单项选择题
A.IEEE 802.1Q
B.IEEE 802.10
C.Misconfigured NIC
D.User configuration
E.All of the above
多项选择题 Inthenetwork，VLANTrunkingProtocol（VTP）isrunningwithadomainnameofR1.VLANs1，2，3，4，5，10，20areactiveonthenetwork.Suddenlythewholenetworkgoesdown.NotrafficisbeingpassedonVLANs2，3，4，5，10，20.However，trafficpassesonVLAN1andindicatesallswitchesareoperational.Rightbeforethenetworkproblemoccurred；aswitchnamedSW13wastakenoutofthelabandaddedtothenetwork.WhatthreeconfigurationissuesonSW13couldbecausingthenetworkoutage？（）
多项选择题 On the basis of the following exhibit， can you tell me why VLAN updates from switch CK-P2S1 arenot applied to switch CK-P1S1？（）
多项选择题 ACompanyisusing6to4tunnelsintheirIPv6network.Whichtwostatementsaretrueaboutthesetunnels？（）