The document discusses interprocess communication in distributed systems. It introduces four widely used communication models: remote procedure call (RPC), message-oriented middleware (MOM), stream-oriented communication, and multicast communication. RPC allows processes to call procedures located on other machines transparently. MOM supports persistent asynchronous communication through message queues.

1. Chapter 4 - Communication

15. an adapted reference model for networked communication

22. original message on the Pentium (the numbers in boxes indicate the address of each byte) the message after receipt on the SPARC; wrong integer (2 24 +2 26 = 83,886,080), but correct string

39. socket primitives for TCP/IP both clients servers both Executed by Release the connection Close Receive some data over the connection Receive Send some data over the connection Send Actively attempt to establish a connection; the client is blocked until connection is set up Connect Block caller until a connection request arrives Accept Announce willingness to accept connections Listen Attach a local address to a socket; e.g., IP address with a known port number Bind Create a new communication endpoint Socket Meaning Primitive

42. some of the most intuitive message-passing primitives of MPI Check if there is an incoming message, but do not block MPI_irecv Receive a message; block if there are none MPI_recv Pass reference to outgoing message, and wait until receipt starts MPI_issend Pass reference to outgoing message, and continue MPI_isend Send a message and wait for reply MPI_sendrecv Send a message and wait until receipt starts MPI_ssend Send a message and wait until copied to local or remote buffer MPI_send Append outgoing message to a local send buffer MPI_bsend Meaning Primitive

48. the general organization of a message-queuing system with routers

55. movie as a set of simple streams