单项选择题
A.DNS
B.FTP
C.WINS
D.IMAP4
多项选择题 WhichofthefollowingarevalidpublicIPv4addresses？（）
单项选择题 Auserhasasmallnetworkoffourcomputersthattheywanttoconnecttoasinglecablemodem.Whichofthefollowingdeviceswouldallowtheusertodothis？（）
单项选择题 Auserstatesthattheycannotaccessanetworkshareddrive.Thetechnicianhasverifiedthattheclientsnetworkcableisgood.TheIPaddressofthemachineis169.254.10.15.Whichofthefollowingisthecauseoftheproblem？（）