单项选择题
The maxmbuff is low by default for systems expecting high network traffic and/or usage. Which of the following utilities should be used to report requests for mbufs that have failed and/or been denied？（）
A. no B. ping C. netstat D. ifconfig
单项选择题 WhichofthefollowingcommandsshouldbeusedtodeterminewhichdiskofasystemisexperiencingadiskI/Operformanceproblem？（）
单项选择题 Whichofthefollowingcommandscanbeusedtocleanupafailedsoftwareinstallationprocess？（）
单项选择题 Whichofthefollowingcommandscanbeusedtoreviewthesystemerrorlogs？（）
