Given the following on a system that is not a name server， which will be the first area searched to resolve a host name to an IP address？（） 
#cat /etc/resolv.conf  
domain abc.century.com  
nameserver 192.9.201.1  
nameserver 192.9.201.2 
#cat /etc/netsvc.conf  
hosts = bind，nis，local  
#echo $NSORDER  
local，bind 

单项选择题AnAIXsystem，whichisrunningadatabase，ishavingperformanceissueswithI Owriting.TheDBAhasprovidednumbersfortheHIGHandLOWwatermarksforpendingfilewrites，whichwilloptimizethesystemforbestperformance.Tosetthesenumbers，whichofthefollowingcommandswouldbeused？（）

A. perfmon -h 30 -l 25
B. chdev
C. no -o
D. smit chgsys

单项选择题Inordertoensurebestreadperformance，whichofthefollowingindicateshowlargeanapplication’sreadbuffersizeshouldbeifthefilesystemtobereadisstripedacrossNdisksusingLVMstriping？（）

A. N times the stripe unit size
B. N times the VMM minfree parameter
C. The same value as that of the VMM maxfree parameter
D. The same value as that of  the VMM maxrndwrt parameter

单项选择题ATCP IPapplicationreceivesfilesfromaremotemachine.Theapplicationreads32kilobytesofdataatatimetothesocket，buthasnotissuedasystemcalltosetthewindowsize.Whichofthefollowingproceduresshouldbeperformedonthepersonalmachinetoincreasethethroughputoftheapplication？（）

A. Increase the size of thewall
B. Increase the size of sb_max
C. Increase the size of tcp_recvspace
D. Increase the size of tcp_sendspace

单项选择题Whichofthefollowingcommandsshouldbeusedtodeterminewhetheralogicalvolumeiscontiguousacrossadisk？（）

A. lslv
B. lsfs
C. lspv
D. fileplace

单项选择题Thermsscommandprovidesthefacilitytorunanapplicationoverarangeofmemorysizesanddisplaytheperformancestatistics.Howisthesimulatedmemoryresettotherealmemoryofthemachine？（）

A. rmss -c
B. rmss -p
C. rmss -r
D. rmss -s