Internet

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Internet

  1. 1. The Internet How did the internet develop?
  2. 2. How did the internet develop? <ul><li>The internet as we know it today is actually a very large wide area network (WAN) connecting computers and networks around the world. </li></ul><ul><li>It makes it possible for millions of computer users to connect to one another via telephone lines, cable lines, and statellites </li></ul>
  3. 3. Internet was “born” in the late 1960s <ul><li>Advanced Research Projects Agency (ARPA) or the US Department of Defense linked together mainframe computers to form a communications network. </li></ul>
  4. 4. The Agency’s main objectives <ul><li>Create a communication system that could survive a nuclear attack or natural disaster </li></ul><ul><li>Provide communication links to its users in remote locations </li></ul>
  5. 5. ARPANet <ul><li>Early version of the internet was known as ARPANet </li></ul><ul><li>Backbone </li></ul><ul><ul><li>Is a term used to describe a structure that handles the major traffic in a networked system– much like a major highway </li></ul></ul><ul><ul><li>Network Backbone </li></ul></ul><ul><ul><li>is a “cyberspace highway” made up of high-speed cables and switching stations </li></ul></ul>
  6. 6. internetworking <ul><li>The process of linking a collection of networks is called internetworking </li></ul><ul><li>This term is where the internet got its name </li></ul><ul><li>The term internet was officially adopted in 1983 . </li></ul><ul><li>More commonly referred to as the Net </li></ul>
  7. 7. ARPANet <ul><li>Users originally used the internet to share </li></ul><ul><ul><li>Scientific and engineering information </li></ul></ul><ul><li>Other uses discovered </li></ul><ul><ul><li>Email most popular </li></ul></ul><ul><li>Expansion into Europe in 1970s </li></ul>
  8. 8. ARPANet splits into two parts <ul><li>ARPANet and MILNet </li></ul><ul><li>MILNet </li></ul><ul><ul><li>Various defence agencies and the military </li></ul></ul><ul><li>ARPANet </li></ul><ul><ul><li>Research and development network </li></ul></ul><ul><ul><li>International communication tool for the academic community </li></ul></ul>
  9. 9. Mid 1980s <ul><li>Speed of ARPANet backbone no longer sufficient </li></ul><ul><li>National Science Foundation (NSF) created a new high-speed network NSFNet </li></ul>
  10. 10. NSFNet <ul><li>Two main objectives </li></ul><ul><li>To interconnect supercomputing centres so they could access one another’s recources </li></ul><ul><li>To give academic and research centres access to one another for purposes of exchanging information </li></ul>
  11. 11. ARPANet and NSFNet <ul><li>Linked together but NSFNet had a faster backbone </li></ul><ul><li>By early 1990s NSFNet fully replaced ARPANet </li></ul>
  12. 12. Growth of Internet <ul><li>Fueled by purchase of personal computers </li></ul><ul><li>Growing demand for “anytime, anywhere” </li></ul><ul><li>NSFNet academics only </li></ul><ul><li>Bell, AT&T and Nortel built high-speed backbones and new networks that used the same protocols </li></ul>
  13. 13. TCP/IP (Transmission Control Protocol/Internet Protocol <ul><li>Accepted means of communication </li></ul><ul><li>Protocol </li></ul><ul><ul><li>Is an agreed upon format for transmitting data between two or more devices </li></ul></ul><ul><ul><li>A set of formal rules for transmitting data </li></ul></ul>
  14. 14. TCIP/IP <ul><li>Available for free </li></ul><ul><li>Rapid growth of the internet </li></ul><ul><li>Set up internet accounts with telecommunications companies and Internet service providers (ISPs) </li></ul><ul><li>Internet - most popular use </li></ul><ul><ul><li>Email and file sharing </li></ul></ul>

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