Two clients cannot use the same port. If one client uses port 4321 the other has to use different port.
A connection is identified by a tuple (protocol, source IP, source port, dest IP, dest port). That's how you can distinguish connections.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.