One thing to consider - how quickly do you need to know whether the node on the other end has gone off to see the wizard? With TCP, it might be a while - you m

One thing to consider - how quickly do you need to know whether the node on the other end has gone off to see the wizard? With TCP, it might be a while - you may not get notification that he's gone until he comes back. So you end up with keepalives, and... might as well have used UDP if your media can stand it.