A.if a switch that is configured to operate in client mode cannot access a VTP server，then the switch reverts to transparent mode.
B.The local vlan configuration is updated only when an update that has a higher configuration revision number is received.
C.Vtp advertisements are not forwarded to neighboring switches that are configured in vtp transparent mode.
D.When switches in vtp client mode are rebooted，they send a vtp advertisement request to the vtp servers.
E.Vtp client is the default vtp mode
F.On switches that are configured to operate in client mode ，vlans can be created，deleted，or renamed locally

A.IKE
B.安全套階層
C.SSH
D.PGP

A.10
B.40
C.30
D.20

A.remote DLCI on the main interface
B.local DLCI on the main interface
C.local DLCI on the subinterface
D.remote DLCI on the subinterface

A.加密—加密—解密
B.加密—解密—加密
C.解密—加密—解密
D.加密—加密—加密