单项选择题
A remote host can be pinged from all switches except one. Which of the following is the most likely reason for this failure？（）
A.VTP pruning has isolated the switch. B.IP routing is disabled on the switch. C.PoE is failing on the remote port. D.There is a loop in the topology.
单项选择题 Whatistheresultofenteringthecommandspanning-treeloopguarddefault？（）
单项选择题 Whatistheresultofenteringthecommandport-channelload-balancesrc-dst-iponanEtherChannellink？（）
多项选择题 WhichthreeofthefollowingareorganizationalobjectivesthatshouldbeaddressedwhendevelopinganewVLANimplementationplan？（）
