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The collision domain of tranditional Ethernet and Fast Ethernet respectively are

  • A.250m, 250m
  • B.250m, 2500m
  • C.2500m, 250m
  • D.2500m, 2500m

Answer: C

Correct answer: 2500m, 250m

Traditional 10 Mbps Ethernet allows a collision domain of about 2500 m. Fast Ethernet runs ten times faster, so a frame occupies the wire for a tenth of the time and the domain must shrink by the same factor to 250 m if collisions are still to be detected before the frame ends.

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