进行接触网停电作业时须注意哪些事项？

A. VTP messages are sent out all switch-switch connections.
B. VTP L2 messages are communicated to neighbors using CD
C. VTP manages addition， deletion， and renaming of VLANs 1 to 4094.
D. VTP pruning restricts flooded traffic， increasing available bandwidth.
E. VTP V2 can only be used in a domain consisting of V2 capable switches.
F. VTP V2 performs consistency checks on all sources of VLAN information.

A. 打开
B. 关闭
C. 盲死
D. 不要求