Using the Internet as the highway and www as the car metaphor puts things into perspective for me. Email is just another car that uses the same highway.
The internet provides the infrastructure that allows computers to communicate around the world using the Internet protocol suite (IP). Originally set up by the American Military as an 'intelligence' network. The www is a service available on the internet that allows for hyperlinked documents to be stored and viewed by computers using a set of protocols or instructions. It was invented by CBRN back in the 1990's. Both Internet and www were funded using public money.
The www needs client machines to function and operate eg. a laptop, desktop, mobile devices etc that respond to user input. They in turn talk to a high powered Server that waits for requests from the 'client'. They operate using Transmission Control Protocol/Internet Protocol (TCP/IP). It splits the data into ‘packets’, which are safer and provide more security. The packets then meet up client side to provide the page. A web site can have millions of requests/second. eg. one web page may have 100 file requests to pull together all the information. It is possible to have one machine that acts as server and client.
Computers are identified by their Internet Protocol (IP) address, in effect a unique number. Domain name servers then interpret these numbers into a given name or Uniform Resource Locator, URL.
Hypertext is a natural language used digitally that incorporates links from one bit of information to another, allowing the user to move between documents in a non linear fashion.
Links embedded in pages are added as meta information using markup language. HTML is an example of such markup language that allows links to documents using IP.
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