Which command records the path taken by network packets between a source and destination system? （）

Whichofthefollowingcommandsshouldbeusedtoobservethenumberofsystemcallspersecond?（）

A. sar 
B. iostat 
C. svmon 
D. vmstat

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AllofthefollowingtypesofstatisticsarereportedbytheiostatcommandtoolEXCEPT:（）.

A. Free memory
B. CPU statistics 
C. Disk statistics 
D. Terminal statistics

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