Internet

Internet

1. What is a network?

   • a group of inter-connected networks
   • A network is also a group of computers that are connected and can share information.

2. World Wide Web

   • A collection of web pages
   • stored on computers all over the world
   • Accessed via the internet
   • no central storage
   • no owner

3. URL

   • uniform resource locator
   • A URL is a web address
   • all web addresses are unique

4. Parts of a web address

   • www.abc.co.uk/images/logo.jpg
     • Red= hosted on the www  Orange=name of the organisation  Yellow=a company  Green= UK based  Blue= folder location  Purple=filename on the site 

5. domain names

   • Top level domains (TLDs)
     • .uk
     • .fr
       • .cz
       • .com
     • .es
       • .org
       • .gov
     • .de
       • .edu

6. HTTP

   • Hypertext transfer protocol
   • A protocol is a set of rules
   • Http defines the rules used by web browsers and servers to exchange information
   • If everyone follows the same set of rules, everything works