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amolakn

You had mentioned in lecture that Message Passing is sometimes used across Wifi networks. Are there any real-world examples of that? Is it just the general concept applied to when a client is waiting for a response at a socket?

bob_sacamano

How does message routing exactly happen in a message passing system? Is it that all message-passing enabled threads form a "network" of routing nodes that forward messages to each other? Or does the MPI library provide software-level route computation and inform the hardware to populate the incoming buffer of the PID to which the thread belongs?

bpr

@bob_sacamano, MPI could just use sockets and TCP/IP to send between different machines. And can use shared memory APIs when communicating on the same machine.