Multicast communication in distributed systems
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In computer networking, multicast is group communication where data transmission is addressed to a group of destination computers simultaneously. Multicast can be one-to-many or many-to-many distribution. Multicast should not be confused with physical layer point-to-multipoint communication. Group communication systems commonly provide specific guarantees about the total ordering of messages, such as, that if the sender of a message receives it back from the GCS, then it is certain that it has been delivered to all other nodes in the system. Multicast IP Routing protocols are used to distribute data (for example, audio/video streaming broadcasts) to multiple recipients. Using multicast, a source can send a single copy of data to a single multicast address, which is then distributed to an entire group of recipients.