what is the difference?

Hi,
I would like to know the difference (if any) between developping a communication system and developing a network?
Can I have some clarification . My search did not give me a satisfactory answer.

Thank you

A network is like having roads.
A communication system is like sending trucks on roads in order to exchange goods.

Ok thank you olivthill2.

Hello someone out there
How about telecommunication system and communication system and information exchange system? network system and networking system and distributed and distribution system ?

Yes.

I am sure all the words i took from books, not what i made up myself :(

I have another doubt : What is the differnce between distributed computing/system and grid computing/system ? is it grid stuff a new clothe for an old body (distributed)
one day i can get back to school, i will sleep in the libraries all daynight

Why you learn difficult things ? Define me what is a server please... mihhee :D
What server is usually used with what server ? :D