SWITCHING
A switched network consists of a series of interlinked nodes, called switches. They are capable of creating temporary connections between two or more devices linked to the switch but not to each other. Three methods of switching: Circuit switching Packet switching Message switching Circuit switching It creates a direct physical connection between two devices such as phones or computer. It is mostly used at the physical layer to create real circuits between source & destination. Real circuits were designed for real-time audio (telephony). In this fig the network has switches that allow traffic from sources to destinations. A source & destination can be a computer,router,bridge,or any other device that connects other networks. Packet switching For data communication, packet switching networks were designed; data are packetized and sent packet by packet. The main difference between a circuit switched & packet switched network is that the lin