title: Which port number should be used for network example code?
body: <p>I've written a little Haskell network example, but i don't know, which port i should use.</p>
  
  <p>i couldn't find a example port number in the IETF papers i found or in <a href="http://en.wikipedia.org/wiki/List_of_TCP_and_UDP_port_numbers" rel="nofollow">Wikipedia's list of port numbers</a>, but maybe there is a common port number in the programming community.</p>