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The IS-IS Leve1-1 neighbor between R3 and R4 is not established. What is the possible reason based on the information in this figure?
- A . The circuit-type of the interconnection interface of R3 and R4 does not match
B. The area numbers of R3 and R4 are different
C. IS-Leve1 of R3 and R4 do not match
D. The IIH authentication of R3 and R1 failed
Suggested Answer: B
Posted : 05/12/2022 7:03 am