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packet switching. n. A method of data transmission in which data is broken into small blocks that are transmitted over different channels and are reassembled into their original order at their destination.
Circuit Switching 1  : Transmission of packets from a source machine to a destination machine is done on a per sourceâdestination pair basis, meaning that all packets from the same source going to the same destination are transmitted over the same routes and through the same routers. 2  Different packet reached their destination in order.