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In a crossbar with 1000 crosspoints, how many statistically are in use at any time ?

  • A.100
  • B.250
  • C.500
  • D.1000

Answer: B

Correct answer: 250

Crossbars are dimensioned on the observation that only about a quarter of the crosspoints are needed at once, since not every input is active and each active one uses a single crosspoint. For 1000 crosspoints that is 250.

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