Explain the Message Passing model of inter$-$process communication $($IPC$).$ Be sure to include each of these:

$$ Send$($message$)$

$$ Receive$($message$)$

$$ Communication link

$$ Direct and indirect

$$ Symmetric and asymmetric addressing

$$ Synchronous and Asynchronous and Rendezvous

$$ Automatic and Explicit buffering

$$ Buffering