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Exam JN0-681 topic 1 question 23 discussion

Actual exam question from Juniper's JN0-681
Question #: 23
Topic #: 1
[All JN0-681 Questions]

Referring to the exhibit, Host 1 and Host 3 have exchanged traffic.

`
In this scenario, which statement is true?

  • A. Leaf 2 does not learn Host 1's MAC address until Host 1 and Host 2 send traffic to each other.
  • B. Leaf 2 learns Host 1's MAC address through periodic updates from Spine 2.
  • C. Leaf 2 learns Host 1's MAC address when Host 3 learns Host 1's MAC address.
  • D. Leaf 2 learns Host 1's MAC address when Leaf 1 queries Host 1.
Show Suggested Answer Hide Answer
Suggested Answer: C 🗳️
by Ochman at Sept. 4, 2020, 8:22 p.m.

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changpangavin
2 years, 6 months ago
Selected Answer: C
I think is C, A has some issue. if the spine learned MAC by signaling, all the nodes should learn too, no matter what about host1 to host2 have traffic or not
upvoted 3 times
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febilou
2 years, 8 months ago
Selected Answer: A
agreed with A
upvoted 1 times
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Ant_OnioN
2 years, 8 months ago
Selected Answer: C
"Within EVPN, MAC addresses are learned and propagated in the control-plane. When a local VTP learns these MAC addresses, they are advertised in MP-BGP updates to other leaf devices participating in the same VPN instance"
upvoted 1 times
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piipo
2 years, 9 months ago
Selected Answer: A
A is correct
upvoted 1 times
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johnmcclane78
3 years, 2 months ago
Selected Answer: C
I guess, C is the right answer. I have never seen some type of "query" statement in documentation. Local MAC's are learned by any sort of L2 traffic between VTEP and host. Then Local MAC is advertised by Type-2 Routes to another VTEP's in VNI
upvoted 1 times
johnmcclane78
3 years, 2 months ago
Made a mistake:) A must be the right answer
upvoted 1 times
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rockncool
4 years, 3 months ago
D obviously correct
upvoted 2 times
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Ochman
4 years, 7 months ago
I thought answer will be B
upvoted 2 times
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