Quote from GTS:
I can't speak to what you need to do with a specific application because the application could contain code to detect the session going down and automatically retry to bring it back up on its own - in which case you wouldn't need to do anything.
But barring that kind of auto-detect/reconnect code, yes I think you are right, you would need to shutdown and restart the app (or at least logoff/logon).
Its not exactly equivalent (beacuse the IP address doesnt change) but try physically unplugging your ethernet cable sometime while connected on your platform, wait 30 seconds and then plug it back in and see how it handles it; better yet, reboot your cable modem (assuming this gives you a new IP address) and see what happens.