Source : Free On-Line Dictionary of Computing

Berkeley Network
     
        (B-NET) Top level {Unix} {Ethernet} software developed at the
        {University of California at Berkeley}.  There are no formal
        specifications but UCB's {4.2BSD} {Unix} implementation on the
        {VAX} is the de facto standard.  Distributed by {Unisoft}.
        Includes net.o driver routines for specific hardware, {pseudo
        tty}s, {daemons}, hostname command to set/get name, /etc/hosts
        database of names and {Internet address}es of other hosts,
        /etc/hosts.equiv host-wide database to control remote access,
        .rhosts per user version of hosts.equiv.
     
        UCB's implementation of the {Internet Protocol} includes
        trailers to improve performance on paged memory management
        systems such as {VAXen}.  These trailers are an exception to
        the Internet Protocol specification.