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Exam 4A0-101 topic 3 question 51 discussion

Actual exam question from Alcatel-Lucent's 4A0-101
Question #: 51
Topic #: 3
[All 4A0-101 Questions]

Two IS-IS L1/L2 routers are in the same area on the same Ethernet segment. One of the routers is the DIS. How many adjacencies will be formed between them?

  • A. None
  • B. 1
  • C. 2
  • D. 3
  • E. 4
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Suggested Answer: C 🗳️

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DracoD
3 years, 3 months ago
The designated router reduces the number of adjacencies required because each router forms an adjacency only with the DIS router. That gives 2 adjacencies. One for L1 and another one for L2.
upvoted 2 times
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Med_Mahboubi
3 years, 4 months ago
We have DIS so interface type is broadcast. I broadcast interface we have to separate LSP: L1 and L2
upvoted 1 times
Med_Mahboubi
3 years, 4 months ago
Adjacency not LSP
upvoted 1 times
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snowblack
3 years, 5 months ago
I think it would be 1.
upvoted 1 times
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C (25%)
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