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Cross Bar: The crossbar network is simplest interconnection network. It has a double dimensional grid of switches. It's a Non-blocking network and offers connectivity between outputs and inputs as well as it's probable to combine any of the inputs to any output.
An N * M crossbar network is displayed in the subsequent Figure 1(a) and switch connections are displayed in Figure 1(b).
Figure: 1(a)
Figure: Crossbar Network
A switch located at the cross point of a specific row and specific column attaches that specific row (input) with column (output).
Hardware cost of N*N crossbar switch is proportional to N2. This creates delay equivalent to one switching operation and routing control mechanism is easy. Crossbar network necessitates N2 switches for N input and N output network.
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