Evolution of Internet


Evolution of Networking
A network is a group of connected communicating devices such as computers and printers. An internet is two or more networks that can communicate with each other. The most notable internet is called Internet, a collaboration of more than hundreds of thousands of interconnected networks. This extraordinary system comes into existence in 1969.
In mid – 1960s, mainframe computers in research organizations were standalone(means not communicating) devices. Computers from different manufacturers were unable to communicate with one another. The Advanced Research Projects Agency (ARPA) in the Department of  Defense (DoD) was interested in finding a way to connect computers so that the researchers they funding could share their findings.
In 1967 , at an Association for Computing Machinery(ACM) meeting, ARPA presented its idea for ARPANET, a small network of connected computers. By 1969, ARPANET was a reality. Four nodes (Computers) were connected via the IMPs(Interface Message Processor) to form a network.

The Internet
Today, it is very rare to see a LAN, a MAN, or a LAN in isolation; they are connected to one another. When two or more networks are connected, they become an internetwork, or internet.
The internet has come a long way since 1960s. The internet is not a simple hierarchical structure. It is made up of many wide area networks joined by connecting devices and switching stations. It is difficult to give an accurate representation of the Internet because it is continuously changing- new networks are being added, existing networks are adding addresses, and networks of distinct companies are being removed.

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