350-801 Question #382: Real Exam Question with Answer & Explanation

Question

When designing location-based CAC, how much overprovisioning is calculated for video bandwidth?

Options

• A10%
• B15%
• C20%
• D25%

Explanation

When designing location-based Call Admission Control in Cisco UCM, it is recommended to calculate 20% overprovisioning for video bandwidth to ensure robust performance and account for variability.

Approach. Cisco's design recommendations for location-based Call Admission Control (CAC) suggest overprovisioning video bandwidth by 20%. This additional bandwidth accounts for factors such as variations in video compression, network overhead, and potential bursts in video traffic, ensuring a better user experience.

Common mistakes.

• A. 10% overprovisioning is generally insufficient for video traffic due to its inherent variability and sensitivity to bandwidth fluctuations.
• B. 15% overprovisioning is below the recommended 20% for video bandwidth in CAC designs, which could lead to quality issues during peak video usage.
• D. While more is generally better, 25% overprovisioning is not the standard design recommendation for video bandwidth in Cisco's location-based CAC and might be an unnecessary allocation of resources.

Concept tested. Location-based CAC video overprovisioning

Reference. https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/srnd/collab12/collab12/cac.html

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