"The father of the internet"
Previous Careers
Also known as Robery Elliot "Bob" Khan, he was born on December 23, 1938 in Brooklyn, New York. In 1972, he began work at the Information Processing Techniques Office (IPTO) within ARPA. In the fall of 1972, he demonstrated the ARPANET by connecting 20 different computers at the International Computer Communication Conference, "the watershed event that made people suddenly realize that packet switching was a real technology." He then helped develop the TCP/IP protocols for connecting diverse computer networks. After he became Director of IPTO, he started the United States government's billion dollar Strategic Computing Initiative, the largest computer research and development program ever undertaken by the U.S. federal government.
The Internet
While working on a satellite packet network project, he came up with the initial ideas for what later became the Transmission Control Protocol (TCP), which was intended as a replacement for an earlier network protocol, NCP, used in the ARPANET. While working on this, he played a major role in forming the basis of open-architecture networking, which would allow computers and networks all over the world to communicate with each other, regardless of what hardware or software the computers on each network used. To achieve this goal, TCP was designed to have the following features:
Vint Cerf also joined him in the spring of 1973 and together they created an early version of TCP. They eventually made it into 2 layers with the basic functions being in IP (Internet Protocol). This led them to often call the internet TCP/IP.
Image: http://upload.wikimedia.org/wikipedia/commons/thumb/f/fe/Bob_Kahn.jpg/517px-Bob_Kahn.jpg
Sites:
http://en.wikipedia.org/wiki/Bob_Kahn
Also known as Robery Elliot "Bob" Khan, he was born on December 23, 1938 in Brooklyn, New York. In 1972, he began work at the Information Processing Techniques Office (IPTO) within ARPA. In the fall of 1972, he demonstrated the ARPANET by connecting 20 different computers at the International Computer Communication Conference, "the watershed event that made people suddenly realize that packet switching was a real technology." He then helped develop the TCP/IP protocols for connecting diverse computer networks. After he became Director of IPTO, he started the United States government's billion dollar Strategic Computing Initiative, the largest computer research and development program ever undertaken by the U.S. federal government.
The Internet
While working on a satellite packet network project, he came up with the initial ideas for what later became the Transmission Control Protocol (TCP), which was intended as a replacement for an earlier network protocol, NCP, used in the ARPANET. While working on this, he played a major role in forming the basis of open-architecture networking, which would allow computers and networks all over the world to communicate with each other, regardless of what hardware or software the computers on each network used. To achieve this goal, TCP was designed to have the following features:
- Small sub-sections of the whole network would be able to talk to each other through a specialized computer that only forwarded packets (first called a gateway, and now called a router).
- No portion of the network would be the single point of failure, or would be able to control the whole network.
- A computer which sent information to another computer would know that it was successfully received when the destination computer sent back a special packet, called an acknowledgement (ACK), for that particular piece of information.
- If information sent from one computer to another was lost, the information would be retransmitted, after the loss was detected by a timeout, which would recognize that the expected acknowledgement had not been received.
- Each piece of information sent through the network would be accompanied by a checksum, calculated by the original sender, and checked by the ultimate receiver, to ensure that it was not damaged in any way en route.
Vint Cerf also joined him in the spring of 1973 and together they created an early version of TCP. They eventually made it into 2 layers with the basic functions being in IP (Internet Protocol). This led them to often call the internet TCP/IP.
Image: http://upload.wikimedia.org/wikipedia/commons/thumb/f/fe/Bob_Kahn.jpg/517px-Bob_Kahn.jpg
Sites:
http://en.wikipedia.org/wiki/Bob_Kahn