问题:
Given the network diagram, which routers currently make up the IS - IS backbone?()
A . R3,R4,R6
B . R2,R3,R6,R7
C . R1 through R8
D . R3,R4,R5,R6
E . R2,R3,R4,R6,R7
Given the network diagram, which routers currently make up the IS - IS backbone?()
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