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Q. What is Bens Network?
It's a non-blocking network. It's a special type of Clos network where first and last stage consists of 2×2 switches (for n input and m output network it will have n/2 switches of 2 ×2 order and the last stage will have m/2 switch of 2×2 order the middle stage will have two n/2 Χ m/2 switches. Numbers n and m are should be the power of 2.
Thus, for 16×16 3-stage Bens network first stage and third stage will consist of 8 (2×2) switches and middle stage will consist of 2 switches of size (8×8). The association of crossbar would be as follows:
Figure: 16X16 3-stage Benz network
The switches of several phases present complete connectivity. So by appropriately configuring the switch any input can be passed to any output. Think about a Clos network with 3 stages and 3×3 switches in every phase.
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