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CompTIA Server+

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Which of the following is a prime difference between SCSI-1 and SCSI-2?
  1. SCSI-1 has a bus width of 8 bits, while SCSI-2 has a bus width of 16 bits.
  2. SCSI-1 has a bus width of 16 bits, while SCSI-2 has a bus width of 8 bits.
  3. SCSI-1 has a bus speed of 40 MHz, while SCSI-2 has a bus speed of 20 MHz.
  4. SCSI-1 has a bus speed of 20 MHz, while SCSI-2 has a bus speed of 40 MHz.
Explanation
Answer - A - SCSI-1 has a bus width of 8 bits, while SCSI-2 has a bus width of 16 bits.

Key Takeaway: SCSI-1 has a data bus width of 8 bits and has a maximum cable length of 20 feet. It supports up to eight devices and has a bus speed of 5 MHz, along with a maximum transmission speed of 5 MBps. SCSI-2 has a bus width of 16 bits and transfers data up to 10 MBps. It has a maximum cable length of 20 feet (6 meters) and a bus speed of 10 MHz.
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