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DATA COMMUNICATIONS

This overview explores the history of the Internet, beginning with its roots in the ARPAnet, developed by the Department of Defense in the 1960s for military and scientific communication. It discusses how researchers adopted ARPAnet for data sharing, leading to the eventual creation of the Internet, a "network of networks" that revolutionized global communication. The transition from ARPAnet to MILnet and the development of NSFnet in the 1980s are highlighted, showcasing the foundation of modern Internet connectivity.

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DATA COMMUNICATIONS

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  1. DATA COMMUNICATIONS Examining the History of the Internet

  2. What is a network? • A network is a group of computers linked by cables, telephone lines, or other communication media. • The computers share a network server that stores files and programs that can be used by all the computers within the network.

  3. What is the Internet? • The Internet is the “network of networks.” • The Internet is a collection of computer networks that allows users to view and transfer information between computers all over the world.

  4. How did it start? • The Department of Defense in the 1960s developed a network of computers known as ARPAnet. • Researchers at colleges and universities quickly realized the usefulness of ARPAnet and started using it to share data.

  5. What is ARPAnet? • ARPAnet = Advanced Research Projects Agency Network • The network was established for military and scientific use. • Its main purpose was to maintain communications in case of a nuclear war or natural disaster.

  6. How did ARPAnet become the Internet? • In the 1980s, the military portion of the ARPAnet became a separate network known as MILnet. • The National Science Foundation funded a non-military system of supercomputers known as NSFnet. • Thousands of government, academic, and business computer networks were given remote access to NSFnet. • By the late 1980s, the term Internet was used to describe the information superhighway that was developed.

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