ipc vs socket prg

what is different between ipc and socket programming .
when we use ipc?
when we use socket programming?

 

IPC is for communication between processes. Let me recommend Beej's guides; there's one for each.

 

what about socket prg

 

can we communicate with remote system using only ipc?

 

As I mentioned, Beej has tutorials for BOTH. I suggest your read them or something similar. When a person posts multiple posts in a row (particularly on frequent occassions) I know that person is shooting from the hip. By that, I mean not thinking clearly and thoroughly, but just tossing each random thought at the forum. That is a waste of our time, and yours.