单项选择题
A. Class A
B. Class B
C. Class C
D. Class D
单项选择题 WhichofthefollowingcommandswillNOTdeterminetheslotlocationofanEthernetadapterinasystem？（）
单项选择题 Whichofthefollowingfilesshouldcontainthestatement"hosts=local，bind"？（）
单项选择题 Amachinemusthavethemostdirectaccesspossibletotwodifferentnetworks.However，itcannotactasarouterbetweenthenetworks.Whichofthefollowingarrangementsismostappropriatetofacilitatethemachine’saccessibility？（）