30 Years of Modern Internet
Written by Historian   
Wednesday, 02 January 2013

It is now 30 years since the transition, completed on January 1 1983,  from the use of disparate packet-switched networks to the unified computer communication protocol TCP/IP pioneered by Vinton Cerf and Robert Kahn.

The great achievement of the modern internet it is that it enables data to be freely exchanged among all the networks that make up the world wide web. It does this with a combination of two communications protocols - TCP/IP (Transport Communications Protocol over Internet Protocol).

 

internet map 400

 

The TCP protocol was first described in a paper by Cerf and Kahn published in 1974 in the IEEE Transactions on Communications. After being tested by DARPA, TCP/IP was accepted as its new standard in 1981 and in November 1981 Jon Postel published a transition plan whereby the 400 APRPANET hosts were to be migrated from the older NCP protocol to TCP/IP. This had a deadline of January 1, 1983, after which point all hosts not switched would be cut off.

Vinton Cerf and Robert Kahn in the 1970s, Jon Postel

Writing on January 1, 2013 on the Official Google blog, Vint Cerf recalls:

When the day came, it’s fair to say the main emotion was relief, especially amongst those system administrators racing against the clock. There were no grand celebrations—I can’t even find a photograph. The only visible mementos were the “I survived the TCP/IP switchover” pins proudly worn by those who went through the ordeal!  Yet, with hindsight, it’s obvious it was a momentous occasion. On that day, the operational Internet was born. TCP/IP went on to be embraced as an international standard, and now underpins the entire Internet.

tcptrans


Thirty years on we tend to take the Internet for granted.

 

More Information

Marking the birth of the modern-day Internet

A Protocol for Packet Network Intercommunication (pdf)

Related Articles

The Internet

 

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