“Client/Server Rendezvous on the LAN” reminds us to not forget about security while we’re sipping the rendezvous kool-aid:

” The moral is this: only use broadcast/response-based rendezvous mechanisms when security is really, truly of no concern to your application–in environments where either the physical network is secure, or applications where no sensitive information can possibly be transmitted, no harm can be caused by missing or tampered messages, and the protocol is robustly validated (on both sides).”