multicast
Multicast is a communication method used in computer networks where data is sent from one source to multiple destinations simultaneously. Unlike unicast, which sends data to a single recipient, multicast allows efficient use of bandwidth by transmitting a single copy of the data to multiple users who have expressed interest in receiving it.
In multicast, data is sent to a specific group of devices identified by a unique IP address. This technique is commonly used in applications like video conferencing, streaming media, and online gaming, where many users need to receive the same information at the same time without overwhelming the network.