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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.
Packet. A term first coined by Donald Davies in 1965, a packet is a segment of data sent from one computer or device to another over a network. A packet contains the source, destination, size, type, data, and other useful information that helps packet get to its destination and read.Below is a breakdown of a TCP packet. When a packet is transmitted over a network, network routers and switches examine the packet and its source to help direct is direction. 2  During its transmission, network packets can be dropped. 3  If a packet is not received or an error occurs, it is sent again.