97免费在线观看视频,亚洲综合自拍网,黄色毛片免费观看,热久久综合网,免费看日产一区二区三区 狠狠操av,久久久涩涩涩,在线精品免费视频,人人插天天干,久久91精品国产91久久

單項選擇題

Refer to the exhibit. Look at the command output. What can you use to prevent this behavior? ()

A. UDLD  (UniDirectional Link Detection)
B. spanning-tree loopguard
C. VTP mode transparent
D. switchport mode desirable

微信掃碼免費搜題