1.5

• Internet


  A global network of interconnected networks
• World Wide Web (WWW)


  A way of accessing information, using protocols such as HTTPS to view web pages
• Types of World Wide Web technologies

  • Internet
  • Intranet
  • Extranet
• Internet


  • Public, users have open access
• Use of the internet


  • Accessing web pages to shop and watch videos
  • Businesses may use web pages to advertise their products and allow customers to purchase items
• Intranet


  • Private network, only accessible to authorised users (e.g. members of a business or school)
  • Private, users have closed access
• Use of an intranet


  • Schools often use an intranet to log in to that displays information for teachers and students (such as test results or upcoming events)
  • Businesses might use an intranet for employees to see sales and performance data or for communication because it can be accessed remotely
• Extranet


  • Private network accessible using the internet, but provides access only to authorised users
  • Private, users have shared access
• Use of an extranet


  • Hotel booking companies (like booking.com) use an extranet to allow hotel owners to log in via the internet to access and update their information
• Network characteristics


  • Speed
  • Security
  • Access levels
  • Accessibility
• Speed


  How quickly data can be accessed
• Security


  How likely the data will be kept secure
• Access levels


  Who can see what, in terms of data and files
• Accessibility


  How available the data is