單項選擇題

A system administrator ran the iostat command because of system performance problems. The following iostat output is provided：

Based on the output， which of the following is insufficient？（）

A.CPU
B.Memory
C.Paging space
D.Disk capacityX

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單項選擇題

A system administrator is monitoring a system that has recently shown a decrease in performance. The administrator suspects there is an overload of traffic on a single Ethernet adapter. Which of the following commands is best to identify a possible overload of the Ethernet adapter？（）

A.ping
B.iostat
C.netstat
D.ifconfig

單項選擇題

A system administrator is monitoring a system that has recently shown a decrease in performance.The administrator suspects that the system may be low on memory and may be paging excessively.Which of the following commands is best to identify a possible paging problem？（）

A.iostat
B.netstat
C.ps
D.vmstat

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