Lesson 7 – World Wide Web

What is the World Wide Web?  The content of the worldwide web is held on individual web pages gathered together to form websites of associated information.  Websites are held on a computer called a “Web Server”. A webserver is connected to the internet and allows people access to view the pages.  In simple terms this means the World Wide Web is a collection of webpages which are stored on web servers connected to the internet.

Worldwide Web  Web pages are viewed through web browsers.  These are software applications which allow internet users to access, retrieve and view information on the internet.  Examples consist of:

HTML  Your Web Browser reads web pages in HTML format.  HTML stands for Hypertext Markup Lanugage – You need to know this!  HTML is a language which relies on a series of tags. Tags usually operate in pairs, as  shown in the example in Table 1.5 (page 21). There is an opening tag such as,  or, and an end tag. End tags are identified by starting with the ‘/’ character.  For example: closes the section of program called ‘body’; closes the  bullet point tag and ends the paragraph ‘p’.  Tags which don’t operate in pairs include (used to tag an image) and header  tags (e.g. ).  The content between each pair of tags is called an HTML element. The language is  written as a series of elements. Gradually the elements build up to describe a web  page. Table 1.5 gives a small, simplistic example.

Work through the HTML Lesson 1 and 2 Worksheet. Use the HTML Tag Helpsheet if needed.

The Internet  Remember that The internet is simply a worldwide computer network that uses standardised communication protocols to transmit and exchange data. You will need to compare the internet to the Worldwide Web in your worksheet.

URL – Uniform Resource Locator  Web pages are searched for using a uniform resource locator (URL), which is a string of characters that identify a particular web page on the internet. Every web page has a unique URL.  URLs are made up of three components.  1/ part 1/ index.htm 1/ part 1/ index.htm  Protocol Domain Pathname

Search Engines