单项选择题

A.pingB.iostatC.netstatD.ifconfigAsystemadministratoris……

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

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单项选择题Asystemadministratorismonitoringasystemthathasrecentlyshownadecreaseinperformance.Theadministratorsuspectsthatthesystemmaybelowonmemoryandmaybepagingexcessively.Whichofthefollowingcommandsisbesttoidentifyapossiblepagingproblem？（）

A.iostat
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A.ksh -n nextboot
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D.diff $（vmtune） /etc/tunables/nextboot

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