单项选择题
Which DHCP allocation method allows automatic reuse of an address that is no longer needed by the lient to which it was assigned？（）
A.Automatic
B.Dynamic
C.Reuse
D.Manual
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A.telinit -q
B.startsrc -s bootpd
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Whatistheproperwaytoensurethatupdatestothe/etc/aliasesfileareseenbysendmail？（）
A.Refresh the named daemon
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单项选择题
Whatistheproperwaytorefreshsendmail？（）
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