单项选择题

AnetworkadministratorprovidesanIPaddressof128.135.0.142andasubnetmaskof255.0.0.0.Onceapingisattempted，itfails.Whichofthefollowingoptionsisthemostprobablecauseofthefailedping？（）

A.0isnotvalidinanIPaddress
B.128isareservednetwork
C.Thesubnetmaskshouldbe255.255.0.0.sinceitisaclassB
D.AnetworkproblemhasoccurredsinceIPandsubnetarevalid

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单项选择题

Whichofthefollowingreasonsindicatewhyitisimportanttohavetheuserdemonstratethetasktheyaretryingtoperform?（）

A.Tohelpthetechnicianlearnhowtoperformthetask
B.Todetermineiftheuserisperformingthetaskproperly
C.Todetermineiftheuserisauthorizedtoperformthetask
D.Tohelpthetechniciandetermineifthereisabetterwaytoperformthetaskinquestion

单项选择题

Aftercompletinganinstallationofnewsoftware，asystemadministratornoticesthesystemisslow.Totroubleshoottheperformance，whichsingleAIXcommandcouldbeusedtoprovideareal-timedisplayofCPU，memoryanddiskutilization（）
A.topas
B.vmo
C.iostat
D.netstat

A.Totroubleshoottheperformance，whichsingleAIXcommandcouldbeusedtoprovideareal-timedisplayofCPU，memoryanddiskutilization（）
A.topas
B.vmo
C.iostat
D.netstat

AnetworkadministratorprovidesanIPaddressof128.135.0.142andasubnetmaskof255.0.0.0.Onceapingisattempted，itfails.Whichofthefollowingoptionsisthemostprobablecauseofthefailedping？（）

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Whichofthefollowingreasonsindicatewhyitisimportanttohavetheuserdemonstratethetasktheyaretryingtoperform?（）

Aftercompletinganinstallationofnewsoftware，asystemadministratornoticesthesystemisslow.Totroubleshoottheperformance，whichsingleAIXcommandcouldbeusedtoprovideareal-timedisplayofCPU，memoryanddiskutilization（）A.topasB.vmoC.iostatD.netstat

Aftercompletinganinstallationofnewsoftware，asystemadministratornoticesthesystemisslow.Totroubleshoottheperformance，whichsingleAIXcommandcouldbeusedtoprovideareal-timedisplayofCPU，memoryanddiskutilization（）
A.topas
B.vmo
C.iostat
D.netstat