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FCM will consist of three separate modules, which will each run concurrently.
The Router and Receiver modules each run on different computers, and share
data through the TCP packets sent from Router to Receiver. The queue logging
module may also be run concurrently on the Router, in which case it will
interact through the /proc filesystem. This concurrent operation of the
three modules occurs because they each perform an independent function, with
only minimal interaction required. The interactions between these modules are
explained in Section 5.5.