To answer this question, we need to understand the different types of data transfer modes in SCSI (Small Computer System Interface).
Fast SCSI refers to the implementation of the SCSI protocol that allows for higher data transfer rates. One of the key features of Fast SCSI is the use of synchronous data transfer.
Option A) Asynchronous Data Transfer - This option is incorrect because Fast SCSI does not use asynchronous data transfer. Asynchronous data transfer mode allows for variable data transfer rates and is typically used in slower SCSI implementations.
Option B) Synchronous Data Transfer - This option is correct because Fast SCSI uses synchronous data transfer. Synchronous data transfer mode allows for a fixed data transfer rate, which helps to achieve higher transfer speeds in Fast SCSI.
Option C) Semi-synchronous Data Transfer - This option is incorrect because Fast SCSI does not use semi-synchronous data transfer. Semi-synchronous data transfer is not a standard data transfer mode in SCSI.
Option D) None of the Above - This option is incorrect because Fast SCSI does use synchronous data transfer.
The correct answer is B) Synchronous Data Transfer. This option is correct because Fast SCSI uses synchronous data transfer to achieve higher data transfer rates.