What is the Internet and How does it work?
Birth of the Internet Data at military sites easily isolated Every site linked to every other site through multiple connections Super Interstate Highways in the 1950’s linked major cities across the USA US response to threat of “cold war”
the INTERNET The INTERnet links many thousands of networks and computers together to share information. Local ISP Internet Service Provider Anyone can access it.Anyone can add to it.
INTRAnet? - INTERnet? INTRAnet - internal - inside a network www FILESERVER Users MUST be inside the network to access it
INTRAnet? - INTERnet? INTRANET • internal • access limited to those INSIDE the network • users may read and write to the fileserver • users may access the internet INTERNET • world wide • access available to anyone and everyone • users may read, write and download from the internet
The Directory - the section on the domain that contains the document requested The protocol - tells the computer what kind of request it is. The file -the actual name of the file requested The domain name - tells the computer where to send the request. IP: 126.96.36.199 so ….. how does it work? URL - Universal Resource Locator http://www.cap.nsw.edu.au/teachers/lesson_plans.html If no directory or file is requested the web server will usually send a preset default or “home” page http://www.cap.nsw.edu.au will deliver CAP’s home page
Netscape Navigator or Communicator Microsoft Explorer Web Browsers