单项选择题

Which of the following commands should be used to show DNS information？（）

A. trace
B. netstat
C. ifconfig
D. nslookup

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单项选择题

When monitoring a system using vmstat with an interval， the metrics under page po represent which of the following phrases？（）

A. The number pages over the limit
B. The pages to paging space per second
C. The number of page operations per second
D. The number of processes waiting for page out

单项选择题

While monitoring a system that is CPU bound， which of the following output is most likely to occur？（）

A.A
B.B
C.C
D.D

单项选择题

Which of the following commands should be used to report statistics on network protocols used by the system？（）

A. lsattr
B. pstat
C. netstat
D. ifconfig