Implementing Cisco Collaboration Core Technologies (CLCOR) Free Practice Test — 30 Questions

Question 1

A global enterprise is transitioning its entire workforce to a hybrid work model and simultaneously upgrading its Cisco collaboration infrastructure to support enhanced video conferencing and instant messaging capabilities. The network architecture includes multiple WAN links with varying bandwidth capacities and latency characteristics connecting regional offices to the central data center where the CUCM cluster resides. The IT department has observed intermittent call quality degradation and occasional video feed stutters, particularly during periods of high network utilization originating from non-collaboration applications like large file transfers and data backups. To proactively address these issues and ensure a superior end-user experience for all collaboration services, what is the most effective strategic approach to implement and manage Quality of Service (QoS) across the entire network infrastructure?

Accepted Answer

Implement a hierarchical QoS model with strict priority queuing for voice and video traffic, coupled with traffic shaping on WAN egress points and policing on ingress points to manage bandwidth consumption and prevent congestion.

Question 2

A multinational corporation\'s remote workforce is reporting consistent degradation in audio quality during video conferences hosted on their Cisco collaboration platform. The issues manifest as robotic voices, dropped audio packets, and a general lack of clarity, exclusively affecting users connecting from their home offices. On-site participants experience pristine audio. What is the most effective initial diagnostic step to pinpoint the root cause of this widespread remote audio degradation?

Accepted Answer

Analyze real-time network statistics, specifically jitter and packet loss, on the network segments connecting remote users to the collaboration infrastructure.

Question 3

A global organization is migrating its entire communication infrastructure from a dated, on-premises PBX system to a modern, cloud-based unified communications platform. The project aims to enhance collaboration, reduce operational costs, and improve user experience. Anya, the project lead, is overseeing the technical deployment and the subsequent user enablement strategy. Early feedback indicates significant user apprehension regarding the new interface and a perceived loss of familiar functionalities. Some departments are also concerned about the potential impact on their specialized workflows. Anya\'s team is technically proficient in the new platform, but user adoption rates are currently lagging behind projections, and several support tickets are related to basic usability issues rather than complex technical faults.

Considering the multifaceted challenges of this technology adoption, which of Anya\'s behavioral competencies is most critical to ensure the project\'s ultimate success and widespread acceptance of the new collaboration platform?

Accepted Answer

Customer/Client Focus

Question 4

A critical SIP trunk supporting voice and video services for a large enterprise experiences a complete loss of connectivity due to a failure in a key network segment. This outage renders all calls routed via this trunk unavailable, impacting a significant user base. The IT operations team has confirmed the underlying network segment failure is the root cause and that repairs are not immediate. The company\'s collaboration architecture includes redundant SIP trunks and multiple ingress gateways managed by Cisco Unified Communications Manager (CUCM). What is the most effective immediate step to restore voice and video services for the affected users?

Accepted Answer

Reconfigure the affected Cisco Unified Communications Manager (CUCM) cluster to utilize an alternate SIP trunk with a different ingress gateway.

Question 5

A large enterprise is experiencing an unprecedented surge in concurrent user sessions on its Cisco collaboration platform, coinciding with the recent deployment of a new, resource-intensive real-time analytics application. The existing infrastructure, designed for prior usage patterns, is showing signs of strain, impacting call quality and application responsiveness. The IT team needs to implement an immediate strategy to ensure the continued availability and performance of both established voice/video services and the new analytics application. Which of the following approaches would be most effective in addressing this complex operational challenge?

Accepted Answer

Dynamically scale the virtualized collaboration infrastructure resources (CPU, memory, storage) and optimize Quality of Service (QoS) policies to prioritize critical collaboration traffic, while closely monitoring performance metrics for real-time adjustments.

Question 6

A network administrator is troubleshooting a collaboration system where users can successfully dial internal voicemail pilot numbers to access their messages. However, when attempting to dial the number for an internal automated attendant service, the calls fail to connect, resulting in a busy signal or an unallocated number message. The administrator has verified that the automated attendant service is active and configured correctly within the system, and the phone itself is registered and functioning for internal calls. Which of the following is the most probable underlying cause for this specific service reachability issue?

Accepted Answer

The Partition containing the automated attendant's directory number is not included in the Calling Search Space assigned to the user's device.

Question 7

A global enterprise\'s collaboration suite is experiencing significant disruptions for its geographically dispersed workforce. Users report frequent dropped audio and video calls, delayed message delivery, and an inability to share screens reliably during peak usage hours, indicative of unstable network conditions affecting real-time data flow. The IT operations team has identified that while the core network infrastructure is generally stable, localized network variances and fluctuating bandwidth are the primary culprits. Which of the following strategies, implemented within the collaboration platform itself, would most effectively enhance user experience and maintain operational continuity during these intermittent connectivity challenges?

Accepted Answer

Activating adaptive media features and configuring granular Quality of Service (QoS) policies to prioritize real-time traffic.

Question 8

A global enterprise has deployed a Cisco Unified Communications Manager (CUCM) cluster serving users across multiple continents. Recently, support tickets have surged, detailing instances of dropped calls, distorted audio, and video freezing, with a disproportionate impact on users connecting from remote locations. Initial troubleshooting has ruled out endpoint hardware failures and basic CUCM service disruptions. The network team reports that while overall bandwidth utilization is within acceptable limits, there are occasional spikes in latency and jitter on certain inter-site WAN links, particularly during peak business hours. Considering the nature of the reported problems and the network observations, which of the following strategic technical implementations would most effectively address the root cause of these collaboration service degradations?

Accepted Answer

Implement a comprehensive Quality of Service (QoS) strategy across the WAN and LAN infrastructure, prioritizing real-time media traffic through classification, marking, queuing, and shaping.

Question 9

During a critical migration from an on-premises Cisco Unified Communications Manager to Cisco Webex Calling, a collaboration engineer, Anya, observes her team exhibiting hesitancy and uncertainty due to the shift in operational paradigms. Which combination of behavioral competencies would be most instrumental for Anya to effectively lead her team through this transition, ensuring both technical success and team cohesion?

Accepted Answer

Adapting strategies to address team concerns, clearly communicating the benefits of the new platform, and actively facilitating open dialogue to resolve any emerging disagreements.

Question 10

Anya, a collaboration engineer, is implementing a hybrid cloud strategy, connecting an on-premises Cisco Unified Communications Manager (CUCM) cluster to a new cloud-based contact center solution. The critical requirement is to ensure uninterrupted service for customer calls even if the primary internet circuit connecting to the cloud provider experiences a failure. Anya must configure the CUCM to intelligently reroute all inbound and outbound calls to an alternate cloud endpoint if the primary connection becomes unavailable. Which of the following actions is paramount for achieving this high availability requirement?

Accepted Answer

Establish and configure a redundant SIP trunk to a geographically diverse, secondary cloud endpoint.

Question 11

During a critical client demonstration involving a Cisco Unified Communications Manager (CUCM) deployment, participants experienced sporadic instances of audio garbling and complete audio dropouts, particularly during video streams with high motion. Network monitoring revealed occasional spikes in jitter and packet loss on trunk links and access layer switches, affecting UDP traffic flows associated with the collaboration endpoints, despite overall bandwidth utilization remaining below 70%. What is the most prudent initial troubleshooting action to address these symptoms?

Accepted Answer

Thoroughly review and validate the end-to-end Quality of Service (QoS) configuration, including classification, marking, queuing, and shaping policies applied to real-time media traffic.

Question 12

A multinational corporation is experiencing persistent, but sporadic, call failures for a segment of its employees located at a geographically dispersed branch office. These users report that calls are unexpectedly terminating mid-conversation and that they are sometimes unable to initiate new calls for brief periods. The central collaboration cluster, hosted in a primary data center, appears to be functioning normally, with no reported issues for users at the main campus. The IT support team has confirmed that the network connectivity between the branch and the data center is generally stable, with acceptable latency under normal conditions. Given this scenario, which of the following is the most probable root cause for these intermittent call disruptions?

Accepted Answer

A misconfigured or overloaded Survivable Remote Site Telephony (SRST) gateway at the remote branch office.

Question 13

A global enterprise is migrating its Cisco collaboration infrastructure to a new version of Cisco Unified Communications Manager (CUCM), incorporating enhanced Transport Layer Security (TLS) protocols for both signaling and media streams to bolster security. Following the upgrade, a significant number of older analog phones and early-generation IP phones are failing to register with the CUCM cluster. Analysis indicates that these devices lack support for the newly enforced, more restrictive TLS cipher suites. The IT department needs to devise a strategy that ensures these legacy devices can connect securely without compromising the overall security posture of the upgraded system. Which of the following administrative actions best addresses this scenario while adhering to best practices for phased security implementation?

Accepted Answer

Create a custom security profile within CUCM that permits a wider range of compatible TLS cipher suites for the affected legacy endpoint groups, while maintaining the default, more stringent profile for newer devices.

Question 14

During a comprehensive review of a newly deployed Cisco Unified Communications Manager (CUCM) cluster, a network administrator observes that several IP phones are failing to register, and users are reporting intermittent issues with call setup and presence updates. Analysis of the network traffic reveals that SIP signaling messages, intended for the CUCM servers, are not consistently arriving at their destination. Which specific transport layer protocol and associated default port are most likely experiencing an issue that would lead to these observed symptoms?

Accepted Answer

UDP port 5060

Question 15

Consider a multinational corporation migrating its collaboration infrastructure to a hybrid model. The organization maintains a robust, on-premises Cisco Unified Communications Manager (CUCM) cluster for its established workforce but wants to leverage Cisco Webex Calling for new remote employees and enhanced collaboration features. A critical requirement is to ensure that all employees, regardless of their platform, can seamlessly initiate and receive external PSTN calls. Furthermore, they need to maintain a single, unified dial plan and ensure call routing efficiency. Which Cisco solution is most instrumental in bridging the on-premises CUCM environment with the cloud-based Webex Calling infrastructure to achieve this unified PSTN connectivity and dial plan integration?

Accepted Answer

Cisco Unified Border Element (CUBE)

Question 16

A network administrator is troubleshooting a call setup issue between two branch offices. Endpoint A, located in Office Alpha, is configured to prioritize the G.722 codec for superior audio fidelity. Endpoint B, situated in Office Beta, is restricted to using the G.711 codec due to legacy hardware limitations. The Wide Area Network (WAN) link connecting Office Alpha and Office Beta has a provisioned bandwidth of $64$ kbps. During the call attempt from Endpoint A to Endpoint B, the Cisco Unified Communications Manager (CUCM) attempts to establish the call. Which of the following outcomes is most likely to occur, considering the configured codecs and the WAN link capacity?

Accepted Answer

The call will fail due to insufficient bandwidth on the WAN link for either the G.722 or G.711 codec.

Question 17

Consider a scenario within a Cisco collaboration environment where an engineer, Anya, working from her desk phone, dials her own direct extension number. The system administrator has configured the dial plan such that Anya\'s extension is a valid and active Directory Number within the CUCM cluster. What is the most probable outcome of Anya dialing her own extension number?

Accepted Answer

The call is routed to Anya's own phone extension, potentially resulting in a busy signal or an internal loopback.

Question 18

A network administrator is troubleshooting a scenario where Cisco Jabber clients are experiencing intermittent issues with video conferencing capabilities when connecting to a Cisco Unified Communications Manager (CUCM) cluster. The administrator suspects that the CUCM is not accurately identifying the full range of video codecs and advanced collaboration features supported by the Jabber clients before attempting to establish sessions. Which SIP method would be most instrumental for the CUCM to proactively query and confirm the Jabber clients\' supported capabilities, thereby ensuring optimal session establishment and feature negotiation?

Accepted Answer

SIP OPTIONS

Question 19

Anya, a project manager overseeing the deployment of a new cloud-based collaboration suite, observes that her technical team is struggling to integrate the system with the company\'s existing on-premises infrastructure. Team members express frustration with the unfamiliar configuration interfaces and the perceived complexity of advanced features like media path optimization and QoS policy enforcement. Despite initial training, adoption of new workflows is slow, and many are reverting to older, less efficient methods. Anya recognizes that fostering a culture of adaptability and flexibility is paramount to successfully transitioning to the new environment. Which of Anya\'s potential actions would most directly cultivate these essential behavioral competencies within her team?

Accepted Answer

Implement a pilot program for a specific team to test and refine new integration procedures, encouraging them to document challenges and propose innovative solutions, thereby demonstrating openness to new methodologies and maintaining effectiveness during transitions.

Question 20

Consider a global enterprise rolling out a unified communications platform, replacing several disparate legacy systems. Initial feedback indicates significant user apprehension regarding the learning curve and potential disruption to existing communication patterns. The project team is tasked with maximizing adoption and ensuring a smooth transition across diverse departments with varying technical proficiencies. Which of the following strategies would most effectively address the user apprehension and drive successful adoption of the new platform?

Accepted Answer

Establish a dedicated, multi-channel support system featuring live Q&A sessions, comprehensive digital guides, and a network of departmental "collaboration champions" who receive advanced training to assist their colleagues.

Question 21

A network administrator is evaluating the capacity of a session border controller (SBC) for a new enterprise collaboration deployment. The SBC is specified to support up to 10,000 registered endpoints and is rated for a maximum of 5,000 concurrent sessions. The anticipated average call duration for voice and video sessions is approximately 4 minutes. Considering the SBC\'s design specifications for handling simultaneous communication streams, what is the maximum number of simultaneous calls the SBC can support under peak load conditions?

Accepted Answer

5,000

Question 22

A global enterprise utilizing a Cisco collaboration suite for its distributed workforce is encountering significant issues with real-time communication quality. Remote employees connecting via the corporate WAN are reporting frequent instances of choppy audio and dropped video frames, particularly during their busiest working hours. Network monitoring reveals elevated UDP packet loss and jitter on the primary WAN links, coinciding with periods of high network utilization. The IT infrastructure team has confirmed that the collaboration endpoints are configured to use standard UDP ports for media, and basic network connectivity is stable. Analysis of traffic patterns indicates that the degradation is most pronounced for inbound media streams arriving at remote sites.

Which of the following strategies, when implemented across the network infrastructure, would most effectively mitigate these real-time media quality issues by ensuring preferential treatment for voice and video traffic during periods of congestion?

Accepted Answer

Implement Low Latency Queuing (LLQ) for voice traffic marked with DSCP EF (46) and Class-Based Weighted Fair Queuing (CBWFQ) for video traffic marked with DSCP AF41 (34) on all WAN edge routers and core switches.

Question 23

A multinational corporation is migrating its entire on-premises Cisco collaboration infrastructure to Cisco Collaboration Flex Plan, involving a complete re-architecture of its dial plan. The existing on-premises setup utilizes intricate Route Patterns, Route Lists, and Route Groups to manage internal extensions, PSTN connectivity via multiple gateways, and specific call forwarding rules for different business units. During the migration planning, the engineering team needs to ensure that the new cloud-based dial plan in Webex Control Hub effectively replicates the functionality of the legacy system, particularly for inter-site calls and external access, without requiring users to alter their existing dialing habits. Which fundamental shift in call routing configuration management is most critical for the team to understand and implement to achieve this seamless transition?

Accepted Answer

Transitioning from device-centric dial plan configuration to policy-based call routing managed through cloud administration portals.

Question 24

A global enterprise has recently deployed a new Cisco collaboration solution, featuring a CUCM cluster serving both on-premises and remote users. Following the deployment, the IT support team has been receiving reports of sporadic call failures exclusively affecting remote users. Initial diagnostics confirm that the CUCM servers are healthy, and basic network reachability to these remote users is established. The failures are not consistent; some calls complete successfully, while others drop mid-conversation or fail to establish altogether. The team has verified that all necessary licenses are provisioned and that the remote user devices are registered to CUCM. Given this context, which of the following areas, if improperly configured, would most likely contribute to these intermittent call failures for remote users?

Accepted Answer

Session Border Controller (SBC) or Cisco Unified Border Element (CUBE) configuration, particularly regarding SIP trunk parameters and QoS handling for remote media.

Question 25

A global enterprise has reported a significant and consistent degradation in the quality of its real-time collaboration services, manifesting as choppy audio and frozen video streams for users across multiple branch locations. Initial user feedback points to intermittent but pervasive issues rather than isolated incidents. The IT department suspects that network inefficiencies are the primary culprit, impacting the performance of voice and video conferencing platforms. Which of the following strategies represents the most proactive and comprehensive approach to diagnose and remediate these collaboration service quality issues?

Accepted Answer

Establish a dedicated help desk team to solely address individual user complaints regarding voice and video quality as they are reported.

Question 26

When a global enterprise deployment of Cisco Unified Communications Manager (CUCM) and Cisco TelePresence endpoints experiences widespread, intermittent audio dropouts and video synchronization delays for users connecting via a shared Wide Area Network (WAN) link, and network diagnostics reveal that the WAN link is frequently exceeding its provisioned bandwidth capacity during peak hours, which of the following strategic network optimizations would most effectively address these symptoms by ensuring consistent quality for real-time media traffic?

Accepted Answer

Implement a comprehensive Quality of Service (QoS) policy across all network segments, including classification and marking of voice and video traffic with appropriate DSCP values, followed by hierarchical queuing (HQoS) on WAN interfaces to prioritize real-time media over bulk data, and employ Random Early Detection (RED) to manage congestion proactively.

Question 27

A multinational corporation is implementing a new unified collaboration suite across its global workforce, aiming to streamline communication and project management. Many employees, particularly those in long-established roles and working remotely, express apprehension about the learning curve and potential disruption to their daily workflows. The project team is concerned about maintaining productivity and ensuring user adoption. Which of the following strategies would be most effective in fostering adaptability and ensuring successful integration of the new platform?

Accepted Answer

Develop and deliver a multi-modal training program including live demonstrations, interactive workshops, and self-paced modules, coupled with readily accessible expert support channels and a clear communication plan highlighting the benefits and use cases relevant to different departments.

Question 28

A large enterprise is undertaking a significant technological shift, migrating its entire on-premises Cisco Unified Communications Manager (CUCM) infrastructure to a cloud-based Cisco Webex Calling platform. The project aims to enhance scalability, improve remote work capabilities, and streamline management. During the planning phase, the project lead must outline a strategy that not only ensures the technical success of the migration but also prioritizes user adoption and minimizes disruption to daily operations. What strategic approach best balances these critical objectives?

Accepted Answer

Implement a phased migration by department, starting with a pilot group, accompanied by comprehensive pre-migration training, clear communication of benefits and timelines, and readily available post-migration support channels to address user queries and issues promptly.

Question 29

Consider a scenario where a Cisco Unified Communications Manager (CUCM) user, Avani, has configured two distinct call forwarding behaviors: \"Forward All Calls\" to extension 5001 and \"Forward Busy/Unreachable\" to extension 5002. If Avani is currently engaged in an active call and another incoming call arrives, which destination will the new incoming call be routed to, based on standard CUCM call processing logic?

Accepted Answer

Extension 5001

Question 30

Consider a global enterprise undergoing a complex migration from an on-premises legacy communication system to a modern cloud-based collaboration platform. Anya, the project lead, discovers a critical, zero-day vulnerability in the existing system that requires immediate remediation. This remediation effort will consume significant resources and attention, potentially impacting the carefully planned migration schedule. Simultaneously, a key business unit is experiencing significant productivity losses due to the limitations of the current system and is pushing for an accelerated deployment of specific collaboration features from the new platform. Anya must now navigate this dual challenge, balancing urgent security needs with critical business demands and managing the inherent uncertainty. Which combination of behavioral competencies is most essential for Anya to effectively lead her team through this dynamic and high-stakes situation?

Accepted Answer

Adaptability and Flexibility, Communication Skills, and Problem-Solving Abilities

Implementing Cisco Collaboration Core Technologies (CLCOR) Free Practice Test — 30 Questions

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