Xref: utzoo rec.humor.d:1268 news.misc:2235 Path: utzoo!utgpu!watmath!clyde!ima!think!barmar From: barmar@think.COM (Barry Margolin) Newsgroups: rec.humor.d,news.misc Subject: Re: USENET and Internet (was: Re: Yes, I can sell a jokebook via USENET. Message-ID: <32542@think.UUCP> Date: 2 Dec 88 22:04:04 GMT References: <2391@looking.UUCP> <79090@sun.uucp> <1057@ncar.ucar.edu> <376@eda.com> <79319@sun.uucp> <380@eda.com> <2424@looking.UUCP> Sender: news@think.UUCP Reply-To: barmar@kulla.think.com.UUCP (Barry Margolin) Organization: Thinking Machines Corporation, Cambridge MA, USA Lines: 29 In article <2424@looking.UUCP> brad@looking.UUCP (Brad Templeton) writes: >I think Chuq means the ARPANET - the network paid for by the DCA. > >The Internet includes lots of people beyond this. Well, if we need to be that precise, then let's get it right. What he probably means is the Defense Data Network (DDN). The DDN is made up of two physical networks, Arpanet and Milnet. Arpanet is for research institutions doing work for DARPA, Milnet is for actual US military installations. The DDN came into being when we switched from NCP to TCP/IP in 1983. Before then the entire network was called Arpanet. The intent of the distinction was that networking research could continue on the Arpanet, while Milnet would be a stable network for production sites. For example, the switch to domain style names and use of name servers has been much faster on the Arpanet than Milnet, and a change to the PSN (the processors that connect hosts to the two networks) software that has been running on the Arpanet for a year is just now being run in test mode on Milnet. Also, the gateways between the Arpanet and Milnet were envisioned as only passing mail through, rather than allowing full connectivity; as far as I know, this has not yet been done. Barry Margolin Thinking Machines Corp. barmar@think.com {uunet,harvard}!think!barmar