Which DHCP allocation method allows automatic reuse of an address that is no longer needed by the lient to which it was assigned？（）

单项选择题AsystemadministratorhaseditedthenecessaryfilesforsetupofanAIXsystemtoserveasabootpserver.Whichofthefollowingcommandsisrequiredtocompletetheactivation？（）

A.telinit -q
B.startsrc -s bootpd
C.refresh -s inetd

单项选择题Whatistheproperwaytoensurethatupdatestothe etc aliasesfileareseenbysendmail？（）

A.Refresh the named daemon
B.Run the alias command
C.Refresh the snmpd daemon
D.Run the sendmail -bi command

单项选择题Whatistheproperwaytorefreshsendmail？（）

A.sendmail -bt
B.sendmail -ba
C.refresh -s sendmail
D.startsrc -s sendmail

单项选择题AclientcannotmountafilesystemfromanNFSserver.Whichofthefollowingoptionsisthemostprobablecauseforthemountfailure？（）

A.Server is not running  rpc.lockd
B.Client is not running the rpc.statd
C.Filesystem not exported by the server
D.Client nfsd daemons are all inoperative

单项选择题Onasystemwidebasis，whichofthefollowingproceduresisbesttomakeNISnameresolutiontakeprecedenceoverDNS？（）

A.Remove the /etc/resolv.conf file
B.Unset the NSORDER environment variable
C.Add the following line to /etc/netsvc.conf： hosts=nis，bind，local
D.In a NIS and DNS environment， NIS takes precedence so there is nothing to change