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Exam 300-430 topic 1 question 261 discussion

Actual exam question from Cisco's 300-430
Question #: 261
Topic #: 1
[All 300-430 Questions]

An engineer configures QoS on an AireOS WLC v8.5. The engineer configures a WLAN for voice traffic and must set the data rates within the QoS profile. How should the data rates be configured to ensure that the QoS profile allows traffic to and from the wireless client?

  • A. The burst data rate should be configured before the average data rate.
  • B. The burst data rate should be greater than or equal to the average data rate.
  • C. Data rates should be applied per AP radio.
  • D. The burst data rate should be set to a non-zero value.
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Suggested Answer: D 🗳️
by Le91 at Oct. 30, 2024, 5:53 p.m.

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rrahim
1 week, 1 day ago
Selected Answer: B
The correct answer is: B. The burst data rate should be greater than or equal to the average data rate. Explanation: When configuring QoS on an AireOS WLC for a WLAN dedicated to voice traffic, the burst data rate and average data rate must be set appropriately to ensure that the QoS profile allows traffic to and from the wireless client. Here's why: Burst Data Rate: This is the maximum rate at which traffic can be sent in short bursts. It should be set to a value that accommodates the peak demand of voice traffic. Average Data Rate: This is the sustained rate at which traffic can be sent over time. It should be set to a value that reflects the typical bandwidth requirements of voice traffic. Relationship Between Burst and Average Data Rates: For QoS to function effectively, the burst data rate must be greater than or equal to the average data rate. This ensures that the WLC can handle temporary spikes in traffic (e.g., during voice calls) without dropping packets or causing delays.
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rrahim
1 week, 1 day ago
Why the Other Options Are Incorrect: Option A: The burst data rate should be configured before the average data rate. The order in which the rates are configured does not affect functionality. What matters is the relationship between the values. Option C: Data rates should be applied per AP radio. Data rates in the QoS profile are applied to the WLAN, not per AP radio. This option is irrelevant to the configuration of the QoS profile. Option D: The burst data rate should be set to a non-zero value. While the burst data rate should typically be non-zero, this alone does not ensure proper QoS functionality. The relationship between the burst and average data rates is more critical.
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Le91
3 months, 3 weeks ago
Selected Answer: B
The burst data rate should be greater than or equal to the average data rate. Otherwise, the QoS policy may block traffic in the WLANs.
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