试题详情
- 单项选择题 Click the Exhibit button. Given the information shown in the exhibit, when creating 2 DS1 circuits, how many STS ports are used on the VT1.5 matrix at Node 1 as VT circuits and how many are used after using VT tunnels?（）
A、2；0
B、3；2
C、3；5
D、4；0
E、6；0
F、6；2
- C
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