Lecture 1.3 Internet Catch Up
The Internet is a vast ocean of information. The next section is dedicated to tips on how to unlock some of this information from within specific web pages. This is only a beginner tutorial, which will give the nitty gritty information needed to begin on the www journey.
Where are web pages?
Web pages are located on computers called servers all around the globe. We can read these web pages by using web browsers like Mozilla Firefox and Internet Explorer. Web browsers seek out these web pages through the phone lines (if you’re using a modem) and Network socket connections (if you’re using a LAN and Ethernet) by their URL, or web address. The URL is the “http://www.bu.edu” written at the top of your web browser.
How is a web page different from a word processing document?
Web pages are written in a programming language called Hyper-Text Markup Language (HTML). HTML is a coded text “recipe” which tells the web browser how to format the web page that you see. Since it’s only in text, a simple web page loads fairly quickly over your phone lines through a modem. HTML allows the author to provide colors, images, sounds, and links at minimal download time cost. It would take us much longer to download a Microsoft Word file loaded with pictures and formatted text (colors, italics, etc.) than it would for us to download an HTML file with the same formatting.In addition, HTML files are universal. This means that the same web page can be read by a PC, a Macintosh, a network computer running Linux.
What is Hypertext?
The words on a web page are known as hypertext, and can do things that regular word processors used to not be able to do. Hypertext can provide us with the ability to hyperlink to other web pages or other places within our web page.
What is a website?
A website is a collection of webpages linked on a similar topic. The PDP website is located here, and has information on all the options for professional development. Many webpages make up a website.