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CompTIA N10-009 Exam - Topic 1 Question 35 Discussion

Actual exam question for CompTIA's N10-009 exam
Question #: 35
Topic #: 1
[All N10-009 Questions]

Due to concerns around single points of failure, a company decided to add an additional WAN to the network. The company added a second MPLS vendor to the current MPLS WAN and deployed an additional WAN router at each site. Both MPLS providers use OSPF on the WAN network, and EIGRP is run internally. The first site to go live with the new WAN is successful, but when the second site is activated, significant network issues occur. Which of the following is the most likely cause for the WAN instability?

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Suggested Answer: B

Asymmetrical routing occurs when packets take different paths to and from the destination, leading to instability in network communication. The use of two different MPLS providers with OSPF can lead to this type of routing issue, especially if the paths aren't carefully configured and managed. This can cause unexpected routing behaviors and instability in a dual-WAN setup. (Reference: CompTIA Network+ Study Guide, Chapter on Network Routing)


by Honey at Apr 01, 2026, 12:48 AM

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Tesha
18 days ago
I disagree, a switching loop seems more likely here.
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Jess
23 days ago
Sounds like asymmetrical routing could be the culprit.
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Reita
1 month ago
I’m not entirely confident, but I feel like the CDP neighbor change might not be the main issue. Asymmetrical routing sounds more likely based on what I practiced.
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Ria
2 months ago
I'm leaning towards an incorrect IP address being the problem. It seems like a common mistake when adding new routers, right?
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Tula
2 months ago
I think I saw a practice question about switching loops causing instability. Could that be a possibility in this scenario?
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Lovetta
2 months ago
I remember studying OSPF and EIGRP interactions, but I'm not sure how they handle multiple WANs. Could asymmetrical routing be the issue here?
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