单项选择题 Userscomplaintheycannotcommunicatewithaserver.ThesystemadministratorsuspectstheremaybeaproblemwiththeEthernetadapterorwiththewayitisconfigured.Whichcommandcanberuntoverifytheadapterisconfiguredcorrectly？（）
单项选择题 WhatisthecorrectfastpathtoconfigureoraddaTTYTerminal（directlyfromthescreen），whichconnectstoaserialport？（）
单项选择题 ForSLIPtowork，whatshouldthe"EnableLogin"valuebesettoonbothsystems？（）