A.是否邊緣 B.是否全雙工 C.是否根端口 D.是否被阻塞
A.spanning-tree rstp B.spanning-tree type rstp C.spanning-tree mode rstp D.spanning-tree protocol rstp
A.01-80-C2-00-00-00 B.01-08-2C-00-00-00 C.01-80-2C-00-00-00 D.01-08-C2-00-00-00