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UDP Broadcasting
UDP broadcasting provides a partial solution to these issues
Allows a single transmission to be delivered to all applications on a network who are receiving on a particular port
Useful for small net-VEs
Expensive
every host on network must receive and process every broadcast packet
Not used for large or internet based VEs (use IP Multicast)
Again subject to the usual suspicion from your local network administrator
No way to use it over the public internet
Use of a bit mask representing the subnet of hosts that should receive that message : control of the scope or range of the broadcast.
For instance, to broadcast only on the escience lab network (150.203.164.*), one should use the mask 150.203.164.255
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