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Bus switch is a switch with a single high speed bus that is shared by all incoming and outgoing ports on a time division multiplexing (TDM) basis. Multiplexer/de-multiplexer are analog switches that provide high speed switching. The low "ON" resistance of these FET switches allow inputs to be connected to outputs without adding propagation delay or generating additional ground bounce noise. This is a relatively low cost approach commonly used in smaller, local area network (LAN) workgroup switches where issues of congestion typically are relatively modest.