单项选择题
A.发送到ff02::1的ICMPv6错误消息 B.发送到ff02::1的邻居发现消息 C.发送到ff02::2的ICMPv6错误消息 D.发送到ff02::2的邻居发现消息
A.Neighbor Unreachability Detection B.Duplicate Address Detection C.Neighbour Discovery D.没有