35. Ordinary pipes in UNIX require a parent-child relationsh processes ip between the communicating 36. Ordinary pipes in Windows require a parent-child relationship between the communicating 37. Using a section object to pass messages over a connection port avoids data copying. 38. A socket is identified by an IP address concatenated with a port number. 39. Sockets are considered a high-level communications scheme. 40. The Mach operating system treats system calls with message passing