单项选择题
A.A variance was configured for EIGRP autonomous system 109.
B.The EIGRP topology table displays all routes to a destination.
C.The EIGRP topology table shows only backup routes to a destination.
D.Multiple floating static routes were configured to network 192.168.81.0 via interface Serial0.
多项选择题 What are the possible trunking modes for a switch port? （）
多项选择题 What should be done prior to backing up an IOS image to a TFTP server? （）
多项选择题 WorkstationAhasbeen assignedanIPaddressof192.0.2.24/28.WorkstationBhasbeenassignedanIPaddressof192.0.2.100/28.Thetwoworkstationsareconnectedwithastraight-throughcable.Attemptstopingbetweenthehostsareunsuccessful.Whattwothingscanbedonetoallowcommunicationsbetweenthehosts？（）