You are configuring a Media Resource Group List (MRGL) in CUCM to allow for transcoding. A call is placed between two endpoints where one supports G.711 and the other only supports G.729. If the MRGL contains a Transcoder, what must be configured to ensure the call succeeds?
You are configuring a Cisco IOS router to perform QoS marking for voice traffic originating from a local PBX. You need to ensure that the voice traffic is marked as DSCP EF. Which configuration command correctly applies this in a policy-map?
You are troubleshooting a scenario where video quality is degrading during periods of high data utilization. You identify that video traffic is being dropped in the network. What is the most likely cause if you are using CBWFQ?
You are configuring a Cisco gateway to handle voice traffic. You need to ensure that the gateway trusts DSCP markings from the incoming IP phone. Which command is used on the interface?
A collaboration engineer is configuring a Cisco IOS XE router to mark voice and video traffic at the network edge. The router connects to a service provider that trusts DSCP markings. The engineer must ensure that voice bearer traffic is marked EF, call signaling is marked CS3, and video conferencing traffic is marked AF41. Which two configurations are required to accomplish this marking on the router? (Choose two.)
A network administrator is configuring a Cisco IOS router to support a SIP trunk to a Cisco Unified Communications Manager. The administrator wants to ensure that voice signaling traffic is marked with the correct DSCP value. Which DSCP value is recommended for call signaling traffic in a Cisco collaboration network?
A network engineer is deploying a new branch with a Cisco IOS XE router acting as the WAN edge. The service provider marks all traffic with DSCP 0 (Best Effort), so the engineer must remark voice RTP flows entering the LAN-side interface before they are queued on the WAN interface. The engineer wants to identify voice bearer traffic by its DSCP value rather than by ACL. Which class-map match statement accomplishes this on the ingress interface?
A collaboration engineer is troubleshooting poor voice quality on a Cisco IP Phone. The network uses a Cisco Catalyst switch with QoS enabled. The engineer suspects that the phone's voice traffic is not being marked correctly. Which command on the switch can verify the DSCP value of voice packets received from the phone?
A collaboration engineer is deploying a new branch office with a Cisco Catalyst switch and a Cisco IOS router. The engineer wants to ensure that voice traffic is prioritized over data traffic during periods of congestion. The router's WAN interface is experiencing congestion, and the engineer has configured a low-latency queue (LLQ) for voice. However, voice quality is still poor. Which additional QoS mechanism should be configured on the router to prevent data traffic from starving the voice queue?
A collaboration engineer is deploying a Cisco Expressway pair for Mobile and Remote Access. Remote endpoints register through the Expressway-E in the DMZ, and media traverses the Expressway-C and Expressway-E. The engineer must ensure that the media path between the two Expressway servers uses a single, predictable transport and that firewalls can be configured with a narrow rule set. Which transport should be used for the traversal zone media between Expressway-C and Expressway-E?
A collaboration engineer is configuring a Cisco IOS XE WAN edge router to support a site with both voice and video endpoints. The carrier provides a 50-Mbps WAN circuit and has agreed to honor DSCP markings. The engineer must ensure that during congestion, video conferencing traffic receives at least 20% of the link bandwidth while still allowing for burst up to 15 Mbps. Which QoS mechanism best meets these requirements?
A network engineer is deploying a new branch office with a Cisco IOS XE router. The WAN provider does not honor DSCP markings, so the engineer must re-mark all inbound traffic at the WAN edge. The provider offers a single class of service and marks all traffic with DSCP 0. The engineer needs to ensure that voice signaling (SCCP) is marked as CS3 and voice media (RTP) is marked as EF. Which QoS configuration on the router achieves this?
A network administrator is deploying QoS for a Cisco Collaboration solution across a WAN. The administrator needs to ensure that voice signaling traffic (SIP) is marked with the appropriate DSCP value. According to Cisco best practices, which DSCP value should be used for voice signaling?
A collaboration engineer is troubleshooting poor voice quality on a Cisco Collaboration deployment. The engineer suspects that the QoS configuration on the WAN router is not correctly prioritizing voice traffic. Which two actions should the engineer take to verify that voice traffic is being marked and queued correctly? (Choose two.)
You are implementing a QoS policy on a WAN edge router. You have a requirement to prioritize video traffic. Which queueing mechanism is recommended by Cisco to minimize jitter and latency for video streams?
A network administrator is troubleshooting one-way audio issues between a Cisco IP Phone and a Cisco TelePresence endpoint. The path traverses a router with a configured class-map. Which command would you use to verify the packet markings on the ingress interface?
You are configuring QoS for a Cisco Unified Communications Manager (CUCM) deployment. You need to ensure that audio media traffic between endpoints is marked correctly. Which DSCP value should be assigned to RTP audio traffic according to the Cisco SRND best practices?
In a multi-site deployment, you have a requirement to transcode between G.711 and G.729. If the transcoder resources are exhausted, what is the expected outcome for a new call requiring this conversion?
A network engineer is deploying a new branch office with a Cisco IOS XE gateway that connects to the service provider via a 100-Mbps Ethernet WAN link. The engineer needs to ensure that interactive voice traffic always receives priority treatment during congestion, while preventing non-real-time traffic from being starved. Which QoS mechanism should be configured on the WAN interface to guarantee strict priority for voice while still servicing other queues?
A network engineer is configuring LLQ on a Cisco IOS router to protect voice traffic. The voice class is assigned a priority of 512 kbps. During periods of congestion, which mechanism ensures that voice packets are not delayed by lower-priority traffic?
A collaboration engineer is deploying a new branch office with Cisco Unified Communications Manager and wants to ensure that voice traffic is marked with the appropriate DSCP value. The service provider requires that voice bearer traffic use EF ( Expedited Forwarding). Which DSCP value should be configured on the IP phones for voice media?
A network administrator is troubleshooting poor voice quality on a Cisco Unified Communications Manager cluster. The administrator suspects that the issue is related to the Differentiated Services Code Point (DSCP) value being used for voice bearer traffic. Which DSCP value is recommended by Cisco for voice bearer traffic to ensure it receives priority treatment in the network?
A collaboration engineer is deploying a new branch where WAN congestion causes jitter on voice calls. The carrier marks all traffic with DSCP 0 on ingress. The engineer wants the branch Cisco IOS router to reclassify voice bearer traffic into the EF class and apply priority queueing before the traffic enters the MPLS WAN. Which configuration approach accomplishes this goal?
A network engineer is configuring a Cisco IOS router to mark voice bearer traffic with the DSCP value EF (46) and call signaling traffic with CS3 (24). The engineer wants to ensure that both marking operations are applied in a single policy-map on the ingress interface. Which configuration element is required to differentiate the two traffic classes before marking?
A Cisco IOS gateway is connected to a WAN circuit where the physical line rate is 10 Mbps but the contracted CIR is only 4 Mbps. Voice quality suffers during bursts because the provider polices traffic above the CIR and drops excess packets. The engineer wants the gateway to smooth outbound traffic so the provider does not discard bursts. Which configuration element should be applied to the WAN interface?
A collaboration administrator is configuring a new site in Cisco Unified Communications Manager. The site has a 2 Mbps WAN link, and the administrator wants to prevent more concurrent G.711 calls than the link can support by defining the maximum audio bandwidth allowed. Which configuration element in Cisco Unified Communications Manager should the administrator configure?
An administrator is designing a hub-and-spoke collaboration deployment. The hub has a 100 Mbps WAN link shared by many branches, and the engineer needs to ensure that a single branch cannot consume more than its fair share of bandwidth during peak periods. The engineer also wants voice calls to remain prioritized. Which QoS mechanism should be configured on the hub router to achieve both goals?
An engineer is troubleshooting one-way audio for calls traversing a Cisco IOS XE router with NAT between an internal CUCM cluster and an external SIP provider. Signaling completes, but RTP from the provider never reaches the internal phone. The engineer confirms the provider is sending media to the signaling address. Which technology should be enabled on the router to allow the correct media address to be signaled to the provider?
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.)
A network engineer is configuring a Cisco IOS router to classify traffic for a QoS policy. The engineer needs to identify packets based on the DSCP value EF that has already been marked by an upstream IP phone. Which configuration element should be used to match this traffic?
A collaboration engineer is designing QoS for a Cisco Collaboration deployment where IP phones connect to Cisco Catalyst switches and the WAN edge is a Cisco IOS XE router. The engineer wants to ensure that voice bearer traffic is properly marked and prioritized end to end. Which two actions should the engineer take to establish a consistent QoS trust boundary? (Choose two.)
A collaboration engineer is troubleshooting poor video quality on a Cisco Collaboration deployment. The engineer suspects that video traffic is not receiving appropriate QoS treatment and wants to verify the classification and marking on a Cisco IOS router. Which two actions should the engineer take to confirm that video traffic is being handled correctly? (Choose two.)
A network administrator is configuring QoS on a Cisco IOS router for a collaboration deployment. The administrator needs to ensure that voice control traffic, such as H.225 and H.245 signaling, is marked with the appropriate DSCP value. According to Cisco best practices, which DSCP value should be used for call signaling traffic?
A collaboration engineer is deploying a new Cisco Webex Room Kit in a conference room. The endpoint will send 1080p video at 3 Mbps. The network administrator needs to ensure that the video traffic is marked with the appropriate DSCP value and receives proper treatment in the QoS policy. Which DSCP value should be used for this interactive video traffic?
A network engineer is configuring a QoS policy on a Cisco IOS XE router for a collaboration deployment. The engineer needs to ensure that voice traffic is placed in a low-latency queue and that the queue has a strict priority, but also wants to limit voice traffic to 1 Mbps to prevent starvation of other traffic. Which queuing mechanism should be used?