The rate of communication speed between microprocessor and RAM is known as BUS speed.
They are segregated into five classes Class A === 0 -126 ( 127 is reserved for loop back) Class B ==== 128- 191 Class C ==== 192-223 Class D ==== 224-239 Class E ==== 240-255
SCSI stands for Small Computer System Interface. It is a standard electronic interface that allows personal computers to communicate with peripheral hardware such as disk drives, tape drives, printers, CD-ROM drives. In “SCSI” the rate of data transmission is fast.