 million • In 2005 there were 1.08 billion people using the Internet (total world population in 2005 was 6.45 billion people)

  9. The Internet is much more than just the web Internet ≠ The World Wide Web

  10. Internet ≠ The World Wide Web • The World Wide Web is information accessible via the Internet. • The World Wide Web contains documents and multimedia that are connected by hyperlinks. • The Internet is global collection of networked computers using internet protocols

  11. Let’s take a closer look at the internet… Go to: www.mccc.edu/~crabtrem/ist140/ex1.htm

  12. Some Internet Definitions We will talk about these in depth during this course

  13. The Internet includes a number of services • E-mail • Listserv • Newsgroups • Chat rooms • Videoconferencing • File transfer • Multimedia streaming • Rich site summary • Blogging • World Wide Web

  14. Electronic Mail - email • Most common Internet service • Mail queues hold both personal and business items • Unsolicited mail are increasing problem

  15. List Severs - Listserv • Uses e-mail protocol • Users must subscribe to list • All users receive same email message • There are 1,000s of listservs

  16. Newsgroups • Newsgroup subscribers use newsreaders to access a group’s news feed • Usenet is an electronic bulletin board • Newsgroups contain information on most any topic

  17. Chat • Popular real-time communication • Each chat room has a different conversation • You can join or create your own chat room

  18. Instant Messaging (IM) • Instant messaging allows you to contact friends or associates • An IM will appear on your screen when a contact is made • “IM” is both verb and noun

  19. Videoconferencing • Uses video camera and microphone • Less popular than text-only chat • Higher bandwidths will support future growth

  20. FTP • File Transfer Protocol • Standard method for transferring files over the Internet from one computer to another • “FTP” is both verb and noun

  21. FTP The author clicks the right arrow to FTP a file from his computer to McGraw-Hill.

  22. Multimedia Streaming • Digital transmission of multimedia • Uses memory buffer to distribute (“stream”) data • Radio and television stations broadcast live shows

  23. World Wide Web • WWW is a networked hypertext system • Hypertext uses underlined links to launch link objects • Invented in 1989 by Tim Berners Lee at CERN lab in Geneva, Switzerland

  24. World Wide Web • In 1993, NCSA released Mosaic graphical user interface • In 1994, Netscape released the popular Navigator browser • In 2003, Netscape promoted free, “open source” products Mozilla, Firefox, and Nvu

  25. Rich Site Summary (RSS) • RSS uses eXtensible Markup Language (XML) for handling Web site content • Popular Web format for distributing news headlines, project updates, and event listings

  26. Blogging • Term blog is short for weblog • Written by different individuals to chronicle their selected topics for Internet dialog • Public directories and tools are available to create these “online diaries”

  27. How does the Internet work?

  28. What is TCP/IP? • TCP stands for Transmission Control Protocol • TCP is a protocol than handles packet routing over the Internet • IP stands for Internet Protocol • IP administers the sending and receiving of computer addresses

  29. IP Addresses • Unique for each Internet computer • Current IP addresses use dotted quad notation • Four 8-bit numbers separated by periods • Range 0.0.0.0 to 255.255.255.255 • Future IP addresses will use IPv6 • Four 16-bit numbers • Range 0 to 65,535

  30. Domains and Subdomains • Domain name system (DNS) allows alphabetic addresses instead of numbers • For example, to access the Library of Congress, use 140.147.249.7 or www.loc.gov • Common top level domains are: • .edu .gov .com .biz .net • .int .mil .aero .org .pro

  31. A Brief History of the Internet

  32. Brief History of the Internet • The Internet originated in 1969 when DOD initiated ARPANET for network security • During 1970s, universities joined ARPANET for research opportunities • In 1983, the military switched to MILNET

  33. Internet History (cont.) • In 1986, the National Science Foundation began NSFNET to connect supercomputers • In 1991, commercial entities were allowed, speeding expansion greatly • Currently, U.S. backbone traffic is routed through network providers

  34. Next time • Chapter 2 – The Internet's effect on the world • Open book quiz – Chapter 1

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