Introduction to the Internet
and the World Wide Web

• Servers

• supply information and service
• Clients

• users of the information

• Hosts
• Any computer with a direct connection
• to the Internet
• …can communicate, share data and run applications
• Domain
• identifies the organization
• identifies type or location
• helps to route data efficiently

• numerical address
• 4-part number—similar to area code and phone number
• assist with routing
• locating host
• 198.64.7.9

• Provide access to the Internet
• AOL
• SBC
• EarthLink
• MSN

• EMail and Listservs
• Electronic Mail
• single most useful tool of the Internet
• Eudora–freeware/shareware
• Outlook
• Netscape
• Yahoo
• Hotmail

• done through EMail
• similar to a newsgroup
• many subjects available
• subscribe and receive all "posts" to the list
• post your own responses

• Usenet Newsgroups
• alt.??????

• thousands of newsgroups
• provide a place where users can post comments, stories and/or questions
• must have a newsreader

• File Transport Protocol

• servers configured to allow FTP connections
• used to download and upload files
• software
• information/documents/web

• establishes a link between two hosts or between a client and host
• similar to using a modem to :
• access BBS (bulletin board system)
• log into home computer and read mail
• log into Internet server for file manipulation.

• Created by Tim Berners-Lee at CERN in 1989
• [ European Particle Physics Lab ]
• Authoring language and distribution system which allowed creation and sharing of
• multimedia-enabled electronic documents over the Internet
• First graphics on the Internet
• Viewed with "Browsers"

• Original browser - NCSA Mosaic in 1993
• Created by Mark Andreeson at Illinois (UI)
• Available FREE
• "Changing as fast as time…"
• Netscape Navigator
• Internet Explorer
• Mozilla

• http://www.foothill.edu/ctis/office.html
• http://

• Hypertext Transport Protocol–standard for communication that governs web objects.
• www.foothill.edu
• "domain"–identifies host computer where document is stored.
• Translates into numeric address–IP.
• /ctis
• subdirectories or paths which identify the exact location of the document.
• office.html
• document name stored as html document.

• Click "links" to:
• go to a different (related) page
• play a sound or recorded message
• play a movie
• download a picture
• System of linked information is called Hypertext
.

• Ian Campbell, Director of Collaborative Technologies for IDC
• 1995 10M Web Browsers in use
• 1996 40 M
• 2000 180 M
• Used for:
• Internet
• Intranets
• Extranets

Hobbes' Internet Timeline v8.0 Webreference

Hotwired– Webmonkey