HP Rp3440-4 - 9000 - 0 MB RAM Programmer's Manual page 151

Using UNIX Domain Datagram Sockets
Preparing Address Variables
The server process only needs one address for its socket. Any process
that knows the address of the server process can then send messages to
it. Thus, your client process needs to know the address of the server
socket. The client process will not need an address for its own socket,
unless other processes need to refer to the client process.
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