Constant number of processes, variable number of threads.
One acceptor thread per process, multiple workers threads.
winnt ......... Single Process Model with Threading on Windows NT
+ event ......... Multi Process model with threads. One acceptor thread,
+ multiple worker threads, separate poller threads for idle
+ connections and asynchoneous write completion.
worker ........ Multi Process model with threads. One acceptor thread,
multiple worker threads.
netware ....... Multi-threaded MPM for Netware