Originally Posted by
CommonTater
Multicast is a technique of sending identical packets to multiple clients (hense it's name)... Basically clients contact the server and their IP addresses are added to a list of recipients. When a packet needs to be sent, copies go to each recipient... While this seems like a perfectly sensible way of doing things, you need to appreciate that with 12,543,000 clients, for every packet you receive, the server has to send 12,543,000 uniquely addressed packets... Good idea but horridly inefficient.