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From: jdd@allegra.UUCP
Newsgroups: net.unix-wizards
Subject: Re: Why datagram service is unreliable
Message-ID: <2225@allegra.UUCP>
Date: Thu, 19-Jan-84 16:55:25 EST
Article-I.D.: allegra.2225
Posted: Thu Jan 19 16:55:25 1984
Date-Received: Sat, 21-Jan-84 02:23:46 EST
References: <15696@sri-arpa.UUCP>
Organization: AT&T Bell Laboratories, Murray Hill
Lines: 14


    The design decision that datagram service is unreliable was made by
    DOD, in the TCP/IP protocol. This is what 4.2 implements.  Over
    (say) a local network, the chances of a datagram being garbled or
    lost are very slim. The virtual circuit service (TCP) is implemented
    by using the datagram service (IP) with sequence numbers and
    acknowledgements; there is, of course, a speed penalty for this.

Another off-the-wall reply.  The 4.2BSD \Internet/ domain implements TCP/IP;
I'm talking about the \UNIX/ domain.

Cheers,
John ("Can Anybody Here Read?") DeTreville
Bell Labs, Murray Hill