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Internet and the WWW

Did you know that the terms "Internet" and "World Wide Web"

do not mean the same thing?

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The Web is a Subnetwork of the Internet

•The World Wide Web or "Web" is the largest and most well-known subnetwork on the Internet.

–Example: Canadian Tire has several departments•The Web uses hypertext transfer

protocol (HTTP) which allow users to retrieve information and jump (hyperlink) to other Web pages.

•Hypertext transfer protocol (HTTP) is the language of the Web.

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Protocol is a digital language

•Every subnetwork on the Internet uses a protocol or digital language.

Protocol (language) Abbreviation Purpose

Hypertext Transfer Protocol HTTP Web pages

Secure Hypertext Transfer Protocol HTTPs or SSL Logging into your bank account

Email SMTP or POP Email

File Transfer Protocol FTP File downloading

Instant Messaging IM Live chat

Transmission Control Protocol/Internet Protocol

TCP/IP Binds all of the above protocols together

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Subnetworks require special software

•To browse the Web you require special software such as Internet Explorer, Safari or Google Chrome.

•Install optional "plug-ins" to enhance your web browser in order to hear audio files and view video files.

Adobe Acrobat Reader To view .pdf files

Macromedia Shockwave Player

To run .swf movies

Windows Media Player To listen to movies and music files

Windows WinAmp To play downloaded .mp3 and .wav files

Pop-Up Killer software To reduce advertisements that appear unsolicited on your screen (Many are available.)

Anti virus software To avoid getting a virus on your computer (There are many available such as McAfee or Norton.)

WinZip To compress and decompress downloaded files

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Accessing pages on the Web

•URL stands for Uniform Resource Locator

•http://www.edu.gov.on.ca/eng/about/contact.html 1. Protocol http

2. Host computer name www3. Fourth-level domain name edu

4. Third-level domain name gov

5. Second-level domain name on

6. Top-level domain name ca

7. Directory name eng8. File name contact

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Searching for Web Pages

•Search Engines •Boolean Searching

–the searcher uses operators to describe the relationship between keywords and the information needed.

–There operators are:•AND •NOT •OR

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Search Engines

•Google–Advanced Search

•Meta Search Engines–search the database of several search

engines–Dogpile