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What can be used to maintain the voice quality on a link by limiting the number of calls that can be active at any given time？（）
- A、 Call Management Link Agent
- B、 Traffic policing
- C、 Call Admission Control
- D、 QoS Link Congestion Management
- E、 Oversubscription Link Detection
参考答案
更多 “What can be used to maintain the voice quality on a link by limiting the number of calls that can be active at any given time？（）A、 Call Management Link AgentB、 Traffic policingC、 Call Admission ControlD、 QoS Link Congestion ManagementE、 Oversubscription Link Detection” 相关考题
考题
How can Cisco NetFlow be used to aid in the operation and troubleshooting of QoS issues? ()
A. NetFlow can report on the number of traffic matches for each class map in a configured QoS policy configuration.B. NetFlow records can be used to understand traffic profiles per class of service for data, voice, and video traffic.C. NetFlow can discover the protocols in use and automatically adjust QoS traffic classes to meet policy-map requirements.D. NetFlow can be configured to identify voice and video traffic flows and place them into a lowlatency queue for expedited processing.
考题
To ensure voice packets are kept within the Committed Information Rate (CIR) of a Frame Relay link, what should be used in the CPE?()
A. prioritizationB. classificationC. fragmentationD. traffic shaping
考题
When designing a converged network, which measures can be taken at the building access layer to help eliminate latency and ensure end－to－end quality of service can be maintained? ()
A. rate limit voice trafficB. configure spanning-tree for fast link convergenceC. isolate voice traffic on separate VLANsD. classify and mark traffic close to the source
考题
What type of Call Admission control in CallManager allows for limits to the bandwidth consumed by active calls？（）A、 regionsB、 partitionsC、 locationsD、 device Pools
考题
The Acme company has determined that during its busiest hours， the average number of internal VoIP calls across the WAN link is four （4）. Since this is an average， the WAN link has been sized for six （6） calls with no call admission control. What will happen when a seventh call is attempted across the WAN link？ （）A、the seventh call is routed via the PSTNB、the call is denied and the original six （6） calls remainC、the call is completed and the first call is droppedD、the call is completed， but all calls have quality issuesE、the call is completed but the seventh call has quality issues
考题
Which statement is true about the Call Admission Control （CAC） feature in VoIP networks？（）A、 CAC is used to allocate enough bandwidth for the number of calls that are allowed on the VoIP network.B、 CAC is used to protect the quality of the voice calls by preventing call establishment if enough resources are not available on the network.C、 CAC provides queuing mechanisms for voice calls if the packets exceed the configured or budgeted rate.D、 In a VoIP network the CAC can be replaced with the LLQ QoS mechanism if it has been properly implemented.
考题
An OSPF link can be in multiple states at any given moment （ie. Exstart， exchange， full）. Whichtwo IOS commands let you view the state of the link？（）A、show ip ospfB、show ip protocolsC、show ip ospf neighborD、show ip ospf interface
考题
Virtual PortChannels （vPCs） allow links that are physically connected to two different Cisco switches to appear to a third downstream device as coming from a single device and as part of a single port channel. Which of the following are components of a Virtual PortChannel system？ （）A、 Two peer devices： the vPC peers of which one is primary and one is secondary and are part of a vPC domain.B、 A Layer 3 Gigabit Ethernet link called peer-keepalive link to resolve dual-active scenariosC、 A redundant 10 Gigabit Ethernet PortChannel called a peer link to carry traffic from one system to the other when neededD、 vPC member ports forming the PortChannelE、 A dot1q trunk between the vPC peersF、 A management port that can be used as peer-keepalive link to resolve dual-active scenarios.
考题
The Cisco SDM will create a QoS policy that provides services to two types of traffic. Which two statements indicate the default QoS parameters that are created by SDM？（）A、 Business-critical traffic will be sorted into two QoS classes.B、 Real-time traffic will be sorted into one QoS class.C、 Voice traffic will be considered real-time traffic while call signaling will be considered business-critical.D、 All traffic except real-time will be considered best-effort.E、 Routing， management， and transactional traffic will be considered business-critical.F、 Voice and call signaling traffic will be considered real-time.
考题
To ensure voice packets are kept within the Committed Information Rate (CIR) of a Frame Relay link, what should be used in the CPE?（）A、prioritizationB、classificationC、fragmentationD、traffic shaping
考题
What are three factors used to determine the amount of bandwidth that is required for a single VoIP call？（）A、codecB、link speedC、Layer 2 encapsulationD、packet overhead （IP/UDP/RTP）E、link delayF、total number of simultaneous calls that are allowed
考题
Which statement is true about IP telephony calls？（）A、 A Voice over IP （VoIP） packet consists of the voice payload， IP header， TCP header， RTP header， and Layer 2 link header.B、 The voice carrier stream uses H323 to set up， maintain， and tear down call endpoints.C、 Call control signaling uses Real-Time Transport Protocol （RTP） packets that contain actual voice samples.D、 The sum of bandwidth necessary for each major application， including voice， video， and data， should not exceed 75 percent of the total available bandwidth for each link.
考题
What is the Cisco recommended setting for the Cisco Unified Wireless Network WLC Voice Call Admission Control Max RF Bandwidth to support the Cisco Unified Wireless IP Phone 7921G?（）A、nominally 30 percent to best align with Cisco Unified Communications System recommendationsB、100 percent to ensure that the VoWLAN calls can use all the available bandwidth, if neededC、system default of 75 percentD、40 to 60 percentE、voice CAC should be left disabled unless wired QoS is configured
考题
What is the primary benefit of Single Number Reach？（）A、 Employees can receive calls at their desk and cell phone simultaneously.B、 Customers can call one number to reach all employees.C、 Employees can have their calls forwarded to the receptionist.D、 Customers can call any office number and the receptionist receives the call.
考题
A branch router is configured with an egress QoS policy that was designed for a total number of 10 concurrent VOIP calls.Due to expansion， 15 VOIP calls are now running over the link， but after the 14th call was established， allcalls were affected and the voice quality was dramatically degraded.Assuming that there is enough bandwidth on the link for all of this traffic， which part of the QoS configuration should be updated due to the new traffic profile？（）A、Increase the shaping rate for the priority queue.B、Remove the policer applied on the priority queue.C、Remove the shaper applied on the priority queue.D、Increase the policing rate for the priority queue.
考题
Which of the following events can NOT be tuned via router configuration to provide for faster convergencefollowing a link failure？（）A、Failure detectionB、Failure reportingC、IGP LSP/LSA originatioD、Per-hop flooding time of new link stateE、Number of hops that need to be notified of new link state
考题
A branch router is configured with an egress QoS policy that was designed for a total number of 10 concurrent VOIP Calls. Due to Expansion， 15 VOIP Calls are now running over the link， but after the 14th call was established， all calls were affected and the voice quality was dramatically degraded. Assuming that there is enough bandwidth on the link for all of this traffic， which part of the QOS configuration should be updated due to the new traffic profile？（）A、Increase the shaping rate for the priority queue.B、Remove the policer applied on the priority queue.C、Remove the shaper applied on the preiority queue.D、Increase the policing rate for the priority queue.
考题
What are two components of the QoS Integrated Services （IntServ） model？（）A、 link efficiencyB、 admission controlC、 classification and markingD、 shaping and policingE、 congestion avoidance using the RTP protocolF、 resource reservation using the RSVP protocol
考题
When designing a converged network， which measures can be taken at the building access layerto help eliminate latency and ensure end-to-end quality of service can be maintained？（）A、 rate limit voice trafficB、 configure spanning-tree for fast link convergenceC、 isolate voice traffic on separate VLANsD、 classify and mark traffic close to the source
考题
Voice quality is bad due to high delay and jitter on a link. Which two actions will improve the quality of voice calls？（）A、Increase the queue size of the voice class.B、Guarantee bandwidth during congestion to the voice class with a bandwidth command.C、Increase the tx-ring of the egress interface.D、Implement LLQ for the voice class.E、Decrease the rx-ring of the egress interface.F、Decrease the queue size of the voice class.
考题
Which three functions can an Integrated Services Router perform in a VoIP network？（）A、 voice stream mixing for conference callingB、 voice gatewayC、 call admission controlD、 analog or digital phone interfacesE、 XML application servicesF、 large scale dial plan application
考题
Which two statements are true about the function of CAC？（）A、CAC provides guaranteed voice quality on a link.B、CAC artificially limits the number of concurrent voice calls.C、CAC is used to control the amount of bandwidth that is taken by a call on a link.D、CAC prevents oversubscription of WAN resources that is caused by too much voice traffic.E、CAC allows an unlimited number of voice calls while severely restricting，if necessary，other forms of traffic.F、CAC solves voice congestion problems by using QoS to give priority to UDP traffic.
考题
多选题Voice quality is bad due to high delay and jitter on a link. Which two actions will improve the quality of voice calls？（）AIncrease the queue size of the voice class.BGuarantee bandwidth during congestion to the voice class with a bandwidth command.CIncrease the tx-ring of the egress interface.DImplement LLQ for the voice class.EDecrease the rx-ring of the egress interface.FDecrease the queue size of the voice class.
考题
单选题The Acme company has determined that during its busiest hours， the average number of internal VoIP calls across the WAN link is four （4）. Since this is an average， the WAN link has been sized for six （6） calls with no call admission control. What will happen when a seventh call is attempted across the WAN link？ （）A
the seventh call is routed via the PSTNB
the call is denied and the original six （6） calls remainC
the call is completed and the first call is droppedD
the call is completed， but all calls have quality issuesE
the call is completed but the seventh call has quality issues
考题
多选题Which two statements are true about the function of CAC？ （）ACAC provides guaranteed voice quality on a link.BCAC artificially limits the number of concurrent voice calls.CCAC is used to control the amount of bandwidth that is taken by a call on a link.DCAC prevents oversubscription of WAN resources that is caused by too much voice traffic.ECAC allows an unlimited number of voice calls while severely restricting， if necessary， other forms of traffic.FCAC solves voice congestion problems by using QoS to give priority to UDP traffic.
考题
单选题What can be used to maintain the voice quality on a link by limiting the number of calls that can be active at any given time？（）A
Call Management Link AgentB
Traffic policingC
Call Admission ControlD
QoS Link Congestion ManagementE
Oversubscription Link Detection
考题
单选题What is the primary benefit of Single Number Reach？（）A
Employees can receive calls at their desk and cell phone simultaneously.B
Customers can call one number to reach all employees.C
Employees can have their calls forwarded to the receptionist.D
Customers can call any office number and the receptionist receives the call.
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