单项选择题
A. trace
B. netstat
C. ifconfig
D. nslookup
单项选择题 Whenmonitoringasystemusingvmstatwithaninterval，themetricsunderpageporepresentwhichofthefollowingphrases？（）
单项选择题 While monitoring a system that is CPU bound， which of the following output is most likely to occur？（）
单项选择题 Whichofthefollowingcommandsshouldbeusedtoreportstatisticsonnetworkprotocolsusedbythesystem？（）