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Exam JN0-648 topic 1 question 46 discussion

Actual exam question from Juniper's JN0-648
Question #: 46
Topic #: 1
[All JN0-648 Questions]

Click the Exhibit button.

A router is attempting to form an OSPF neighborship with another router. However, the OSPF neighborship fails to establish completely.
Referring to the exhibit, what is the problem?

  • A. There is an interface type mismatch.
  • B. There is an OSPF area mismatch.
  • C. There is an interface subnet mask mismatch.
  • D. There is an interface MTU mismatch.
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Suggested Answer: D 🗳️
by fyoumb at Sept. 11, 2020, 12:39 p.m.

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fyoumb
Highly Voted 4 years, 7 months ago
Shouldn’t the answer be “A”? There’s nothing in the logs referencing a MTU mismatch… root@SRX> show log debug-ospf | match mtu Jan 26 06:09:19.642884 OSPF packet ignored: MTU mismatch from 192.169.1.2 on intf ge-0/0/0.0 area 0.0.0.0
upvoted 5 times
Pratik_007
4 years, 7 months ago
It won't go into 2-way state if there is an interface mismatch
upvoted 4 times
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dragossky
Most Recent 2 years, 4 months ago
Selected Answer: D
2-way.
upvoted 1 times
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hyena
3 years, 7 months ago
If it stuck on Exstart state .. then is mtu.. we can see in the msg that it is already based the 2way state...
upvoted 1 times
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tiendung97
3 years, 8 months ago
the answer be “A”
upvoted 1 times
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Gdjskiejdn
4 years, 5 months ago
A. There is an interface type mismatch. That matches the logs
upvoted 2 times
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DBBAITS
4 years, 6 months ago
Restart Signaling says Interface Mismatch
upvoted 2 times
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C (25%)
B (20%)
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