how socket communication happens on same port?

From: rahul8143 (rahul8143_at_gmail.com)
Date: 03/31/05 

Date: 31 Mar 2005 03:40:38 -0800

Hello all,
     If i run tcpserver on pc1 with port 9200 ,tcpclient on pc2 with
9200 and same in reverse tcpclient on pc1 ,tcpserver on pc2 on 9200.
How can both programs work on same port without problem?
    why it not require to have different port to read/write to sockets
from pc1 to pc2 and pc2 to pc1?
regards,
rahul.

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