Louis Pouzin at INRIA coined the term datagram for use in his CIGALE/CYCLADES network around 1974.
vint At 07:17 PM 9/23/2002 -0700, Dave Crocker wrote: >At 06:46 PM 9/23/2002 -0700, Fred Baker wrote: >> A packet is a unit of data carried in a packet network, > >this just moves the question over the definition of a packet network. (I was trying >to compress things.) > > >> regardless of the layer. For some reason, we generally refer to layer two packets >as 'frames' (such as Ethernet, Frame relay, or LAPB 'frames'), X.25 packets as >'packets', and TCP packets as 'segments'. > >please note your use of the word "generally". as I said, use of these terms is >flexible. > > >> I can point out literature that refers to each of those as 'packets'. > >that was my point. > > >>But a datagram is quite clearly defined. > >I believe the term datagram predates IP and seem to recall hearing it during the late >70's and early 80's in non-IP venues. > >The fact that it is well defined for one use does not mean that the definition is, >well, definitive. > > >>...from the application's perspective, a wad of data is directed to a specified >destination, and the application can essentially fire and forget. >> >>I could imagine the APEX folks using the term "datagram" in that latter sense. > >indeed locking the term down for Apex is probably the more useful path. > >(but it is slightly amusing that your definition is the same as I used for >packet-switching...) > >d/ > > >---------- >Dave Crocker <mailto:[EMAIL PROTECTED]> >TribalWise, Inc. <http://www.tribalwise.com> >tel +1.408.246.8253; fax +1.408.850.1850 Vint Cerf SVP Architecture & Technology WorldCom 22001 Loudoun County Parkway, F2-4115 Ashburn, VA 20147 703 886 1690 (v806 1690) 703 886 0047 fax
