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Cisco 300-820 Exam - Topic 15 Question 109 Discussion

An employee has recently left an organization and a manager suspects that this employee may have made changes to the system that no one is aware of. Mobile and Remote Access registration is not working. Internal communications appear to be working, but no external system is able to register or call anywhere. While investigating this problem, it is discovered that no internal systems are able to call externally either. What is the TraversalZone missing that is causing this issue?
C) link to the DefaultZone
A) SIP trunk to the DefaultZone
B) route pattern to the DefaultZone
D) pipe to the DefaultZone

Cisco 300-820 Exam - Topic 15 Question 109 Discussion

Actual exam question for Cisco's 300-820 exam
Question #: 109
Topic #: 15
[All 300-820 Questions]

An employee has recently left an organization and a manager suspects that this employee may have made changes to the system that no one is aware of. Mobile and Remote Access registration is not working. Internal communications appear to be working, but no external system is able to register or call anywhere. While investigating this problem, it is discovered that no internal systems are able to call externally either. What is the TraversalZone missing that is causing this issue?

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Suggested Answer: C

by Kristel at Apr 06, 2026, 12:22 AM

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Kenia
1 month ago
I lean towards C) link to the DefaultZone. Without a link, nothing can connect.
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Nohemi
2 months ago
I feel like it's B) route pattern to the DefaultZone. It makes sense for external calls.
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Dominic
2 months ago
This is tricky. I think it's A) SIP trunk to the DefaultZone.
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Belen
2 months ago
I agree, SIP trunk seems most likely!
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Nakisha
2 months ago
I think it's the pipe to the DefaultZone, not sure though.
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Scarlet
2 months ago
Wait, could it really be a link problem?
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Krissy
4 months ago
Definitely a route pattern issue, I bet.
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Georgene
4 months ago
Sounds like a missing SIP trunk to the DefaultZone.
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Luz
5 months ago
I definitely think it's something to do with the connection to the DefaultZone, but I’m torn between a link or a trunk.
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Brandee
5 months ago
I feel like the missing link could be related to the DefaultZone, but I can't remember if it's a trunk or a pipe.
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Elly
5 months ago
This seems similar to a practice question we did on connectivity issues. I think a route pattern might be involved, but I can't recall the specifics.
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Kimi
5 months ago
I remember something about SIP trunks being essential for external calls, but I'm not entirely sure if that's the right answer here.
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