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

多項選擇題

For SONET ring switching, the 50ms switch time: Select all that apply?()

A.Plncludes the detection time
B.Applies to rings smaller than 1200km
C.Applies to rings smaller than 1000km
D.Includes up to 16 nodes

微信掃碼免費搜題