单项选择题

Which of the following BEST describes a virtual machine？（）

A.Host
B.VDI
C.Hyper-V
D.Guest

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单项选择题

Which of the following server clusters offers increased availability， performance， and scalability？（）

A. Passive/active
B. Active/passive
C. Passive/passive
D. Active/active

单项选择题

Which of the following BEST describes a NAS？（）

A.A collection of disks presented as storage to a single server through an existing network.
B.A collection of disks presented as storage to a single server through directly attached technologies.
C.A collection of disks presented as storage to multiple servers through dedicated channels.
D.A collection of disks presented as storage to multiple servers through an existing network.

单项选择题

Which of the following replication methods provides a disaster recovery system with minimal downtime to normal operations？（）

A. Cold site
B. Warm site
C. GFS
D. Hot site