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Nokia 4A0-113 Exam - Topic 9 Question 107 Discussion

An OSPF adjacency is stuck in the exstart state. What is the most likely cause?
A) The MTU does not match on both interfaces.
B) OSPF is not enabled on one of the routers.
D) An OSPF Hello has not been received from the neighbor.
C) The router ID is the same on both routers.
E) The interfaces are configured as point-to-point on one side and broadcast on the other.

Nokia 4A0-113 Exam - Topic 9 Question 107 Discussion

Actual exam question for Nokia's 4A0-113 exam
Question #: 107
Topic #: 9
[All 4A0-113 Questions]

An OSPF adjacency is stuck in the exstart state. What is the most likely cause?

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Suggested Answer: A

by Letha at Jan 23, 2026, 11:42 PM

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Tiffiny
9 days ago
True, but MTU is the most common cause. Always check that first!
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Val
14 days ago
Could also be a problem with the hello or dead intervals, right?
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Bok
19 days ago
Yeah, that makes sense. If they don't match, it can cause issues.
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Ronny
24 days ago
I think it's due to mismatched MTU sizes.
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Jules
2 months ago
Nah, it's definitely about the DR/BDR election process.
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Chau
2 months ago
Surprised to hear it's often just MTU, thought it was more complex!
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Mitsue
3 months ago
I thought it could also be a problem with the OSPF timers?
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Angelica
3 months ago
Totally agree, MTU issues are common here.
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Esteban
3 months ago
Usually due to mismatched MTU sizes.
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Claudia
3 months ago
Ooh, exstart state, that's a tricky one. Bet the network gods are playing a little prank on us.
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Dick
3 months ago
I bet it's a pesky OSPF timer issue. Time to break out the debugs and get to the bottom of this.
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Arthur
4 months ago
Hmm, exstart state, eh? Sounds like someone's been hitting the coffee a little too hard.
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Elden
4 months ago
Probably a misconfigured MTU or a faulty network cable. Time to get the network admin on the case!
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Garry
4 months ago
The router must be having a bad day, stuck in the exstart state like that.
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Isabelle
4 months ago
I practiced a similar question, and I think it might have to do with the OSPF timers being misconfigured.
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Joana
4 months ago
I'm not entirely sure, but I feel like it could also be related to the router IDs not matching.
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Alonzo
5 months ago
I think I saw a practice question about OSPF states, and it mentioned issues with the database description packets.
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Hershel
5 months ago
I remember something about mismatched MTU sizes causing issues in OSPF. Could that be it?
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Leanna
5 months ago
Ah yes, the exstart state - that's where the routers negotiate the initial exchange of database info. Hmm, could be a number of things causing it to get stuck there.
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Justine
5 months ago
I'm a bit unsure about this one. The exstart state... I know that's an early stage in the OSPF adjacency process. Gotta dig into the details on that.
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Ben
6 months ago
Okay, let's see. The exstart state is where the routers exchange their database descriptions, right? Probably need to check the network config.
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Agustin
6 months ago
Ah, the exstart state - I remember learning about that. Gotta figure out what's causing the issue there.
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Olene
6 months ago
Hmm, this seems like a tricky one. I'll need to think through the OSPF adjacency states carefully.
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Malcolm
3 days ago
Maybe there's a mismatch in the MTU settings?
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