The simplest multiplexing technique is __________ synchronous time division dense wavelength frequency division time division The "B" channels of ISDN basic rate interface carries ______ data voice controls both a & b ________ are inserted between two signals to provide a form of insulation and to keep one signal from interfering with another signal Shielding insulation Guard bands Padding Time division multiplexing was split into __________ time division multiplexing synchronous asynchronous statistical both a & c To maintain synchronization between sending multiplexor and receiving demultiplexor, the data from the input sources are often packed into a simple frame with synchronization _________ added somewhere with the frame. controls data bits bytes What is the minimum necessary speed of the line leaving a statistical multiplexor if 10 computers are connected to the multiplexor Assume Each computer at 1500 kbps and at any point in time and 40% of the workstations are not transmitting. 10000 kbps 2000 kbps 6000 kbps