exchange (DX) is the basic function for selecting the transmission path in all network concepts. It is used to transmit data from a sending station to receiving stations. Depending on the type of switching technology
, adistinction is made between line
switching, inwhich a connection
isswitched between the sending and receiving station, memory switching, in which the data is temporarily stored, data packet and cell switching, in which the paths through the network
areswitched on the basis of the addresses in the data packet, or message switching
. Switchingswitching nodes in circuit switching, the hubs, switches and routers in local networks, the routers, gateways and exchange points in wide area networks and the access points and WLAN routers in wireless LANs.