""Priscilla Oppenheimer"" wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > The history of TCP/IP is somewhat muddy, as you can imagine. > > At 02:04 PM 3/27/02, Steven A. Ridder wrote: > >I am a technical reviewer for a book, and someone wrote that TCP/IP was > >written by the Depertment of Defense. > > I agree that you should question that. > > > I am confident that ARPAnet was > >commissiond by the DoD in the 60's to BBN > > Yes, you could say that. The Information Processing Techniques Office > (IPTO) of ARPA awarded the contract to build the Interface Message > Processors (IMP) for ARPANET to BBN in late 1968. IMPs were the early > routers. BBN built the IMPs with the help (or hindrance if you believe some > reports) of Honeywell. Honeywell developed and manufactured the hardware. > BBN did the software. > > Descriptions of the "network layer" software that ran on these IMPs doesn't > sound much like IP at all. It was connection-oriented, for one thing, and > handled error correction. It was very East-Coast anal-retentive stuff. ;-)
Us Bostonians aren't that bad, are we? > > The software that evolved into TCP/IP was a West-Coast hippy-dippy geeky > phenomenon. Is UDP a west-coast thing? UCLA, SRI, UC Santa Barbara, USC, and University of Utah > graduate students and researchers worked on it. Originally they had to make > sure their software interoperated with the IMPs of the ARPANET. They > developed a protocol called the Network Control Protocol (NCP) that worked > on the end devices that communicated with the IMPs. It was a host-to-host > protocol that could be considered a predecessor to TCP. > > NCP worked only with ARPANET. By 1973 or so, ARPANET wasn't the only game > in town though. There was packet radio (which evolved into Ethernet), > SATNET, and others. A more general-purpose protocol was needed. Vint Cerf > who was with UCLA at the time and Bob Kahn, who had been at BBN but now > worked for ARPA directly, worked on a new protocol called Transmission > Control Protocol (TCP) that was general-purpose. They made the assumption > that the underlying network was unreliable. The new protocol shifted the > job of reliability from the network to the destination hosts. > > Originally TCP handled the routing of packets also. TCP had jobs that we > would today assign to the network and transport layers. > > And finally, in 1978, we come to the birth of the Internet Protocol (IP). > In 1978, the job of routing packets was broken away from TCP. TCP was given > the task of breaking messages into packets, reassembling them at the other > end, detecting errors, resending anything lost, and putting packets in the > right order. IP was simply responsible for forwarding individual packets. > The specifications for how this should work were written by Cerf at UCLA, > and Postel and Cohen from the University of Southern California's > Information Sciences Institute (ISI). > > In the early 1980s, the ARPANET got really congested and the National > Science Foundation created its own network for the academic computer > science community. It used TCP/IP and is sometimes considered the real > forerunner of "the Internet," although it probably could never have > happened without the work that went into the ARPANET. ARPANET converted to > TCP/IP in 1983. It also divided into MILNET and ARPANET. It had > connectivity with all the other networks by then. Later it got > decommissioned. By 1989, it was gone, but its legacy lived on. May it RIP. > ;-) > > Here's a recommendation for a terrific book about the history of the > Internet: > > "Where Wizards Stay Up Late: The Origins of the Internet" by Katie Hafner > and Matthew Lyon. I'll definitely read that book, as I love that kind of stuff. > > Priscilla > > >, and maybe TCP/IP was derived from > >these early protocls, but to say the the DoD, or BBN or anyone other than > >the Internet community wrote TCP and IP would be incorrect, right? I seem > >to remember that IP was used in ArpaNet, but not TCP. I thought TCP was > >written in various universities. I could even look up the couple (who used > >to work at Cisco) who wrote it. > > > >-- > > > >RFC 1149 Compliant. > >Get in my head: > >http://sar.dynu.com > ________________________ > > Priscilla Oppenheimer > http://www.priscilla.com Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=39684&t=39657 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
