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

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

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

A. no
B. chdev
C. vmtune
D. schedtune