Outline -
Networks, Internet and the World Wide Web
1. Networks and the Internet.
Network - A collection of computer devices connected to each other in a variety of ways.
Internet - A collection of local and wide area networks connecting computer devices.
1969 - The Internet started in with ARPANET
1991 - The World Wide Web started with Tim Berners Lee's CERN project
1994 - The first browser from Marc Andreeson, Univ. Of Illinois Supercomputer Ctr
2. IP Numbers - a unique no. for any computer using the internet
3. Domain Names
| Generic classes: Edu, Com, Gov, Mil, Org, Net
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| Country Codes: MX - Mexico, FR - France, US - United States
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UALR.EDU
ARISTOTLE.NET |
KARK.COM
ARJAZZ.ORG |
ROOTSWEB.COM
NASA.GOV |
4. What is the World Wide Web (WWW or the Web)?
-multimedia part of the internet
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Browser |
Application software that connects to
the Web, such as Netscape, Internet Explorer, Firefox
Websage, AOL. Also referred to as Web Client software |
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Home Page |
First screen displayed by(1) a web site; also (2) your computer |
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URL |
Uniform Resource Locator - A web address, like http://www.ualr.edu/ |
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Hypertext |
A "Link" - Text or picture on a web page that you click on to go to another web page |
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HTML |
Hypertext Markup Language - the programming language that web pages are created in. |
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HTTP |
Hypertext Transport Protocol -the rules (protocol) for transmitting web page data |
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TCP/IP |
Transmission Control Protocol/Internet Protocol - a technical communications protocol for internet data transmission |
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Client/Server |
A relationship between two computers in which one, the client, makes a service request from another, the server |
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Portal |
The first place you go to start your internet session |
5. ISP - Internet Service Providers
- Companies or organizations sell or provide access to the Internet, such as the university
- Commercial ISPs charge a fee: Aristotle, IPA, SWBell, AOL , MSN, Comcast
- Other Organizations: Universities, libraries, companies
- Dialup Modems - transfer speed is 56 thousand bits per second (kbps) - you see v.90
- Broadband - faster - DSL and Cable Modem - faster - about 1.544 millions of bits per second (mbps)
6. Exercises:
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Go to www.ualr.edu/gblane/ |
Find the class schedule |
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Go to Tools and Options |
Make UALR your Home Page |
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Go to About.com |
Find the link to "Pets" |
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Go to refdesk.com |
A Virtual Reference for everything |
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Make it a "Favorite" |
See Favorites menus |
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Go to USAtoday.com |
Find the Dallas City Guide |
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Guess a URL |
Think of a company; guess it's URL |
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Enter "Sears" in the address bar |
Do Control-Enter - what does it do?
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7. In addition, there are numerous general purpose search engines, such as Yahoo, Altavista, Google. There are Meta Search Engines such as Mamma.com and Dogpile.com. There are special purpose search engines such as switchboard.com for "People Search", and Mapquest.com, for maps. There are sites for buying: Academic superstore.com, buy.com. There are sites where you can sell your textbooks - bigfoot.com, booksvalue.com, bookbyte.com, amazon.com, half.com
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