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300-365 · Question #170
300-365 Question #170: Real Exam Question with Answer & Explanation
The correct answer is A: The normal TSPEC request is rejected and the expedited bandwidth request is admitted. With load-based CAC in the 75-85% bandwidth range and reserved voice bandwidth exhausted, normal TSPEC requests are rejected while expedited bandwidth requests are still admitted.
Wireless Troubleshooting and Optimization
Question
Your network has these characteristics: - CAC mode is set to load-based CAC - The bandwidth usage is between 75 and 85 percent - The reserved bandwidth for voice calls is exhausted Which action occurs to TSPEC requests in this environment?
Options
- AThe normal TSPEC request is rejected and the expedited bandwidth request is admitted
- BThe normal TSPEC request is admitted and the expedited bandwidth request is rejected
- CThe normal TSPEC request is rejected and the expedited bandwidth request is rejected
- DThe normal TSPEC request is admitted and the expedited bandwidth request is admitted
Explanation
With load-based CAC in the 75-85% bandwidth range and reserved voice bandwidth exhausted, normal TSPEC requests are rejected while expedited bandwidth requests are still admitted.
Common mistakes.
- B. This reverses the correct behavior - normal TSPEC is rejected (not admitted) when reserved bandwidth is exhausted, and expedited requests retain admission priority.
- C. Rejecting expedited requests only occurs above the 85% maximum utilization threshold; between 75-85%, expedited requests are still serviceable.
- D. Both cannot be admitted simultaneously when the reserved bandwidth pool is exhausted - at minimum, normal TSPEC requests must be rejected in this state.
Concept tested. Load-based CAC TSPEC admission control thresholds
Reference. https://www.cisco.com/c/en/us/td/docs/wireless/controller/8-10/config-guide/b_cg810/qos.html
Topics
#load-based CAC#TSPEC#bandwidth reservation#QoS admission control
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