The Internet and World Wide Web

• Internet:

  • Users can send and receive emails
  • Online chatting
  • Uses Transmission protocols and Internet Protocols
  • Is a worldwide collection of interconnected networks and devices
• Word Wide Web:

  • Collection of multi-media web pages and other information on websites
  • http(s) protocols written using hypertext markup language
  • Uniform Resource Locators (URLS) used fo specify the location of web pages
  • Web resources are accessed by browsers
  • Uses the Internet to access information from web servers
• Web Browsers are software that allow users to access and display web pages or play multimedia from websites on their devices
• Web Browsers interpret hypertext markup language sent from the websites
• URLs are text addresses used to access websites. Made up of the protocol (http or https), the domain information, the web page and the name of the item on the webpage
• Domain information consists of the domain host (www), the domain name, the domain type (.com, .org) and the country code
• Hypertext Transfer Protocol is a set of rules that must be obeyed when transferring files across the internet. If some form of security is used, it becomes httpS and a green padlock can be seen in the browser address window
• Features of a Web Browser:

  • A home page and address bar
  • The ability to bookmark websites/pages
  • Storing user history
  • Using tabs to have multiple sites open
  • Using cookies
  • Using hyperlinks to navigate between websites
• Web browsers store data in a cache and make use of JavaScript
• A browser needs to know the IP address to retrieve pages from a website. This is done by using a domain name server (DNS) which converts a URL into an IP address that the computer can process