Implementing Cisco IP Telephony and Video, Part 2 (CIPTV2) Free Practice Test — 30 Questions

Question 1

A multinational corporation\'s Cisco IP Telephony and Video deployment is encountering significant challenges with video conferencing quality and intermittent call drops, particularly during peak usage hours. Analysis of network performance metrics reveals substantial packet loss and jitter on inter-site WAN links, directly correlating with periods of high video traffic volume. The current Quality of Service (QoS) configuration on the Cisco routers and switches applies a generic priority to all Real-time Transport Protocol (RTP) traffic. However, it does not differentiate between voice and video streams, nor does it adequately account for the stricter latency and jitter requirements of high-definition video conferencing endpoints. Considering the need to improve video call fidelity and reduce call failures without negatively impacting voice quality, which of the following strategic adjustments to the QoS implementation would most effectively address the observed degradation?

Accepted Answer

Implement a granular QoS policy that assigns a higher priority and stricter queuing mechanisms to video RTP traffic compared to voice RTP traffic and other data.

Question 2

A network administrator is troubleshooting a scenario where internal extensions within a Cisco Unified Communications Manager (CUCM) cluster are unable to complete calls to each other. The call attempts are failing, and the call detail records (CDRs) indicate that the call is being processed through a registered Cisco Unified Border Element (CUBEE) trunk. Both extensions are active and have valid configurations within CUCM. The CUBEE is correctly registered and functioning for external PSTN calls. What is the most probable cause for the failure of internal-to-internal extension calls in this specific configuration?

Accepted Answer

The Calling Search Space (CSS) assigned to the Device Pool of the CUBEE trunk does not include the partition containing the route pattern for the destination internal extension.

Question 3

A UC administrator is investigating persistent call setup failures for calls originating from Site A and destined for Site B. Internal calls within Site A and Site B are functioning normally, and the administrator has verified that the Cisco Unified Communications Manager (CUCM) cluster is healthy, with all nodes reachable and media resources properly registered. The WAN link between Site A and Site B is confirmed to be operational for data traffic. Analysis of call detail records (CDRs) shows that calls are not even reaching the point of media negotiation for inter-site connections. Which of the following is the most probable root cause for this specific inter-site call setup failure scenario?

Accepted Answer

Inaccurate or incomplete dial plan configurations and transformation patterns between CUCM and the WAN gateways responsible for inter-site connectivity.

Question 4

A global enterprise is migrating its IP telephony infrastructure to a new Cisco Unified Communications Manager (UCM) cluster, impacting thousands of users across multiple continents. The existing Cisco Unified Border Element (CUBE) infrastructure, responsible for PSTN connectivity and inter-site voice routing, must be seamlessly integrated with the new UCM cluster. A critical concern during this transition is maintaining compliance with varying regional regulations regarding emergency services (e.g., E911 in North America, similar services in Europe and Asia) and lawful intercept capabilities, which are configured and enforced at the CUBE level based on specific dial peers and call routing policies. The migration also involves updating dial plan translations and Call Admission Control (CAC) policies that were previously managed by the legacy UCM. Which of the following strategic approaches best addresses the technical and regulatory complexities of this migration, ensuring minimal disruption and full compliance?

Accepted Answer

Implement a staged migration of CUBE configurations to the new UCM cluster, prioritizing the re-establishment of emergency services and lawful intercept routing policies on the CUBE, followed by the migration of dial plan translations and CAC policies, with extensive pre- and post-migration testing at each phase.

Question 5

Anya, a senior network engineer, is configuring the Cisco Unified Communications Manager (CUCM) for a new deployment. She has enabled the \"Auto-off\" feature on her Cisco 8845 IP Phone. When Anya attempts to place an outgoing call to a colleague\'s extension, she observes that the call does not connect directly. Instead, the call is rerouted. Which of the following accurately describes the destination of this rerouted call as per CUCM\'s default behavior when the \"Auto-off\" feature is active?

Accepted Answer

The call is redirected to a configured service URL associated with the "Auto-off" softkey.

Question 6

A multinational corporation has deployed a Cisco Unified Communications Manager (CUCM) cluster across three geographically dispersed data centers to provide high availability for its IP telephony services. Employees at the primary data center site and a secondary site connected via dedicated MPLS links can successfully register their Cisco Unified IP Phones without issue. However, users at a third remote site, which connects to the corporate network through a third-party SIP trunk provider\'s managed network services, are experiencing intermittent failures in phone registration. Analysis of network monitoring tools reveals that while internal site phones maintain stable registration, phones at the remote site struggle to establish and maintain registration, often timing out during the initial handshake with the CUCM cluster. The SIP trunk provider asserts that their network is performing within normal parameters for standard data traffic.

Which of the following is the most probable root cause for the observed IP phone registration failures at the remote site?

Accepted Answer

Excessive network latency, jitter, or packet loss on the path between the remote site and the CUCM cluster, impacting the real-time registration signaling.

Question 7

Following a significant IP network re-addressing initiative that included changes to DHCP scopes, a large number of Cisco IP phones across multiple sites have become unregistered from Unified Communications Manager (CUCM). Initial investigations reveal that while phones can obtain IP addresses, they are unable to establish a connection with CUCM. The network team confirms that the core network routing is functional, and the CUCM cluster itself is operational. A review of the CUCM cluster configuration indicates no changes to the device pool settings or the IP phone configuration files themselves. Which of the following actions is the most critical first step to diagnose and resolve this widespread registration failure?

Accepted Answer

Verify that the DHCP server scopes for the affected subnets correctly point to the CUCM TFTP server IP addresses and that network firewalls do not block TFTP (UDP port 69) traffic between the phones and the TFTP servers.

Question 8

Consider a scenario where an IP phone (Endpoint A) capable of supporting G.711ulaw and G.729a codecs initiates a call to another IP phone (Endpoint B) that only supports G.729a and G.729b codecs. Assuming both endpoints are registered to the same Cisco Unified Communications Manager cluster and no specific codec restrictions are enforced at the gateway or dial plan level, which codec will be utilized for the media stream of this established call?

Accepted Answer

G.729a

Question 9

An administrator is troubleshooting a scenario where IP phones within a Cisco Unified Communications Manager (CUCM) cluster cannot establish outbound calls to the Public Switched Telephone Network (PSTN) via a connected Cisco IOS gateway. Internal calls function correctly. Gateway logs reveal recurring SIP error messages indicating that incoming INVITE requests from CUCM are being rejected with a cause code of 488. Analysis of the CUCM configuration shows that the Media Resource Group (MRG) and Media Resource Group List (MRGL) are correctly assigned to the gateway\'s device pool and that the regions involved are configured for G.711ulaw. The gateway\'s dial-peer configured for inbound calls from CUCM has the following configuration snippet: `voice class codec 100`, where voice class 100 is defined as `codec g729r8`. Which of the following actions would most effectively resolve the outbound calling issue by addressing the identified SIP error?

Accepted Answer

Modify the voice class 100 on the Cisco IOS gateway to include or prioritize G.711ulaw, or remove the specific codec restriction to allow CUCM's negotiated codec.

Question 10

During the implementation of a new Cisco Unified Communications Manager cluster for a multinational corporation, critical regulatory compliance updates for international call signaling are announced with immediate effect, significantly altering the previously defined dial plan architecture. The project team, led by Anya, has already completed substantial configuration work based on the initial specifications. Anya needs to steer the team through this unexpected change. Which of Anya\'s actions best exemplifies the behavioral competency of Adaptability and Flexibility in this scenario?

Accepted Answer

Anya convenes an emergency meeting to clearly communicate the new regulatory requirements, explain their impact on the existing dial plan, and facilitate a team discussion to brainstorm revised configuration strategies and update the project timeline accordingly.

Question 11

A global enterprise with dispersed offices in Tokyo, London, and New York is migrating its IP telephony infrastructure to a Cisco Unified Communications Manager (CUCM) environment. The primary objective is to reduce international toll charges by optimizing inter-site call routing. The network administrator is implementing a strategy that involves configuring SIP normalization profiles on CUCM and dial peers on a Cisco Unified Border Element (CUBE) gateway. Consider a scenario where an employee in Tokyo initiates a call to a colleague in London. The call must traverse the corporate network, potentially utilizing a SIP trunk connecting the Tokyo CUCM cluster to a central CUBE instance, which then routes the call to the London CUCM cluster via another SIP trunk. The administrator needs to ensure that the dialed digits from Tokyo are correctly translated and presented to the London system, and that the most cost-effective path is selected based on real-time PSTN access rates and internal network links. Which of the following configurations would be most effective in achieving this granular, cost-optimized routing of inter-site calls within this multinational deployment?

Accepted Answer

Implementing a comprehensive set of SIP normalization profiles on CUCM to modify Called Party Numbers and Calling Party Numbers, coupled with carefully crafted dial peers on the CUBE that use destination patterns matching the London office's numbering plan and source patterns identifying the Tokyo origin, to select the most economical trunk path.

Question 12

A large enterprise has recently acquired a smaller company that utilizes a distinct internal extension numbering plan. The IT department is tasked with integrating the acquired company\'s IP phones into the existing Cisco Unified Communications Manager (CUCM) infrastructure. The primary challenge is to ensure that employees from both organizations can communicate seamlessly while maintaining separate dialing authorities and preventing extension number conflicts. Considering the principles of CUCM dial plan design and best practices for managing multi-entity environments, what is the most effective strategic approach to accommodate the new numbering scheme and ensure proper call routing and access control?

Accepted Answer

Implement a unified partition structure for all internal extensions, utilizing specific calling search spaces (CSS) for each organizational unit to manage access and prevent number conflicts.

Question 13

A large enterprise, operating a multi-node Cisco Unified Communications Manager cluster, initiated a planned upgrade of the Publisher node to a newer software version. During the upgrade process, the Publisher node was taken offline as per procedure. Immediately following this, a significant number of users reported an inability to register their IP phones and place or receive calls, indicating a critical service disruption. Subsequent investigation revealed that one of the redundant Subscriber nodes, which should have assumed call processing responsibilities, failed to do so, exhibiting errors related to database synchronization. What is the most probable root cause of this widespread service failure?

Accepted Answer

The Subscriber node was unable to synchronize with the Publisher's database due to a network connectivity issue or a database replication failure, preventing it from becoming an active call processing agent.

Question 14

An administrator is tasked with resolving a call routing anomaly at a newly established remote office. IP phones within this office can successfully place and receive internal calls and calls to other company locations. However, attempts to place calls to external Public Switched Telephone Network (PSTN) numbers via the local Cisco IOS gateway result in immediate call failure, indicated by a busy tone or reorder tone. The administrator has meticulously verified the dial plan, route patterns, and route lists within Cisco Unified Communications Manager (CUCM), confirming their accuracy and proper association with the gateway. The gateway itself is registered with CUCM, and its interface to the PSTN is active. What specific configuration element on the Cisco IOS gateway is the most probable cause for this selective PSTN call failure, assuming the CUCM configuration is sound?

Accepted Answer

An incorrectly applied `voice class restriction` on the gateway's PSTN dial peer that is blocking the dialed PSTN number ranges.

Question 15

A telecommunications engineer is troubleshooting intermittent call setup failures and one-way audio issues experienced by remote users connecting to the corporate Cisco Unified Communications Manager (CUCM) cluster via Cisco AnyConnect VPN. Basic network connectivity, DNS resolution, and the VPN tunnel itself have been confirmed as operational. The problem is sporadic and affects only a portion of the remote user base. The administrator has ruled out general network congestion and has confirmed that the internal users are not experiencing similar issues. The CUCM cluster is configured with multiple regions and locations to manage bandwidth and call routing. What specific configuration aspect, most likely related to media path optimization and resource allocation for remote endpoints, should the engineer prioritize for investigation to resolve these intermittent call quality problems?

Accepted Answer

Review and potentially reconfigure the Media Resource Group List (MRG List) assigned to the device pool utilized by the remote AnyConnect users.

Question 16

A distributed engineering team responsible for implementing a complex Cisco Unified Communications Manager (CUCM) upgrade is experiencing significant delays and increased interpersonal friction. The team recently transitioned to a new suite of cloud-based collaboration tools, and project priorities have shifted twice in the last quarter due to evolving client requirements and emerging security vulnerabilities. Team members express frustration with the learning curve of the new tools, a perceived lack of clarity on current objectives, and a feeling that their contributions are not being effectively integrated. What strategy would most effectively address these multifaceted challenges and restore team cohesion and project momentum?

Accepted Answer

Implement a structured onboarding program for the new collaboration tools, conduct focused workshops on effective remote communication and conflict resolution, and establish a transparent communication channel for daily priority updates and strategic rationale.

Question 17

A network administrator is troubleshooting a Cisco Unified Communications Manager (CUCM) cluster experiencing a complete outage in call processing. All incoming and outgoing calls are failing. Upon reviewing the SIP trunk configuration between CUCM and a Cisco ISR gateway, it is discovered that the SIP trunk security profile on CUCM is configured for \"Encrypted Only.\" Simultaneously, the gateway is configured to establish a \"Non-Secure\" SIP signaling connection. The administrator needs to restore call functionality immediately while minimizing disruption and ensuring a stable configuration. Which adjustment to the CUCM SIP trunk security profile will most effectively resolve this issue?

Accepted Answer

Configure the SIP trunk security profile to "Non-Secure"

Question 18

A large enterprise is migrating its IP telephony infrastructure to a new Cisco Unified Communications Manager (CUCM) cluster. During the integration phase with a new third-party SIP trunk provider, users are experiencing intermittent call failures and poor audio quality. Analysis of the SIP traces reveals that the third-party Session Border Controller (SBC) is not consistently processing the Session Description Protocol (SDP) attributes within the INVITE messages, particularly concerning early media indicators and codec preferences, leading to session setup failures. The IT department needs a solution that can be implemented immediately on their network edge devices to ensure call stability while working with the SIP provider to resolve the underlying SBC configuration. Which strategy would be most effective in mitigating these immediate interoperability challenges?

Accepted Answer

Configure Cisco Unified Border Element (CUBE) devices to normalize SIP INVITE messages by manipulating SDP attributes and re-transmitting specific SIP signaling elements to align with the third-party provider's expected behavior.

Question 19

A global enterprise is undertaking a phased migration from its on-premises Cisco Unified Communications Manager (CUCM) cluster to Cisco Webex Calling. Several branch offices will retain their existing Cisco ISR routers with integrated PSTN gateways and will operate in SRST (Survivable Remote Site Telephony) mode during the transition and potentially for a period post-migration for local call survivability. To ensure these branch users can seamlessly place and receive calls to and from the Webex Calling cloud, and leverage features such as global dialing and conferencing, what is the most appropriate Cisco IOS-based solution for interworking the on-premises SRST environment with the Webex Calling cloud?

Accepted Answer

Deploying Cisco Unified Border Element (CUBE) on the ISR routers to establish a SIP trunk with Webex Calling, managing signaling and media interworking.

Question 20

A telecommunications enterprise has recently acquired a smaller firm that operates its own independent Cisco Unified Communications Manager (CUCM) cluster. The acquiring company\'s IT department is tasked with integrating the subsidiary\'s telephony infrastructure into the main corporate network. This integration must not only allow for seamless inter-cluster calling but also ensure the continued functionality of advanced collaboration features such as Cisco Unified Mobility (CUM) and Cisco Unified Presence (CUP) for users in both organizations. The subsidiary\'s CUCM cluster utilizes a significantly different internal numbering plan and dial plan structure compared to the corporate standard. What is the most appropriate technical solution to facilitate this comprehensive integration, enabling robust call routing and feature synchronization between the two distinct CUCM environments?

Accepted Answer

Configure a Cisco Unified Communications Manager (CUCM) Inter-Cluster Trunk (ICT) with appropriate signaling protocols and dial plan normalization.

Question 21

A multinational corporation is deploying Cisco Unified Communications across its global network, with a central CUCM cluster in North America serving multiple international branches. Each branch has a significant number of IP phones and requires continued internal calling and PSTN access even if the WAN link to the central data center fails. To meet these business continuity requirements, Cisco ISR routers at each branch are configured with Cisco Unified Communications Manager Express (CME). During a simulated network failure where the connection to the central CUCM cluster is severed, what is the primary mechanism that enables IP phones at a branch to continue making internal calls and accessing the local PSTN gateway?

Accepted Answer

The ISR routers, configured with CME, act as local survivable remote sites, providing independent call processing and PSTN gateway functionality for the branch.

Question 22

A global enterprise is experiencing significant degradation in voice call quality and intermittent disruptions for its remote employees connecting to the corporate Cisco Unified Communications Manager (CUCM) cluster via a secure VPN. Network monitoring indicates elevated levels of packet loss and jitter on the WAN links and within the VPN tunnel, predominantly affecting Real-time Transport Protocol (RTP) streams. The IT department has confirmed that the CUCM cluster itself is functioning optimally and that the issue is network-related, specifically impacting the transport of real-time media. Which of the following actions, when implemented as an initial step, would most effectively address the described symptoms by prioritizing the critical real-time traffic?

Accepted Answer

Configure VPN gateways and edge routers to mark all RTP traffic with a DSCP value of EF ($46$) and video traffic with AF41 ($34$) to enable preferential queuing.

Question 23

A multi-site enterprise network, leveraging Cisco Unified Communications Manager (CUCM) clusters, is encountering sporadic call setup failures for internal calls routed between branch offices. Investigation reveals that when users on specific Cisco IP Phone models initiate calls, and their preferred codec list includes G.722 and then G.711ulaw, the Cisco Unified Border Elements (UBE) at the edge of these branches are discarding the initial SIP INVITE messages. This behavior is not consistent across all branches and appears to be linked to the codec capabilities of the downstream PSTN gateways connected to those UBEs. Which of the following strategic adjustments to the UBE\'s SIP trunk configuration would most effectively mitigate these intermittent call setup failures by ensuring robust codec negotiation and preventing INVITE message discards?

Accepted Answer

Modifying the SIP Trunk Security Profile on the UBE to enforce a specific codec preference order (e.g., G.711ulaw first, then G.722) that aligns with the capabilities of the downstream PSTN gateways.

Question 24

A multinational corporation is expanding its operations into a country with stringent regulations mandating specific call recording protocols for financial services and requiring all customer interaction data to be stored within national borders. The existing Cisco Unified Communications Manager (UCM) cluster is currently configured for a different region with less restrictive data handling and no mandatory call recording requirements. Which of the following strategies best addresses the technical and compliance challenges of integrating the new operations into the unified IP telephony environment?

Accepted Answer

Deploy a geographically distributed UCM cluster in the new country, integrate it with a compliant call recording solution that supports the required signaling protocols, and meticulously reconfigure the dial plan to adhere to local numbering and emergency call conventions.

Question 25

A multinational corporation\'s Cisco IP Telephony infrastructure, spanning multiple continents and connected via dedicated WAN links, is experiencing sporadic call setup failures exclusively between its European headquarters and its Asian branch office. Internal calls within each site are consistently successful, and calls to other international locations are also unaffected. The IT support team has confirmed that basic network connectivity between the two affected sites is stable, with no significant packet loss or excessive latency under normal operating conditions. However, during periods of high network utilization, a noticeable increase in call failures between these specific locations is observed. Which of the following diagnostic steps is most likely to reveal the root cause of these intermittent call setup failures, considering the advanced concepts of Cisco IP Telephony and potential network constraints?

Accepted Answer

Reviewing Call Admission Control (CAC) configurations between the European and Asian sites, focusing on location-based bandwidth allocations and RSVP agent status if deployed.

Question 26

During the deployment of a new Cisco Unified Communications Manager (CUCM) cluster designed to support a geographically dispersed workforce, a critical issue arose where remote users connecting via VPN reported intermittent call failures and degraded audio quality. Initial diagnostics revealed that remote user phones were experiencing registration issues and were unable to reliably establish media sessions. A senior network engineer is investigating the possibility that misconfigurations in the inter-cluster SIP trunk, specific dial peer routing, and the assignment of Media Resource Groups (MRGs) for shared resources are contributing factors. Which of the following systematic approaches would be most effective in diagnosing and resolving this complex connectivity and resource access problem for VPN-connected endpoints?

Accepted Answer

Examine the SIP trunk configuration for correct transport protocol, port, and IP address settings, verify dial peer patterns for accurate routing to remote sites, and confirm that MRGs are correctly assigned to the relevant phone configurations and media resources to ensure proper call signaling and media path establishment.

Question 27

During the implementation of a new Cisco Unified Communications Manager (CUCM) cluster for a multinational corporation, project priorities unexpectedly shift due to a sudden regulatory compliance mandate requiring enhanced call recording features across all regions. This mandate directly impacts the previously agreed-upon deployment schedule and the allocation of specialized network engineers. The project lead, Anya, receives this directive late on a Friday afternoon. Which of the following actions best exemplifies Anya\'s adaptive and flexible approach to this significant change?

Accepted Answer

Immediately convene an emergency meeting with the core technical team to analyze the compliance mandate's technical implications, re-evaluate resource needs, and propose revised deployment phases, while also communicating the situation transparently to stakeholders.

Question 28

A global enterprise is deploying a new Cisco IP Telephony infrastructure across several continents. The primary CUCM cluster is located in North America, with regional clusters in Europe and Asia. Each regional cluster connects to its local PSTN via a Cisco CUBE. A user in the European office dials a local extension in the Asian office. The European CUBE receives the call and must route it to the Asian CUBE. The dialing plan in Europe requires users to dial a 7-digit local number, while the Asian PSTN gateway expects an 11-digit number, including a country code and a trunk access code. Specifically, to reach an Asian extension from Europe, the dialed 7-digit number needs to be prepended with \'001186\' (country code and trunk access code). Which of the following configurations on the European CUBE is most effective for ensuring this call is correctly routed and transformed to meet the Asian gateway\'s requirements?

Accepted Answer

A voice dial-peer configured with a destination-pattern matching the 7-digit European extension, a session target pointing to the Asian CUBE's IP address, and a digit-transform-rule that adds '001186' to the beginning of the dialed number.

Question 29

A network administrator is troubleshooting a persistent issue where users in a newly deployed branch office cannot successfully place emergency calls (e.g., 911 or equivalent). Internal extension dialing and standard external outbound calls are functioning without any reported problems. The network infrastructure is standard Cisco Unified Communications, and the branch office phones are registered and operational for all other call types. Analysis of the call detail records (CDRs) for the affected users shows that emergency calls are being initiated but are failing to connect to the Public Switched Telephone Network (PSTN) gateway designated for emergency services. The administrator has verified that the PSTN gateway itself is operational and can successfully route emergency calls when tested from other locations.

Which of the following misconfigurations is the most probable root cause for this specific failure scenario?

Accepted Answer

The Cisco Extended Services Provider is not correctly configured or enabled for the device pool associated with the branch office phones, preventing the invocation of the emergency calling service URL.

Question 30

Consider a scenario where a remote employee, connected via a site-to-site VPN to the main corporate network, initiates a call to another remote employee also connected through the same VPN but originating from a different branch office. The VPN tunnel connecting the main campus to this second branch office has a significantly lower allocated bandwidth. During the call setup, what mechanism within Cisco Unified Communications Manager (CUCM) is primarily responsible for ensuring that the chosen audio codec adheres to the limited bandwidth of the VPN tunnel, thereby preventing call degradation and maintaining service quality, even if a higher-bandwidth codec would otherwise be preferred by the endpoints\' regions?

Accepted Answer

CUCM's location-based call admission control dynamically negotiating the most bandwidth-efficient codec supported by both endpoints within the constraints of the configured inter-location bandwidth allocation.

Implementing Cisco IP Telephony and Video, Part 2 (CIPTV2) Free Practice Test — 30 Questions

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