Design 121 by 121 two-stage switch by using 11 by 11 primary and secondary
a) What is the total number of such switches and cross points in the two-stage
b) If a mixing stage is added to the two-stage network, what is the number of
switches and cross points in the network? What is the number of alternate
c) If instead a distribution stage was added to create a three-stage network, what
will be the overall size of the switch, total number of switches and what will
be the total number of cross points.
2. a) What is wide-sense non-blocking?
b) A three-stage switching structure is to accommodate N=256 input and 256
output terminals. For 32 first stage and 32 last stage, determine the number of
crosspoints for non-blocking