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

题目
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.

相似考题

1.Click the Exhibit button.When configuring WXC A‘s local WAN parameters, which QoS network parameter would you choose?()A. over-subscribedB. under-subscribedC. dedicated circuitsD. nondedicated circuits

2.What field in IP packet is used for classification by QOS？

3.What does qos pre-classify provides inregardto implementing QoS over GRE/IPSec VPN tunnels？（）A、 enables IOS to copy the ToS field from the inner （original） IPheader to theouter tunnel IP headerB、 enables IOS to make a copy of the inner （original） IP header and to run a QoS classification before encryption， based on fields in the inner IP header.C、 enables IOS to classify packets based on the ToS field in the inner （original） IP headerD、 enables IOS to classify packets based on the ToS field in the outer tunnel IP headerE、 enables the IOS classification engine to only see a single encrypted and tunneledflow to reduce classification complexity

4.Choose the true statement regarding QoS pre-classify.（）A、QoS pre-classify permits making QoS decisions based on elements from the unencrypted IP packet.B、QoS pre-classify is required when encrypting voice.C、QoS pre-classify is an advantage to Service Providers transporting encrypted packets.D、QoS pre-classify is not designed for IPSec/GRE configurations.

更多“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?() ”相关问题

  • 第1题：

    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.

    正确答案:B,D

  • 第2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.

    正确答案:C

  • 第3题：

    Cisco AutoQoS takes the interface type and bandwidth into consideration when configuring which three QoS features？（）

    • A、voice compression methodology
    • B、LLQ
    • C、CRTP
    • D、routing protocol
    • E、LFI
    • F、trust boundary

    正确答案:B,C,E

  • 第4题：

    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 cables
    • B、Provide fault tolerance for the switch
    • C、Configure VLAN trunking on the switch
    • D、Configure QoS

    正确答案:D

  • 第5题：

    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 on
    • B、Aggressive Load Balancing off
    • C、 Multicast off
    • D、AP Fallback on
    • E、Aggressive Load Balancing on
    • F、AP Fallback off

    正确答案:B,C

  • 第6题：

    Which two statements about the QoS functionality of the Cisco SDM are true？（）

    • A、the first step when using the SDM QoS wizard is to select the inbound interface on which the QoS policy must be applied
    • B、the SDM QoS wizard can be used to optimize LAN， WAN， and VPN interfaces
    • C、he SDM QoS wizard supports network-based application recognition （NBAR） to provide deep and stateful packet inspection
    • D、he SDM QoS wizard will apply custom queuing and priority queuing policies to the identified interfaces
    • E、he SDM QoS wizard will apply low latency-queuing，custom-queuing and priority-queuing policies to the identified interfaces
    • F、to create and manage the QoS settings， the user must select the QoS wizard task under the Monitor option

    正确答案:B,C

  • 第7题：

    What accurately describes the usage of a Cisco AutoQoS command？（）

    • A、on Catalyst switches， the show auto discovery qos command is used to display the data collected during the Auto-Discovery phase
    • B、on Catalyst switches， the show auto qos command is used to display packet statistics of all classes that are configured for all service policies
    • C、on Cisco routers， the show mls qos maps command is used to verify the CoS-to-DSCP maps for egress packet queuing
    • D、on Cisco routers， the show auto qos command is used to display the AutoQoS interface templates， policy maps， class maps， and ACLs

    正确答案:D

  • 第8题：

    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.


    正确答案： B
    解析： 暂无解析

  • 第9题：

    多选题
    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.


    正确答案： A,E
    解析： 暂无解析

  • 第10题：

    单选题
    What does qos pre-classify provides inregardto implementing QoS over GRE/IPSec VPN tunnels？（）
    A

     enables IOS to copy the ToS field from the inner （original） IPheader to theouter tunnel IP header

    B

     enables IOS to make a copy of the inner （original） IP header and to run a QoS classification before encryption， based on fields in the inner IP header.

    C

     enables IOS to classify packets based on the ToS field in the inner （original） IP header

    D

     enables IOS to classify packets based on the ToS field in the outer tunnel IP header

    E

     enables the IOS classification engine to only see a single encrypted and tunneledflow to reduce classification complexity


    正确答案： D
    解析： 暂无解析

  • 第11题：

    多选题
    Which three characteristics of the traffic flow are taken into consideration when the QoS-for-VPNs feature （QoS pre-classify） provides packet classification and applies appropriate QoS service on tunnel interfaces？（）
    A

    IP precedence bits

    B

    DSCP bits

    C

    original port numbers

    D

    DE bits

    E

    source IP address

    F

    destination IP address


    正确答案： B,A
    解析： 暂无解析

  • 第12题：

    问答题
    What field in IP packet is used for classification by QOS？

    正确答案： TOS byte.
    解析： 暂无解析

  • 第13题：

    When configuring a wireless LAN controller for QoS， what 802.1p tag should be applied for video applications？ （）

    • A、3
    • B、1
    • C、4
    • D、6

    正确答案:C

  • 第14题：

    When configuring a WLAN controller for a voice application using Cisco 7920 wireless IP phones. Whichtwo general control settings should you select？（）

    • A、Multicast on
    • B、Aggressive Load Balancing off
    • C、Multicast off
    • D、AP Fallback on
    • E、Aggressive Load Balancing on

    正确答案:B,C

  • 第15题：

    Which three characteristics of the traffic flow are taken into consideration when the QoS-for-VPNs feature （QoS pre-classify） provides packet classification and applies appropriate QoS service on tunnel interfaces？（）

    • A、IP precedence bits
    • B、DSCP bits
    • C、original port numbers
    • D、DE bits
    • E、source IP address
    • F、destination IP address

    正确答案:C,E,F

  • 第16题：

    When configuring QoS on a wireless controller， the per-user， real-time bandwidth contract isenforced for which of the following protocols？（）

    • A、IPX
    • B、IP
    • C、UDP
    • D、TCP

    正确答案:C

  • 第17题：

    Which two statements about QoS options in a Cisco UCS environment are true？（）

    • A、 The QoS policy assigns a system class to the outgoing traffic for a vNIC or vHBA.
    • B、 Flow-control policies determine whether the uplink Ethernet ports in a Cisco UCS environment send and receive IEEE 802.3x pause frames when the send buffer for a port fills.
    • C、 If no system class is configured as CoS 0， the Fibre Channel system class is used.
    • D、 The user can configure QoS for these system classes： platinum， gold， silver， best effort， Fibre Channel.
    • E、 When configuring a system class， the type of adapter in a server may limit the maximum MTU supported.

    正确答案:A,E

  • 第18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.

    正确答案:C

  • 第19题：

    单选题
    Click the Exhibit button. When configuring WXC A's local WAN parameters, which QoS network parameter would you choose?（）
    A

    over-subscribed

    B

    under-subscribed

    C

    dedicated circuits

    D

    nondedicated circuits


    正确答案： A
    解析： 暂无解析

  • 第20题：

    单选题
    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  


    正确答案： B
    解析： 暂无解析

  • 第21题：

    单选题
    When configuring a wireless LAN controller for QoS， what 802.1p tag should be applied for video applications？ （）
    A

    3

    B

    1

    C

    4

    D

    6


    正确答案： A
    解析： 暂无解析

  • 第22题：

    单选题
    What accurately describes the usage of a Cisco AutoQoS command？（）
    A

    on Catalyst switches， the show auto discovery qos command is used to display the data collected during the Auto-Discovery phase

    B

    on Catalyst switches， the show auto qos command is used to display packet statistics of all classes that are configured for all service policies

    C

    on Cisco routers， the show mls qos maps command is used to verify the CoS-to-DSCP maps for egress packet queuing

    D

    on Cisco routers， the show auto qos command is used to display the AutoQoS interface templates， policy maps， class maps， and ACLs


    正确答案： C
    解析： 暂无解析

  • 第23题：

    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.


    正确答案： B
    解析： 暂无解析

  • 第24题：

    多选题
    Which two statements correctly identify factors to consider when Configuring WAN QoS？（）
    A

    Voice Traffic uses Assured Forwarding

    B

    Voice Signaling traffic uses Assured Forwarding

    C

    Voice Signaling traffic uses priority queuing

    D

    Voice Traffic uses priority queuing

    E

    Voice signaling traffic should use priority queuing with Assured Forwarding


    正确答案： A,B
    解析： 暂无解析

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