C2. The World Wide Web

World Wide Web

A software that consists of Web pages, images, sound files, etc.

• The software stores and retrieves those files.

Web Server

A computer that stores documents and serves them to other computers that want access.

Web Browser

Allows users to request and view the documents stored on servers.

Hypertext

Documents with interlinked text and media, have existed for millennia.

Network effect

When a product or service increases in value as more people use it.

Spiders

Programs that traversed the Web, cataloguing pages to match against the search words.

• Also known as Web crawlers.

PageRank Algorithm

Is used to produce high quality search results.

• Ranks pages based on their perceived value and trustworthiness.

Web page

Is nothing more than a text document that contains formatting information in a language called HTML.

URL (Uniform Resource Language)

Also known as its web address.

• Has specific names so that users can identify them and browsers can locate them.

Hyperlink

Represents a connection to another page and is usually displayed in a web page as underlined, colored text.

HTTP (HyperText Transfer Protocol)

The protocol that determines how messages exchanged between browsers and servers are formatted.

Caching

a technique that stores copies of data in a temporary location to speed up access to that data.

Cookies

Small, special-purpose files that can be stored by the browser on your computer when you visit a Website.