The files in this directory contains a version of the REAL 4.0 network simulator which has been modified to implement the rate-based congestion control scheme described in the Ph.D Thesis by Warren Toomey, submitted to the University of New South Wales, Australia, in 1997. This modified simulator is known to run on SunOS 3.5 and FreeBSD 2.X. It is known NOT to run on Solaris, Linux or any Microsoft operating system. URLs for the thesis, and the original REAL simulator follow: http://minnie.tuhs.org/PhD/ ftp://minnie.tuhs.org/PhD/ http://minnie.tuhs.org/REAL/index.html http://simon.cs.cornell.edu/home/skeshav/real/overview.html Warren, wkt@tuhs.org, December 1997