All of the following comprise the Performance Toolbox EXCEPT：（）

单项选择题Asmallcompanywouldlikehelpinidentifyinganapparentsystemperformanceproblemonitsinternalmailserver，especiallytodeterminepeakhourusage.Whatwouldbethefirststepinidentifyingtheproblem？（）

A. cd /var/spool/cron/crontabs，uncomment the lines in the adm file， in order to start gathering statistics.
B. cd /var/spool/cron/crontabs； uncomment the lines in the sys file， in order to start gathering statistics.
C. cd /usr/lib/cron/； vi the adm file； startsrc -s sadc
D. cd /usr/lib/cron/； vi the sys file； startsrc -s sadc

单项选择题Wherecantheperfagent.toolsfilesetbefound？（）

A. AIX Base CD
B. AIX BonusPak CD
C. AIX Performance Toolbox product CD
D. Performance AIDE product CD

单项选择题Whenthelengthoftherunqueues，processorthreaddispatchesinterrupts，andlockcontentionmetricsandstatisticsareanalyzedforperformance，whichofthefollowingresourcesisbeinganalyzed？（）

A. CPU
B. Memory
C. Disk I/O
D. Network I/O

单项选择题WhichofthefollowingfilesetsneedstobeinstalledinordertousetopasatAIXVersion5.x？（）

A. perfagent.tools
B. bos.perf.tools
C. bos.adt.samples
D. perfmgr.local

单项选择题ComprehensiveServiceLevelAgreementstypicallydonotaddress：（）

A. Roles & responsibilities
B. Headcount & budgets
C. Reporting policies
D. Penalites