You are performing a network readiness assessment for a Cisco Webex Room Kit deployment. The current network uses a legacy infrastructure with a MTU of 1500 bytes. What is the recommended practice for handling potential fragmentation issues for video traffic streams?
You are designing a high availability solution for Cisco Unity Connection. Which service must be running and correctly configured on both the primary and secondary servers to facilitate automatic failover?
You are designing a Cisco Unified Communications Manager (CUCM) cluster with geographically dispersed nodes. To ensure optimal voice quality and call signaling efficiency, which mechanism should you configure to prevent the transmission of unnecessary SIP signaling traffic over high-latency WAN links?
You are deploying a Cisco Expressway-E in a DMZ. Which port must be opened on the external firewall to allow for H.460.18/19 firewall traversal for H.323 endpoints?
You have a CUCM cluster with high utilization. Which parameter, when adjusted, helps mitigate the load on the TFTP service during a large-scale phone deployment?
When designing a Cisco Jabber deployment using MRA, which internal service is responsible for providing the configuration file and server list to the client?
You are implementing Quality of Service (QoS) for a Cisco IP Phone. Which mechanism ensures that the phone's traffic is tagged correctly even if the user connects a PC to the phone's auxiliary port?
You are troubleshooting a registration failure for a remote IP phone. The phone is configured to use an Expressway-E for MRA. Which DNS record is queried by the client to find the Expressway-E cluster?
You are deploying a CUBE (Cisco Unified Border Element) for SIP trunking. Which feature allows CUBE to hide the internal network topology from the service provider?
You are designing a Call Admission Control (CAC) policy for a site with limited bandwidth. Which feature should you use to prevent over-subscription of the WAN link?
You are designing a solution for a Cisco IP Phone that does not receive an IP address. Which DHCP feature must be enabled on the access switch to forward requests to the DHCP server?
When deploying a high-availability CUCM cluster, how many subscribers are recommended to be associated with a single publisher for optimal database performance?
When designing for emergency services (E911) in a multisite deployment, what is the best practice for ensuring calls are routed to the correct Public Safety Answering Point (PSAP)?
An administrator is configuring a new Cisco Unified Communications Manager (CUCM) cluster with a publisher and two subscribers. The publisher is running the Cisco CallManager service, and the subscribers are also running the Cisco CallManager service. The administrator wants to ensure that if a subscriber fails, the phones registered to it can re-register to another subscriber. Which configuration is required to achieve this?
You are designing a Cisco Collaboration solution for a company with 3,000 users across three buildings on a single campus. The customer wants to ensure that if the Cisco Unified Communications Manager (CUCM) publisher fails, the system continues to operate with minimal disruption and that administrative changes can still be made. Which deployment approach should you recommend?
A collaboration engineer is designing a centralized call-processing deployment where four branch offices connect to the data center over MPLS. Each branch has 40 G.711 phones, and the WAN links are 2 Mbps with 200 ms round-trip latency. The design must keep all call control in the data center while ensuring that branch phones can still place internal calls if the WAN fails. Which design element should be added to meet the requirement?
You are designing a Cisco Unified Communications Manager (CUCM) cluster for a large enterprise with 10,000 users. The customer requires high availability and disaster recovery. The primary data center is in New York, and a secondary data center is in Chicago. Which strategy should be used for the CUCM database replication and call processing redundancy?
A collaboration engineer is configuring a Cisco Unified Border Element (CUBE) to connect a CUCM cluster to an ITSP. The ITSP requires that all outbound calls use SIP over TLS with SRTP encryption. The engineer has configured a SIP trunk on CUCM pointing to CUBE. Which additional configuration is required on CUBE to meet the ITSP's requirement?
A network engineer is configuring a Cisco Unified Communications Manager (CUCM) cluster to support a new SIP trunk to an ITSP. The ITSP requires that all outbound calls present a specific number as the calling party number. Which CUCM configuration element should be used to manipulate the calling party number for calls routed over this SIP trunk?
A collaboration architect is designing a Cisco Unity Connection voicemail deployment integrated with CUCM using SIP. The design must support 5000 users with high availability and must allow voicemail port failover if a Unity Connection node fails. Which design approach should be used?
A collaboration engineer is designing a Cisco Unified Communications Manager (CUCM) cluster for a new deployment. The customer requires that the system support secure signaling and media encryption for all calls. Which two components must be configured to enable secure signaling and media encryption for SIP calls between CUCM and Cisco IP Phones? (Choose two.)
A collaboration engineer is troubleshooting a call routing issue in a Cisco Unified Communications Manager (CUCM) cluster. Users report that when they dial a specific long-distance number, they hear a fast busy tone. The engineer checks the dialed number analysis and sees that the call matches a route pattern that points to a SIP trunk to the PSTN. The SIP trunk is registered and operational. Which CUCM feature should the engineer check to determine why the call is failing?
You are deploying a Cisco Unified Border Element (CUBE) to connect a Cisco Unified Communications Manager (CUCM) cluster to a SIP trunk service provider. The provider requires that all outbound calls use a specific SIP header for billing and that early media (ringback) is passed correctly. During testing, you notice that calls fail when the provider sends a 183 Session Progress with SDP, and the caller does not hear ringback. Which CUBE configuration is most likely missing to allow early media and proper SIP header manipulation?
A network engineer is deploying Cisco Unified Border Element (CUBE) and must ensure that voice traffic is prioritized correctly across the enterprise network. Which command correctly maps the voice traffic DSCP value to the correct priority queue in a Cisco IOS-XE router?
In a Cisco collaboration design, you are tasked with identifying the DHCP Option required for Cisco IP Phones to discover the TFTP server address automatically. Which option is standard for this purpose?
You are verifying the network readiness for a Cisco TelePresence endpoint. Which tool would you use to measure the packet loss, latency, and jitter on the path to the CUCM cluster?
A collaboration designer must ensure that inter-cluster calls between two CUCM clusters remain secure. Which mechanism must be implemented to ensure media remains encrypted from end to end?
When designing for high availability of Cisco Unified Communications Manager (CUCM) services, which specific configuration ensures that a secondary node takes over call processing if the primary node fails?
You are designing a high-availability solution for Cisco Expressway. Which element is required to load-balance traffic between multiple Expressway nodes?
You are managing a Cisco Collaboration cluster and notice that database replication is stuck in a '3' (blocked) state. What is the standard troubleshooting step?
A company is deploying a centralized Cisco Unified Communications Manager (CUCM) cluster with a single publisher and two subscribers. The publisher is located in the data center, and the subscribers are in the same data center. Branch offices connect via a WAN. The design team wants to ensure that IP phones at the branches can register and make calls even if the WAN link fails. Which CUCM feature should be implemented to achieve this?
A collaboration engineer is designing a Cisco Unified Communications Manager (CUCM) cluster for a company with 5000 users. The cluster will have one publisher and three subscribers. The engineer must ensure that the design supports high availability and that IP phones can register and make calls even if one subscriber fails. Which two statements are true regarding CUCM redundancy and device registration? (Choose two.)
A collaboration engineer is preparing a Cisco Unified Communications Manager cluster for a new site that requires the Cisco 8845 IP Phone to operate in a secure environment. The security team mandates that all signaling and media between the phone and CUCM be encrypted, and that the phone authenticate to CUCM using a locally significant certificate (LSC). Which action must the engineer take first to ensure the phone can obtain an LSC and register securely?
A network designer is planning a centralized call processing deployment with 20 remote sites. Each site has 50 IP phones and uses G.711 for internal calls. The designer must ensure that calls between sites use G.729 to conserve WAN bandwidth, but calls within a site use G.711. Which CUCM configuration element should be used to achieve this?
A company is deploying Cisco Unified Communications Manager in a centralized call processing model with remote branches connected via a WAN. The network team wants to ensure that if the WAN link fails, IP phones at the branch can still make calls to the PSTN. Which solution should be implemented at the branch?
A collaboration engineer is designing a CUCM cluster with two nodes: a publisher and a subscriber. The engineer must ensure that the cluster can support 2500 IP phones and that call processing continues if the publisher fails. Which statement accurately describes the design requirement?
A company's main site runs a Cisco Unified Communications Manager (CUCM) cluster. They are adding a new remote branch that will have 50 IP phones. The branch has limited bandwidth and must survive a WAN outage with basic call functionality between local phones. Which design approach should be used at the branch?
You are designing Quality of Service (QoS) for a Cisco Collaboration deployment. The customer wants to ensure that voice traffic is prioritized over data traffic. Which marking should be applied to voice bearer traffic on Cisco IP Phones and switches?
A collaboration administrator is deploying a new Cisco Unified Communications Manager (CUCM) cluster and needs to ensure that the publisher database is protected against corruption. The administrator plans to use the Disaster Recovery System (DRS) for backups. Which statement accurately describes a DRS backup requirement?
You are designing a Cisco Unified Communications Manager (CUCM) dial plan for a multinational company. The company has offices in North America, Europe, and Asia. Each region has its own PSTN gateway and dial plan requirements. The customer wants to minimize dial plan complexity and ensure that users can dial local numbers as they are accustomed to. Which approach should you recommend?
You are designing a Cisco Collaboration deployment for a hospital where 911 calls must always be routed to the nearest Public Safety Answering Point (PSAP) based on the physical location of the calling device. The hospital has multiple buildings across a campus, and wireless IP phones (Cisco 8821) are used by nurses who roam between buildings. Which CUCM feature should you implement to ensure that emergency calls are routed with the correct location information?
A network engineer is deploying a Cisco Unified Border Element (CUBE) for a SIP trunk to an ITSP. The ITSP requires that all outbound calls present a specific calling number and that the SIP From header contain the same number. The engineer must ensure that the calling number is manipulated correctly on the outbound dial peer. Which CUBE configuration command should be used to modify the calling number in both the From header and the P-Asserted-Identity header?
A collaboration engineer is designing a SIP trunk between Cisco Unified Communications Manager (CUCM) and Cisco Unified Border Element (CUBE). The engineer must ensure that calls are routed correctly and that CUCM can send calls to CUBE. Which element should be configured on CUCM to point to CUBE as the next hop for calls destined to the ITSP?