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350-801Updated 1d ago · Sep 4, 2026

350-801 CLCOR: Implementing and Operating Cisco Collaboration Core Technologies

514 questions across 1 topics, with suggested answers, explanations where available, and imported community discussion. The first 51 questions are free to preview.

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Question 1 · Infrastructure and Design Open

Cisco UCM uses location-based call admission control to control the bandwidth permitted between predefined locations. What must be taken into account when calculating how many calls can be placed?

Answer: B Cisco UCM location-based CAC tracks the bandwidth consumed by active calls according to the selected codec. For audio calls, its bandwidth calculation includes the media bit rate plus IP/UDP header overhead, so the configured location bandwidth is allocated against the aggregate calculated call bandwidth rather than signaling traffic or RTP payload alone. **Learn more:** [Cisco Preferred Architecture: Bandwidth Management](https://www.cisco.com/c/en/us/td/docs/solutions/CVD/Collaboration/enterprise/12x/120/collbcvd/bwmgmt.html) · [Cisco Unified CM 12.5 System Configuration Guide: Enhanced Locations CAC](https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/admin/12_5_1SU3/systemConfig/cucm_b_system-configuration-guide-1251su3/cucm_m_enhanced-locations-cac.html)
Question 2 · Media and QoS Open

Which statement describes the DiffServ model used to implement QoS?

Answer: D DiffServ assigns voice and video to different service classes so they receive appropriate forwarding treatment. Voice is typically marked EF and carried in a low-latency priority queue, while video is commonly marked AF41 and placed in a separate bandwidth-guaranteed queue. Within an AF class, AF41, AF42, and AF43 represent low, medium, and high drop precedence, respectively. **Learn more:** [Cisco: Implement QoS Policies with Differentiated Services Code Point](https://www.cisco.com/c/en/us/support/docs/quality-of-service-qos/qos-packet-marking/10103-dscpvalues.html) · [Cisco Embedded Wireless Controller QoS Configuration Guide](https://www.cisco.com/c/en/us/td/docs/wireless/controller/ewc/17-13/config-guide/ewc_cg_17_13/quality_of_service.html)
Question 3 · Cloud and Hybrid Services Open

An engineer needs to extend the corporate phone system to mobile users who connect over the internet using their own devices. A requirement is to make this as simple as possible for end users. Which infrastructure component meets these goals?

Answer: B Cisco Expressway-C and Expressway-E provide Mobile and Remote Access (MRA) for endpoints outside the enterprise network. The pair enables secure firewall traversal and access to Unified CM collaboration services over the internet without requiring users to establish a VPN connection. **Learn more:** [Cisco Expressway MRA Overview](https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/expressway/config_guide/X14-2/mra/exwy_b_mra-deployment-guide-x142/exwy_m_mra-overview-and-planning.html) · [Cisco Jabber Remote Access Deployment Guide](https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/jabber/10_6/CJAB_BK_C56DE1AB_00_cisco-jabber-106-deployment-and-installation-guide/remote_access.html)