单项选择题
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？（）
单项选择题 Whichofthefollowingcommandsshouldbeusedtosetnetworkattributesonacurrentlyrunningkernel？（）
单项选择题 Whichofthefollowingcommandsshouldbeusedtoviewandchangethenetworkfilesystemtuningparametersavailableonthesystem？（）