Free Cisco 300-430 Actual Exam Questions - Question 14 Discussion
Question No. 14
An engineer wants the wireless voice traffic class of service to be used to determine the queue order
for packets received, and then have the differentiated services code point set to match when it is
resent to another port on the switch. Which configuration is required in the network?
for packets received, and then have the differentiated services code point set to match when it is
resent to another port on the switch. Which configuration is required in the network?
Select one option, then reveal solution.
US
AT
Amir T.
2026-02-11
Isn’t the wireless voice traffic already tagged with CoS before hitting the switch port?
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PZ
Paul Z.
2026-01-27
D. The voice traffic class from wireless usually gets tagged with CoS first, so trusting CoS on the controller switch port ensures the correct queue order based on that. Then it can map to the proper DSCP when sending to other ports. Trusting DSCP (C) might not work well since the initial classification starts with CoS in wireless. So, D fits better with the way wireless voice traffic is handled end to end.
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PZ
Paul Z.
2026-01-23
D imo, trusting CoS fits since wireless voice class maps to CoS before DSCP.
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AE
Adeel E.
2026-01-16
D. msl qos trust cos configured on the controller switch port makes sense here. But why not DSCP trust for matching code points?
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