(B-NET) Top level UnixEthernet software developed at the University of California at Berkeley. There are no formal specifications but UCB' s 4.2BSDUnix 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 addresses 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.