生成树端口的哪种状态接收 BPDU,学习 MAC 地址,不转发数据帧?
A.
A:A.Blocking;B:B.Listening;C:C.Learning;D:D.Forwarding;
B.
A:A.Blocking;B:B.Listening;C:C.Learning;D:D.Forwarding;
C.
A:A.Blocking;B:B.Listening;C:C.Learning;D:D.Forwarding;
D.
A:A.Blocking;B:B.Listening;C:C.Learning;D:D.Forwarding;