通道实质上是主存与I/O设备之间的DMA接口在逻辑上的延伸。适合连

【名词&注释】

单选题(single-option)、数据传输速率(data transmission rate)、实质上(in essence)

[单选题]通道实质上是主存与I/O设备之间的DMA接口在逻辑上的延伸。适合连接多台低速设备的通道是

A. 字节多路通道
B. 选择通道
C. 数组多路通道
D. 块多路通道

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学习资料：

[单选题]Which of the following conditions will make a relation that is in first normal form. to be in second normal form?Ⅰ.every non-key attribute is functionally dependent on the full set of primary key attributes.

A. Ⅱ.no non-key attributes exist in the relation.
B. Ⅲ.the primary key consists of only one attribute.
C. Ⅰ only
D. Ⅰ and Ⅱ only
E. Ⅰ and Ⅲ only
F. any of them

[单选题]请教:2016计算机四级网络工程师高分突破试题单选题37如何解答?

IEEE 802.11b标准支持的最大数据传输速率是

A. 2Mbps
B. 11Mbps
C. 54Mbps
D. 100Mbps

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