单项选择题
Which of the following metrics provided by the iostat report is used to initially determine if a system is I/O bound？（）
A. % idle B. % sys C. % user D. % iowait
单项选择题 Whichofthefollowingtoolsshouldbeusedtoreportin-depthinformationaboutfilefragments？（）
单项选择题 Whichofthefollowingperformancetoolscanbeusedtodetermineifasystemisthrashing？（）
单项选择题 Whichofthefollowingcommandsisusedtodisplaydetailedethernetstatisticsforent0？（）
