A Brief History of the Internet

Topics: Internet, Computer network, Network Control Program Pages: 6 (1837 words) Published: October 21, 2001
A Brief History of the Internet
Within our society there has been a revolution, one that rivals that of the Industrial Revolution. The Technological Revolution. At the head of this revolution is the Internet. A place full of information, adventure, and even for some, romance. In our society today everyone has heard of this technological wonder, and many use it on a daily basis, but for some the question still remains… What is the Internet, and where did it come from?

Some thirty years ago, the RAND Corporation, American's foremost Cold War think-tank, faced a strange strategic problem. How could the US authorities successfully communicate after a nuclear war? Post nuclear America would need a command-and-control network, linked from city to city, state-to-state, and base-to-base. But no matter how thoroughly that network was armored or protected, its switches and wiring would always be vulnerable to the impact of atomic bombs. A nuclear attack would reduce any conceivable network to tatters. And how would the network itself be commanded and controlled? Any central authority, any network central citadel, would be an obvious and immediate target for an enemy missile. RAND mulled over this grim puzzle in deep military secrecy, and arrived at a daring solution. The network would have no central authority. Furthermore, it would be designed from the beginning to operate while in tatters.

The principles were simple, the network itself would be assumed to be unreliable at all times (Krol 11). It would be designed from the get-go to transcend its own unreliability. All the nodes (computers hooked to the network) in the network would be equal in status to all other nodes, each node with its own authority to originate, pass, and receive messages. The messages themselves would be divided into packets, each packet separately addressed. Each packet would begin at some specified source node, and end at some other specified destination node, winding its way through the network on an individual basis (Krol 11). The particular route that the packet took would be unimportant. Only final results would count. Basically, the packet would be tossed like a hot potato from node to node, more or less in the direction of its destination, until it ended up in the proper place. If big pieces of the network had been blown away, that simply wouldn't matter; the packets would still stay air born, lateralled wildly across the network by whatever node happened to survive.

The National Physical Laboratory in Great Britain set up the first test network on these principles in 1968. Shortly afterward, the Pentagon's Advanced Research Projects Agency (ARPA) decided to fund a larger, more ambitious project in the USA. In the fall 1969, the first node was installed in UCLA, and by December 1969 there were four nodes on the infant network, which was rightly named ARPANET, after its Pentagon sponsor (Overview of Internet Technology). The four computers could transfer data on dedicated high-speed transmission lines. They could even be programmed remotely from other nodes. Thanks to ARPANET, scientists and researchers could share one another's computer facilities by long-distance. By the second year of operation, however, and odd fact became clear. ARPANET's users had warped the computer-sharing network into a dedicated, high-speed, federally subsidized electronic post office. The main traffic on ARPANET was not long-distance computing. Instead, it was news and personal messages. Researchers were using ARPANET to collaborate on projects, to trade notes on work, and eventually, to downright gossip and schmooze. People had their own personal user accounts on the ARPANET computers, and their own personal address for electronic mail (email) (Overview of Internet Technology).

Throughout the ‘70s, ARPANET's network grew, its decentralized structure made expansion easy. As long as individual machines could speak the packet-switching...
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