Multi-select questions tell you to 'Choose TWO' or 'Choose THREE'. Getting partial credit is not a thing — you must select all correct answers with no incorrect ones. The stem always states how many to choose, so trust it. These questions require precision, not best-guess elimination.
Start Scenario PracticeWhich THREE of the following factors impact the quality of video calls in a network?
Explanation: Packet loss (A) is correct because dropped RTP/UDP packets in a video stream cause visible artifacts, freezing, and audio gaps, directly degrading call quality. Jitter (C) is correct because variation in packet inter-arrival times disrupts the playout buffer, causing choppy audio and stuttering video even when average delay is acceptable. Latency (E) is correct because high end-to-end delay (typically above 150 ms one-way) impairs interactivity and, combined with jitter and loss, degrades the real-time experience. Interface description (B) is only a text label on an interface and has no effect on traffic handling, and router uptime (D) is an availability metric that does not by itself determine video quality as long as the device is forwarding packets.
Which THREE actions are possible using SIP profiles on a CUBE?
Explanation: SIP profiles on Cisco Unified Border Element (CUBE) are used to manipulate SIP signaling by inspecting and altering SIP messages, so option A (Modify SIP headers) is correct because rules within a SIP profile can rewrite existing header values such as From, To, or Diversion. Option B (Add SIP headers) is correct because SIP profiles support the 'request' and 'response' header-insertion rules that inject new headers into inbound or outbound SIP messages. Option C (Remove SIP headers) is correct because SIP profiles can strip unwanted headers via header-removal rules, which is common for privacy or interop scenarios. Option D (Change voice codec) is not a SIP-profile function; codec negotiation is handled by dial peers (codec preference lists, 'codec' commands) and SDP, not by SIP header manipulation. Option E (Route calls to PSTN) is also not a SIP-profile action; call routing is determined by dial-peer matching and translation rules, while SIP profiles only affect SIP message content.
A collaboration engineer is deploying Cisco Webex Hybrid Message Service with Cisco Unified Communications Manager (CUCM) and Expressway-C. The requirement is to enable secure instant messaging and presence between on-premises CUCM users and Webex. Which two components are required for this deployment? (Choose two.)
Explanation: Hybrid Message Service requires the Expressway-C with the Hybrid Message Service connector and the on-premises IM and Presence Service. The connector bridges the on-premises IM and Presence with Webex, enabling secure instant messaging and presence federation. Other components like Webex Meetings Server, VCS, or CUBE are not part of this architecture.
Which THREE network conditions contribute to poor VoIP call quality in an RTP stream?
Explanation: Latency (A) is correct because one-way delay above roughly 150 ms degrades RTP voice interactivity, causing talk-over and echo that the jitter buffer cannot fix. Jitter (C) is correct because variable inter-packet arrival times force the jitter buffer to either underrun (clipping) or grow (added delay), directly harming voice quality. Packet Loss (D) is correct because dropped RTP packets cannot be retransmitted in real time, so codecs conceal the gaps, producing robotic or choppy audio. High MTU (B) is not inherently harmful—fragmentation is the real risk—and Fast switching (E) is a LAN forwarding behavior, not a WAN impairment affecting RTP quality.
A network designer is implementing QoS for a Cisco Collaboration deployment. Which two statements about the trust boundary in a Cisco QoS design are true? (Choose two.)
Explanation: The trust boundary should be as close to the source as possible, and Cisco IP Phones can be trusted to mark voice and signaling traffic correctly. This ensures that QoS markings are preserved end-to-end and that other devices trust them. Placing the boundary at the core or trusting all PC traffic is not recommended.
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Practice all Select Two (Multi-Select) QuestionsMulti-select questions tell you to 'Choose TWO' or 'Choose THREE'. Getting partial credit is not a thing — you must select all correct answers with no incorrect ones. The stem always states how many to choose, so trust it. These questions require precision, not best-guess elimination. These appear throughout the CLCOR and require you to apply your knowledge, not just recall facts.
Cisco doesn't publish an exact breakdown, but scenario-based questions (especially exhibit and command-output formats) make up a significant portion of the CLCOR. Practicing each scenario type ensures you're ready for any format.
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