I was reading the answer to this question:
[How to transfer files from one computer to another over the network using Java?](https://stackoverflow.com/questions/1109307/how-to-transfer-files-from-one-computer-to-another-over-the-network-using-java)

and I didn't understand part of jjnguy's answer. What should the LISTENING\_PORT be? How do you decide what port to use? And what is CONNECTION\_ADDRESS? 

I realize these are very basic networking questions, so maybe someone can point me in the direction of a good tutorial?