WhichofthefollowingdevicescouldbeconfiguredasaDHCPserver?（）
A. Wirelessrouter
B. Unmanagedswitch
C. Hub
D. Repeater
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下列不属于变量子类型的有（）
A. Empty表示数据未被初始化
B. Integer表示-32，768到32，767之间的整数
C. Single单精度浮点数，而Double表示双精度浮点数
D. String表示字符串数值，字符串的最大长度可为200个字符
Which of the following are attributes of a hardware-based RAID controller？（）
A. Backs up data
B. Less expensive than software RAID
C. Vendor neutral implementation
D. Accessible through a BIOS interface
E. More host CPU usage than software RAID
F. Accessible through a system utility after the OS has been loaded
G. May retain data in the event of a power outage
Which of the following is the MOST important consideration before making a change to a server？（）
A. Explore the ramification of the change before implementation.
B. Determine the service level agreement in place before implementation.
C. Review the equipment disposal procedures and policies before implementation.
D. Notify all staff members of the planned system outage before implementation.
企业对政府的电子商务通常称为（）。
A. BtoC
BtoB
C. BtoG
D. CtoC
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