A.Etherchannelandtrunking
B.NetworkInterfaceBackupandEtherchannel
C.SharedEthernetAdapter（SEA）FailoverandEtherchannel
D.NetworkInterfaceBackupandSharedEthernetAdapterfailover
参考答案：D
AEtherchannelandtrunkingBNetworkInterfaceBackupandEthercha
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