A Worldwide Network of Networks, People, Data and Processes

1
The Internet - What is it?

• A Worldwide Network of Networks, People, Data and
  Processes
• Common Protocol (TCP/IP) lets all of these
  networks talk to one another
• To the user it appears to be one big network

2
The Internet - How do I get it?
How do I get connected?

• Free Services
• Free-nets in many cities around the world (Aztec
  at ASU) --965-6699 965-4151
• Partial connection to the Internet
• E-mail
• Usenet News Groups
• World-Wide-Web using Lynx
• Connection to other Free-nets
• Local Bulletin Boards with partial or full access
  (may be free or fee)
• Access through University or other school
  (students and faculty)
• Access through employer

3
The Internet - How do I get it?
How do I get connected?

• Commercial Services -
• America Online
• Local Internet Access Provider
• National Internet Access Provider
• Global Internet Access Provider
• http//www.thelist.com for The List

4
The Internet - What can I do?

• Electronic Mail (E-mail)
• File Transfers (FTP and anonymous FTP)
• Run programs on other computers (Telnet)
• Usenet News Groups and List Servers
• Internet Relay Chat (IRC)
• World-Wide-Web

5
World Wide Web -Definitions

• WWW - World Wide Web
• A globally distributed hypermedia information
  system invented by Tim Berners-Lee at CERN,
  Switzerland.
• Browser (NCSA Mosaic, lynx, Netscape Navigator,
  Internet Explorer, etc.)
• Some are free, some cost
• Different features and extensions
• HTTP - Hyper-Text Transfer Protocol
• The protocol used by Mosaic/WWW for transferring
  information. The data may be plain text,
  hypertext, images, or any other data.

6
World Wide WebDefinitions

• HTML - Hyper Text Markup Language
• Defines the logical structure of a Web document
  allowing structured text with links to other
  pieces of information.
• Information objects are multimedia in nature.
• Search Engine - one of various ways of finding
  information on the WWW
• URL - Uniform Resource Locator
• An addressing convention used to uniquely
  identify a data object over a global data space.
• For example
  http//prep.ai.mit.edu/pub/gnu/gcc-2.6.0.tar.gz

7
World Wide WebInteresting places

• Lots of Software Available
• www.tucows.com,
• shareware.com
• Search engines
• www.webcrawler.com
• www.altavista.com
• www.yahoo.com
• lots more http//aztec.asu.edu/aztecdoc/search.ht
  ml
• Whatever you are interested in is out there.

8
World Wide WebA Multimedia technology
Video/Animation
9
World Wide WebGlobal Data Space
... or on the same filesystem ...
... or on the same network ...
... or somewhere in the world !!
10
World Wide WebNetwork Transparent to User
Database Server
Internet
this is a link to another document in the East
Coast.
But you dont know and you dont care.