单项选择题 Whichofthefollowingcommandsindicateswhenaninterfacehasamulticastcapability？（）
单项选择题 WhenanICMPredirectisreceivedfromahostthatisnotthecurrentgatewayfortherouteitisredirecting，whichofthefollowingoptionsisthemostappropriatetoconclude？（）
单项选择题 WhenconfiguringaninterfaceusingSMITandFurtherConfigurationwithanIPaddressandnetmask，whichofthefollowingoutcomesindicateshowtheroutingtableswillbeaffected？（）