What is one of the reasons that custom QoS ACLs are recommended over automatic QoS when configuring ports on a Catalyst 6500 for use with IP phones？（）A、 79xx IP phones do not automatically mark voice packets with non-zero DSCP values.B、 79xx IP phones do not mark protocol packets such as DHCP， DNS， or TFTP with non-zero DSCP values.C、 79xx IP phones do not mark voice packets with optimal DSCP values.D、 79xx IP phones use a custom protocol to communicate CDP information to the switch.
What is one of the reasons that custom QoS ACLs are recommended over automatic QoS when configuring ports on a Catalyst 6500 for use with IP phones？（）
- A、 79xx IP phones do not automatically mark voice packets with non-zero DSCP values.
- B、 79xx IP phones do not mark protocol packets such as DHCP， DNS， or TFTP with non-zero DSCP values.
- C、 79xx IP phones do not mark voice packets with optimal DSCP values.
- D、 79xx IP phones use a custom protocol to communicate CDP information to the switch.
相关考题：
What is one of the reasons that custom QoS ACLs are recommended over automatic QoS when configuring ports on a Catalyst 6500 for use with IP phones?() A. 79xx IP phones do not automatically mark voice packets with non-zero DSCP values.B. 79xx IP phones do not mark protocol packets such as DHCP, DNS, or TFTP with non-zero DSCP values.C. 79xx IP phones do not mark voice packets with optimal DSCP values.D. 79xx IP phones use a custom protocol to communicate CDP information to the switch.
Which two VoIP capabilities are utilized when the CallManager and the gateway are configured for Survivable Remote Site Telephony？（）A、 Analog phones， connected to the PSTN， act as internal call agents if IP communication to the CallManager is lost.B、 An onsite gateway reroutes calls over the PSTN if IP communication to the CallManager is lost.C、 The IP phones can reroute calls over the PSTN if IP communication to the CallManager is lost.D、 Local voice gateways can assume the function of a call agent if IP communication to the CallManager is lost.E、 IP phones use an internal call agent if IP communication to the CallManager is lost.
Which two statements are true about voice ports on a router？ （）A、 Calls to the PSTN can be made via the use of FXO or T1/E1 trunk ports.B、 Calls to the PSTN can be made via FXS or T1/E1 trunk ports.C、 Analog and IP phones can be connected to the VoIP network via FXO or T1/E1 trunk ports.D、 Calls between analog phones that are attached to the FXS ports in a VoIP network can be completely processed by voice-enabled routers.
You are a network administrator of a large investor relations company that uses a switchednetwork to carry both data and IP telephony services. Why should you carry voice traffic on aseparate VLAN？（）A、IP phones require inline power and must be in separate VLAN to receive inline powerB、IP telephony applications require prioritization over other traffic as they are more delaysensitiveC、IP phones can only receive IP addresses through DHCP if they are in separate VLAND、The CDP frames from the IP phone can only be recognized by the switch if the phone is in anauxiliary vlan
What formula do you use to calculate the number of Voice Gateway ports? （）A、Erlang A B、Erlang B C、Erlang C D、IVR ports + agent phones
What does the mac packet-classify command do when applied to an interface configuration？（）A、 It enables MAC ACLs to be applied to only IP packets that enter the interface.B、 It enables MAC ACLs to be applied to only non-IP packets that enter the interface.C、 It enables MAC ACLs to be applied to all packets that enter the interface.D、 It enables MAC ACLs to be used for QoS settings.
When configuring a WLAN controller for a voice application using Cisco 7920 wireless IP phones. Whichtwo general control settings should you select？（）A、Multicast onB、Aggressive Load Balancing offC、Multicast offD、AP Fallback onE、Aggressive Load Balancing on
Users report an intermittent degradation of sound on their IP phones. Which of the following woulda network administrator do to alleviate the problem?（）A、Use plenum cablesB、Provide fault tolerance for the switchC、Configure VLAN trunking on the switchD、Configure QoS
By default， on the WLAN controller for a voice application using Cisco 7921 wireless IP phones， what is thepercentage of RF bandwidth that can be dedicated to the phones？（）A、55 percentB、56 percentC、75 percentD、85 percent
When configuring a wlan controller for a voice application using cisco 7920 wireless ip phones. which two general control settings should you select？（）A、multicast onB、aggressive load balancing offC、multicast offD、ap fallback onE、aggressive load balancing onF、ap fallback off
When configuring a WLAN controller for a voice application using Cisco 7920 wireless IP phones，which two general control settings should you select？（）A、Aggressive Load Balancing onB、Aggressive Load Balancing offC、Multicast onD、Multicast offE、AP Fallback onF、AP Fallback off
By default，on the wlan controller for a voice application using cisco 7921 wireless ip phones. what is the percentage of rf bandwidth that can be dedicated to the phones？（）A、75 percentB、85 percentC、56 percentD、55 percent
When configuring a WLAN controller for a voice application using Cisco 7920 wireless IP phones，which two general control settings should you select？（）A、Multicast onB、Aggressive Load Balancing offC、 Multicast offD、AP Fallback onE、Aggressive Load Balancing onF、AP Fallback off
You are the network administrator of an enterprise company that just deployed a global IP telephony environment. In order to guarantee good voice quality， you asked your provider to implement QoS on the CE routers of your MPLS network. On your LAN， you have also deployed QoS. Users， however， keep complaining about bad voice quality， and the provider does not see matches on the DSCP values that you have asked him to match upon. What is most likely the problem？（）A、The phones are not sending traffic with the correct DSCP value.B、The Cisco CallManager is not marking the traffic correctly.C、This is most likely a bug on the CE routers.D、Your LAN QoS is incorrectly configured.
A branch office of Acme Insurance has 15 IP phones connected to the main office using the distributed call processing model. Normally， the phones work with great quality. However， during very busy times when all of the agents are on the phone at the same time， the voice quality drops precipitously. Words or phrases or both are dropped from conversations. What is the most likely cause of the problem？（）A、large files are being downloaded over the WAN networkB、IP phone traffic is not being classified correctlyC、more bandwidth is required for the office LAND、Call Admission Control has not been implemented E、employees are watching videos over the internetF、header compression is not being used
A network administrator has been receiving work orders about poor voice quality crossing a branch T1. The cause is determined to be users running high bandwidth file sharing applications across the T1 sending large packets delaying the smaller voice streams. Which of the following would improve voice quality?（）A、Configure traffic shaping to reduce the bandwidth available to the file sharing application.B、Configure a separate VLAN for the IP phones.C、Install a content caching proxy at the branch to reduce inbound WAN traffic.D、Upgrade switches to provide higher bandwidth ports for workstations and IP phones.
单选题By default， on the WLAN controller for a voice application using Cisco 7921 wireless IP phones， what is thepercentage of RF bandwidth that can be dedicated to the phones？（）A55 percentB56 percentC75 percentD85 percent
单选题What is one of the reasons that custom QoS ACLs are recommended over automatic QoS when configuring ports on a Catalyst 6500 for use with IP phones？（）A 79xx IP phones do not automatically mark voice packets with non-zero DSCP values.B 79xx IP phones do not mark protocol packets such as DHCP， DNS， or TFTP with non-zero DSCP values.C 79xx IP phones do not mark voice packets with optimal DSCP values.D 79xx IP phones use a custom protocol to communicate CDP information to the switch.
多选题Which two VoIP capabilities are utilized when the CallManager and the gateway are configured for Survivable Remote Site Telephony？（）AAnalog phones， connected to the PSTN， act as internal call agents if IP communication to the CallManager is lost.BAn onsite gateway reroutes calls over the PSTN if IP communication to the CallManager is lost.CThe IP phones can reroute calls over the PSTN if IP communication to the CallManager is lost.DLocal voice gateways can assume the function of a call agent if IP communication to the CallManager is lost.EIP phones use an internal call agent if IP communication to the CallManager is lost.
单选题What does the mac packet-classify command do when applied to an interface configuration？（）A It enables MAC ACLs to be applied to only IP packets that enter the interface.B It enables MAC ACLs to be applied to only non-IP packets that enter the interface.C It enables MAC ACLs to be applied to all packets that enter the interface.D It enables MAC ACLs to be used for QoS settings.
单选题By default，on the wlan controller for a voice application using cisco 7921 wireless ip phones. what is the percentage of rf bandwidth that can be dedicated to the phones？（）A75 percentB85 percentC56 percentD55 percent
多选题When configuring a wlan controller for a voice application using cisco 7920 wireless ip phones. which two general control settings should you select？（）Amulticast onBaggressive load balancing offCmulticast offDap fallback onEaggressive load balancing onFap fallback off
多选题When configuring a WLAN controller for a voice application using Cisco 7920 wireless IP phones，which two general control settings should you select？（）AAggressive Load Balancing onBAggressive Load Balancing offCMulticast onDMulticast offEAP Fallback onFAP Fallback off
多选题When configuring a WLAN controller for a voice application using Cisco 7920 wireless IP phones. Whichtwo general control settings should you select？（）AMulticast onBAggressive Load Balancing offCMulticast offDAP Fallback onEAggressive Load Balancing on
多选题Authentication for user data traffic is important, but so is authentication for IP voice traffic. The Cisco 830 802.1 feature provides an easier method for allowing IP voice traffic through the VPN, because it（）.Arequires access lists to identify the voice trafficBcan allow traffic from a device without 802.1X authentication, by MAC addressCcan allow traffic from Cisco IP phones by listening to their CDP advertisementsDallows all packets marked with a ToS of 5 to bypass authenticationEallows all IP voice packets to bypass authentication via stateful inspection
单选题Users report an intermittent degradation of sound on their IP phones. Which of the following woulda network administrator do to alleviate the problem?（）AUse plenum cablesBProvide fault tolerance for the switchCConfigure VLAN trunking on the switchDConfigure QoS
单选题What is one of the reasons that custom QoS ACLs are recommended over automatic QoS when configuring ports on a Catalyst 6500 for use with IP phones?（）A79xx IP phones do not automatically mark voice packets with non-zero DSCP values.B79xx IP phones do not mark protocol packets such as DHCP, DNS, or TFTP with non-zero DSCP values.C79xx IP phones do not mark voice packets with optimal DSCP values.D79xx IP phones use a custom protocol to communicate CDP information to the switch.