Which of the following commands should be used to determine DNS name resolution performance？（）

单项选择题Inaniostatreport，whichofthefollowingoptionsbestdescribesthevalueof%idle？（）

A. A representation of the equation （tps/kbps）*100
B. The percentage of time the disks are idle with no activity
C. The percentage of time the disks are idle with no outstanding CPU requests
D. The percentage of time the CPU is idle with no outstanding disk I/O requests

单项选择题Whichofthefollowingtoolsshouldbeusedtoreportcurrentnetworkstatusandisoftenusedtocheckthereliabilityofanetwork？（）

A. netpmon
B. netstat
C. nfsstat
D. vmstat

单项选择题Whichofthefollowingcommandsshouldbeusedtosetnetworkattributesonacurrentlyrunningkernel？（）

A. no
B. chdev
C. vmtune
D. schedtune

单项选择题Whichofthefollowingcommandsshouldbeusedtoviewandchangethenetworkfilesystemtuningparametersavailableonthesystem？（）

A. no
B. nfso
C. vmtune
D. exportfs

单项选择题Whichofthefollowingcommandsdisplaysthenumberofsystemcallspersecondthatarebeingexecuted？（）

A. sar
B. pstat
C. iostat
D. filemon