Free Cisco CLCEI 300-820 Actual Exam Questions - Question 4 Discussion
anymore for an organization. There are several administrators and configuration changes could have
happened without anyone knowing. Internal communication seems to be working, but no external
system can register or call anywhere. Gathering symptoms, you also discover that no internal
systems can call out either.
What is TraversalZone missing that causes this issue?
Option B makes sense too, since pipes actually carry the media. Without that, even if signaling works, calls won’t complete properly between zones.
I thought about option A too, since a link connects zones logically. But if internal calls can’t go out, maybe the issue is more about how media flows rather than just the link. Could the problem be more with B or C?
C/D? If internal calls aren’t going out and external can’t register, it sounds like signaling is blocked, which points to missing a SIP trunk (C). A route pattern (D) seems less likely since calls fail even internally.
It’s B. Without a pipe between TraversalZone and DefaultZone, media streams can’t flow, which blocks calls even if signaling is set. Pipes handle the RTP media path, so missing that would stop calls despite other configs. The link (A) just establishes communication lines but isn’t enough alone, and the SIP trunk (C) handles signaling but won’t fix media issues without the pipe. Route patterns (D) are more about dialing plans, so less likely the root cause here.
C - no SIP trunk means no signaling between zones, causing call failure.
A imo, because without a link to the DefaultZone, the zones can’t communicate properly at all. Pipes and trunks rely on that basic connection to function.
Option C makes sense since without a SIP trunk, signaling between zones won’t happen, which explains why neither internal nor external calls are going through. Pipes or links alone don’t handle the call signaling needed.
C Without a SIP trunk to the DefaultZone, calls can't be routed properly between zones, which fits the symptom of no external or outgoing calls working. Pipes or links alone won't handle signaling for calls.
B tbh, a missing pipe to the DefaultZone would block calls going through from inside to outside systems.