单项选择题
Which of the following interfaces is appropriate for an Ethernet adapter that is configured with an IEEE 802.3 frame type？（）
A.at0 B.en0 C.et0 D.tr0
单项选择题 Whichofthefollowingclassaddressesisreservedformulticast？（）
单项选择题 WhichofthefollowingcommandswillNOTdeterminetheslotlocationofanEthernetadapterinasystem？（）
单项选择题 Whichofthefollowingfilesshouldcontainthestatement"hosts=local，bind"？（）
