200-301 Question #1173: Real Exam Question with Answer & Explanation

Question

SIP-based Call Admission Control must be configured in the Cisco WLC GUI. SIP call-snooping ports are configured. Which two actions must be completed next? (Choose two.)

Options

• ASet the QoS level to silver or greater for voice traffic.
• BConfigure two different QoS roles for data and voice traffic.
• CEnable Media Session Snooping on the WLAN.
• DSet the QoS level to platinum for voice traffic.
• EEnable traffic shaping for the LAN interface of the WLC.

Explanation

To complete SIP-based Call Admission Control (CAC) configuration on a Cisco WLC after setting SIP snooping ports, Media Session Snooping must be enabled on the WLAN, and the QoS level for voice traffic must be set to Platinum.

Common mistakes.

• A. While QoS is essential, 'silver or greater' is too vague; for real-time voice traffic, the highest priority QoS level, Platinum, is specifically recommended to meet strict latency and jitter requirements.
• B. While configuring different QoS roles for data and voice traffic is a general QoS best practice, it's not the next specific action directly tied to enabling SIP-based CAC for voice on the WLAN as per Cisco WLC configuration.
• E. Traffic shaping might be applied for bandwidth management in certain network scenarios, but it is not a direct or required step immediately following SIP call-snooping port configuration for enabling SIP-based Call Admission Control on the WLC.

Concept tested. Cisco WLC SIP-based Call Admission Control (CAC) configuration

Reference. https://www.cisco.com/c/en/us/td/docs/wireless/controller/8-0/configuration/guide/b_cg80/b_cg80_chapter_010000.html#concept_AC4E8D4F0A4A4858B35A86E931980373

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