On 4/4/2010 09:57, Jorge Amodio wrote:
UUCP is not a descriptor of any kind of a network in any engineering sense that I know of. It is a point-to-point communications protocol.
You should revise some of the history behind it. It was a descriptor for a very large network, it was even a TLD in the mid eighties when the transition to DNS was taking place, the old bang style addresses like mine original seismo!atina!pete transitioned for a while to pete@atina.UUCP and later to pete@atina.ar.
I agree with some of this and most of the following, but I think the problem is not so much my history as it is the drift in definitions. And I do not pretend to any special authority in the area. But when I think of "network" I think of things like the PSTN, ABC, Mutual, California's DOJ torn-tape TTY, and FIDO where the message to be delivered was the focus and the internal works were pretty much uninteresting to the "user".
UUCP was not just a point to point protocol. Originally it was a set of utility programs to permit copying files between Unix systems (Unix to Unix CoPy, hence the name), since electronic emails where essentially files UUCP became the transport mechanism for both electronic email and later Usenet News.
CoPy is the only decode that ever occurs to me. And the file view of the world is correct and I had forgotten it.
Some referred to UUCP as Unix to Unix Communications Protocol, not quite right but yes one of the pieces of UUCP (uucico = Unix to Unix Copy in Copy Out) implemented different type of communication protocols negotiated during the initial handshake phase and fine tuned to different communication facilities, point to point, telephone modems, specific modems such as Telebit Trailblazers with PEP, different types of encapsulation using X.28, X25, and obviously TCP/IP.
For several years until we've got a more decent telecommunications infrastructure UUCP was all we had in Argentina to let the academic and science community reach out and communicate with their colleagues around the world, we had an adapted version of the UUCP implementation for DOS (some called it UUPC) that became very popular and enabled our "UUCP network" to reach over 800 nodes in the early 90's when we later were able to get a direct (IP) connection to the rest of the world.
My .02
Mine is that while "UUCP" took on a networkish patina in recent years (I know a place here in town that still uses it, or did when I last had contact with them a few years ago). But in it origins, UUCP was no more a network function that "cp" is today. (Hmmm....interesting digression. Was there NFS before there was IP? Seems like it, but I don't remember how it worked.) With UUCP you had to dial somebody up, say howdy (sometimes human to human) and issue the copy command. Sure enough, frequent users had cron jobs and scripts to do all that. And sure enough, co-operative sites would strip their own names off the beginning of a bang path and pass the file to the next in line, the next time they talked to them. Which might be anywhere from a few seconds to never from now. -- Democracy: Three wolves and a sheep voting on the dinner menu. Requiescas in pace o email Ex turpi causa non oritur actio Eppure si rinfresca ICBM Targeting Information: http://tinyurl.com/4sqczs http://tinyurl.com/7tp8ml