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Exam 300-430 topic 1 question 28 discussion

Actual exam question from Cisco's 300-430
Question #: 28
Topic #: 1
[All 300-430 Questions]

What is the Cisco recommended configuration for a Cisco switch port connected to an AP in local mode for optimal voice over WLAN performance with an 8821 wireless phone?

  • A. switchport encapsulation dot1q switchport mode trunk mls qos trust device cisco-phone
  • B. switchport mode access mls qos trust device cisco-phone
  • C. switchport mode access mls qos trust cos
  • D. switchport mode access mls qos trust dscp
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Suggested Answer: D 🗳️

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daeman
Highly Voted 2 years, 7 months ago
The question asks that the switch configuration should be for the AP not the WLC so...from the link provided: Enable DSCP trust for Cisco Access Points mls qos ! interface X mls qos trust dscp
upvoted 8 times
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rrahim
Most Recent 2 months, 1 week ago
Selected Answer: C
C. switchport mode access mls qos trust cos This configuration ensures that the switch port operates in access mode and trusts the Class of Service (CoS) values from the AP, which is critical for maintaining proper QoS for voice traffic. D. switchport mode access mls qos trust dscp: While DSCP trust is important, CoS trust is specifically recommended for VoWLAN with Cisco 8821 phones.
upvoted 1 times
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ForneyJR
7 months, 3 weeks ago
Selected Answer: D
From the link provided, D is correct. On p. 40 Enable DSCP trust for Cisco Access Points mls qos interface X mls qos trust dscp
upvoted 1 times
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Vlad_Is_Love_ua
1 year, 9 months ago
Selected Answer: D
Enable DSCP trust for Cisco Access Points mls qos ! interface X mls qos trust dscp
upvoted 1 times
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GoldLeader
1 year, 9 months ago
Selected Answer: D
Answer D.
upvoted 1 times
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SamGill
2 years, 1 month ago
Selected Answer: D
For AP QoS on Switchport: DSCP is used For Controller QoS on Switchport: CoS is used. Because this asks for AP, the right answer is D
upvoted 3 times
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itapase0314
2 years, 3 months ago
Selected Answer: D
Cisco Cert guide says " DSCP is the preferred mothod of QoS trust"
upvoted 1 times
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Axel315
2 years, 4 months ago
Selected Answer: D
Enable DSCP trust for Cisco Access Points
upvoted 1 times
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cvndani
2 years, 7 months ago
Selected Answer: D
Answer D
upvoted 2 times
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cvndani
2 years, 7 months ago
Selected Answer: D
Answer D Enable COS trust for Cisco Wireless LAN Controller mls qos ! interface X mls qos trust cos
upvoted 2 times
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junjunpatotoy
2 years, 7 months ago
Answer D
upvoted 3 times
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Community vote distribution
A (35%)
C (25%)
B (20%)
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