In computer networking, it refers to broadcasting information from a single sender to a receiver. It makes use of session based IP delivery protocols like Transmission Control Protocol (TCP) and User Datagram Protocol (UDP). Furthermore, every receiver or customer connects with the server taking extra bandwidth. However, the customer has a direct connection with the server. For instance, you ask for the URL http://www.sky.com for your laptop. This should be received just by the SKY server and if not then the network will be disturbed by additional requests sent to other computers present in the network. This is why unicast broadcast is vital to networks and is guided by Ethernet and IP networks.
In this, source needs to transmit a data packet just once. The nodes in the network like routers facilitate the important copies of the transmitted data packets in order that it is received by a group of receivers. The intermediate routers move the packets to receivers who have made contact with them showing the intent to get data from that specific sender. IP multicasting is very well known multicasting implementations. Also the source does not require the information about the address of the receivers.