单项选择题
An administrator notes that after a recent power outage, some open files were corrupted on one affected file server. Which of the following items should the administrator consider to determine the cause of this corruption?（）
A. The server's memory
B. The server's RAID controller battery
C. The server's processor
D. The server's NIC teaming configuration
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AdiskdrivefailedinaRAID5array.Afterreplacingthediskdrive，usersarestillreportingthat accesstotheserverisveryslow.WhichofthefollowingBESTexplainstheproblem？（）
A.The array is rebuilding.
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C.The array is corrupt.
D.The disk drive is not compatible. -
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WhichofthefollowingservertypesperformsthesamefunctionastheHOSTSfile？（）
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AcompanyhasrecentlyswitchedISPsandisbeingassignedanewblockofpublicaddresses.ThepublicwebandFTPserversmustbere-addressedtosupportthischange.AfterchangingIP addressesandupdatingtheDNSrecordsmanycustomershavereportedthattheyarenotableto accesstheweborFTPservers.Whichofthefollowingcouldhavebeendonepriortomaking thesechangestomakeitmoretransparenttousers？（）
A.Reduce the TTL on the DHCP records.
B.Configure a primary DNS server for the PTR records.
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