单项选择题
A./etc/hosts
B./etc/irs.conf
C./etc/netsvc.conf
D./etc/resolv.conf
单项选择题 Amachinemusthavethemostdirectaccesspossibletotwodifferentnetworks.However，itcannotactasarouterbetweenthenetworks.Whichofthefollowingarrangementsismostappropriatetofacilitatethemachine’saccessibility？（）
单项选择题 Inordertoincreasereliability，minimizecollisionsandestablishalargenumberofsystemsonanEthernetsegment，whichofthefollowingoptionsshouldbeselectedfortheEthernetnetwork？（）
单项选择题 Whichofthefollowingclassnetworkscontains65，534hosts？（）