A user in location X dials an extension at location Y. The call travels through a QoS-enabled WAN network, but the user experiences choppy or clipped audio. What is the cause of this issue?
Question states that the WAN is QoS enabled.
Answers B and C will not have audio. Answer A still doesn't fix the real root cause. Answer is D, because CoS setting will properly tag audio traffic so that it is prioritized over the WAN.
The question asks about the cause of choppy or clipped audio when a user in location X calls an extension at location Y over a QoS-enabled WAN network.
The most likely cause of this issue is: B. codec mismatch
Thus, B. codec mismatch is the most plausible cause of choppy or clipped audio in this scenario.
Maybe D ? if the phone is not set for trust then there is no QoS markings on the phone which in turn never get prioritized across the WAN. even though QoS is enabled on the WAN
Best Answer would have been if there was something related to QoS misconfigured or missing but Call Admission Control is the closest it gets to QoS. So i agree with you its (A)
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