问题：

[多选] What are two characteristics of a switch that is configured as a VTP client？（）

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