单项选择题
A./etc/rpc
B./etc/rc.net
C./etc/rc.tcpip
D./etc/resolv.conf
单项选择题 DuringrebootthesystemhangswithLED0581thatindicates"ConfiguringTCP/IP."Whichrecoveryproceduresshouldbetaken？（）
单项选择题 DuringrebootthesystemhangswithanLED0554messagethatmeans，"Thebootdevicecouldnotbeopenedorareadfailed."Whatrecoveryproceduresshouldbetaken？（）
单项选择题 Asystemwasrunningproperlyuntilareboot.Followingthereboot，thesystemLEDdisplayedcyclesbetween0223and0229.Whichofthefollowingproceduresshouldbeperformednext？（）