How come Apple Bonjour (Formerly Rendezvous) is unable to locate devices and services that are on th...
You may find the above article useful in regards to the setup.
As far as network costs, multicast in itself is actually a bandwidth-conserving technology because it allows one host to send traffic to multiple hosts without noisy broadcasts. However, multicast is typically used for streaming services; streaming adds a lot of overhead.
As stated previously, broadcast is noisy due to the fact that the messages must be sent out every port, hence the name. Excessive broadcasts can add a lot overhead.
