单项选择题
A. VT circuits B. STS circuits C. VT tunnel circuits D. 1:1 protection circuits E. 1:N protection circuits
Click the Exhibit button. Given the information shown i...
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
A customer wants to create a 1:1 protection group with ...
单项选择题A customer wants to create a 1:1 protection group with a DS3N-12 card. Which card slots would allow for a 1:1 protection?（）
A. Slot 2 and Slot 4 B. Slot 4 and Slot 6 C. Slots 5 or 13 only D. Slot 16 and Slot 17
Click the Exhibit button. Which type of protection is s...
Click the Exhibit button. Which type of protection is shown in the exhibit?（）
A.1+0 B.1+1 C.1：1 D.1：N
