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

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单项选择题

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

单项选择题

You are provisioning a DS-1 circuit on an ONS 15454 UPSR configuration and XC-10G card. How many total VT ports are used within the VT matrix at the source node?（）

A.0
B.1
C.2
D.3
E.4

单项选择题

What is the correct relative switching priority in a BLSR ring (higher to lower)?（）

A. signal fail, signal degrade, manual switch
B. signal degrade, signal fail, manual switch
C. protection lockout, manual switch, path AIS
D. forced switch, manual switch, signal degrade
E. protection lockout, manual switch, forced switch