三总线结构的计算机总线系统由（ ）组成。
- A.串行总线、并行总线和PCI总线
- B.系统总线、内部总线和外部总线
- C.数据总线、地址总线和控制总线
- D.CPU总线、内存总线和IO总线
正确答案及解析
正确答案
解析
计算机内部总线为三总线结构，它们分别是地址总线、数据总线和控制总线。数据总线：传送数据信息，CPU一次传输的数据与数据总线带宽相等；控制总线：传送控制信号和时序信号，如读/写、片选、中断响应信号等；地址总线：传送地址，它决定了系统的寻址空间。
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