- Shared memory permits processes to
communicate by simply reading and writing to a specified memory
location.
- Mapped memory is similar to shared memory,
except that it is associated with a file in the filesystem.
- Pipes permit sequential communication from
one process to a related process.
- FIFOs are similar to pipes, except that
unrelated processes can communicate because the pipe is given a name in the
filesystem.
- Sockets support communication between
unrelated processes even on different computers.
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five kinds of IPC methods
原文：http://www.cnblogs.com/feika/p/3614534.html
