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 History of the internet

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)

What are you expecting from this course?

So let’s get started…

What is the internet?

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

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)

The Internet is much more than just the web 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

Let’s take a closer look at the internet… Go to:

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

The Internet includes a number of services Listserv Newsgroups Chat rooms Videoconferencing File transfer Multimedia streaming Rich site summary Blogging World Wide Web

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

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

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

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

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

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

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

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

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

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

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

Rich Site Summary (RSS) RSS uses e X tensible M arkup L anguage (XML) for handling Web site content Popular Web format for distributing news headlines, project updates, and event listings

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

How does the Internet work?

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

IP Addresses Unique for each Internet computer Current IP addresses use dotted quad notation –Four 8-bit numbers separated by periods Range to Future IP addresses will use IP v6 –Four 16-bit numbers Range 0 to 65,535

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

A Brief History of the Internet

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

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

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