单项选择题
A host is to become part of a hierarchical naming topology. Which of the following services are required？（）
A.DHCP B.Domain Name Service C.Network Information Service D.A hosts file
单项选择题 ToaddaTTYTerminaltoSerialport1，whichofthefollowingsetofoptionsshouldbechosen？（）
单项选择题 Whichcommandcanbeusedtomodifynetworkoptions？（）
单项选择题 AllofthefollowingsettingswillresultinagettyprocessontheconfiguredportEXCEPT：（）
