Named Pipe Channel
This channel provides communication between a client and server using the Windows Named Pipes feature. Named pipe is recommended for communications between processes on the same computer, especially when run via separate users. This could be useful, for example for service control.
Please refer to the MSDN documentation on Named Pipes for more details.
Tip: one important to bear in mind: Windows has a set limit for the number of clients connected to a named pipe at once - 5 for Home, 10 for Pro. TCP/IP is a better alternative if you want to run a network server.