In the packet switching network type on specific path is used for data transfer. Instead the data is chopped up into small pieces called packed and sent over the network. We can route combine or fragment the packets as required to get them to their eventual destination. One the receiving end the process is reversed the data is read from the packets and reassembled to form the original data. A packet switched network is more analogous to the postal system that if is to the telephone system through the comparison is not perfect. An example is shown in figure
In a packet switched network no circuit is set up prior to sending data between devices. Blocks of data even from same file or communication may take any number of paths as they journey from one device to another.
figure Packet switching