Computer Networks and Internet

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Presentation transcript:

Computer Networks and Internet

Objectives Computer Networks Internet

Internet

Internet A system that connects billions of computers around the world. A global network of hundreds of thousands of computers Widely considered to be the defining technology of the beginning of this century

Web Protocols Hypertext Transfer Protocol (HTTP) specifies the format of URLs as well as the procedure clients and servers follow to establish communication.

Web Page Design HTML Document Authors use a markup language called Hypertext Markup Language (HTML) to create Web pages.

HTML Document Page Created

Web site A Web site is a collection of related Web documents that are made available to the public. The index page, or home page, is the first page of a Web site.

Web page A page on the internet with information and links to other pages.

Home Page The first/main page for a website. Or the default start page is the page that appears when the web browser starts. It can be customized.

Link Words you can click on to open another page

Text Box A white box in which you can type one line of text (a couple of words)

Text Area A white box in which you can type several/many lines of text

Drop Down Box A text box with an arrow at the end; click on it to see a list of choices

Back The icon that takes you to the last page you looked at

Browser The program you use to open the internet (Internet Explorer and Mozilla Firefox are the most common ones)

search To look for information

Search engine A web site that searches the internet for information you want

Popular Search Engines URL Lycos www.lycos.com Yahoo www.yahoo.com AltaVista www.altavista.com Google www.google.com Infoseek www.infoseek.com Excite www.excite.com AlltheWeb www.alltheweb.com

Uniform Resource Locator (URL) Website address

File Transfer Protocol (FTP) A protocol for transferring files among computers. FTP servers maintain collections of downloadable files Downloading can often be done anonymously, without logging in