问题详情

ATM when referring to computers is a dedicated, connection switching technology that organizes digital data into 53-byte(69)units and transmits them over a physical(70)using digital signal technology. ATM is capable oftransniitfing at speeds of 155 or 622 MBit/s and faster.
A．minuteness
B．toothful
C．cell
D．spot请帮忙给出正确答案和分析，谢谢！