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Practice Questions: SCSI Cable Length

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Q4.What is the maximum cable length allowed for Single Ended (or Unbalanced) signaling system used by SCSI?

1. 3m
2. 12m
3. 25m
4. 6m

Correct Answer: D.

 Explanation: Single-ended devices are more prone to picking up interference and noise so the cable length is set at a limit – 6 meters or approximately 20 feet.
Cable lengths used by SCSI devices are:
Single Ended (or un balanced) electronic signaling: 6 m 0r 20ft (apx.)
Differential signaling (HVD-High Voltage Differential): 25 m or 82 ft (apx.)
Differential signaling (LVD - Low Voltage Differential): 12 m

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