Toprovidequalityofservice(QoS)forvoicetrafficinanIEEE802.1qnetwork,whichclassofservice(CoS)valueshouldbeusedinthe3－bit,userprioritybits(PRI)field?()A.ThePRIfieldshouldcontaintheCosvalueof010B.ThePRIfieldshouldcontaintheCosvalueof011C.ThePRIfieldshouldcont

题目
Toprovidequalityofservice(QoS)forvoicetrafficinanIEEE802.1qnetwork,whichclassofservice(CoS)valueshouldbeusedinthe3－bit,userprioritybits(PRI)field?()

A.ThePRIfieldshouldcontaintheCosvalueof010

B.ThePRIfieldshouldcontaintheCosvalueof011

C.ThePRIfieldshouldcontaintheCosvalueof100

D.ThePRIfieldshouldcontaintheCosvalueof101

E.ThePRIfieldshouldcontaintheCosvalueof110

F.ThePRIfieldshouldcontaintheCoSvalueof111

相似考题

1.Which two statements about voice VLANs are correct？（）A、Voice VLANs eliminate the need for QoS configurationB、Voice VLANs are used on trunk links to eliminate the need for QoS CoS markingsC、Voice VLANs are mainly used to reduce the number of access switch ports that are used in the networkD、Voice VLANs can be configured to forward existing CoS priorities or override themE、Voice VLANs are mainly used between access layer switches and distribution layer switchesF、Voice VLANs can be configured on Layer 2 ports only

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.TN承载业务QOS规划VLAN PRI正确的是（）A、语音VLAN PRI值：5B、网管VLAN PRI值：7C、实时游戏，高速上网VLAN PRI值：4D、视频在线流媒体VLAN PRI值：2

参考答案和解析
参考答案：D
更多“Toprovidequalityofservice(QoS)forvoicetrafficinanIEEE802.1qnetwork,whichclassofservice(CoS)valueshouldbeusedinthe3－bit,userprioritybits(PRI)field?() ”相关问题

  • 第1题：

    Which two QoS classification and marking statements are true？ （）

    • A、 In a Frame Relay network， delay sensitive traffic is tagged with the discard eligible （DE） bit.
    • B、 In an MPLS network， the three most significant bits of the DSCP or the IP precedence of the IP packet are copied into the MPLS EXP field.
    • C、 In an MPLS network， the MPLS EXP bits are used to identify up to 16 CoS values.
    • D、 The differentiated services code point （DSCP） field consists of the first three bits of the IP precedence field in the header of an IP packet.
    • E、 The 802.1Q standard uses a three bit field referred to as the user priority bits （PRI） to mark packets as belonging to a specific CoS.

    正确答案:B,E

  • 第2题：

    End-to-end QoS is maintained in the Cisco WLAN deployment model by utilizing what parameter in lieu of 802.1p？（）

    • A、 IP precedence
    • B、 type of service （ToS）
    • C、 class of service （CoS）
    • D、 differentiated services code point （DSCP）

    正确答案:D

  • 第3题：

    To provide quality of service （QoS） for voice traffic in an IEEE 802.1 q network， which class of service （CoS） value should be used in the 3-bit， user priority bits （PRI） field？ （）

    • A、The PRI field should contain the Cos value of 010
    • B、The PRI field should contain the Cos value of 011
    • C、The PRI field should contain the Cos value of 100
    • D、The PRI field should contain the Cos value of 101
    • E、The PRI field should contain the Cos value of 110
    • F、The PRI field should contain the CoS value of 111

    正确答案:D

  • 第4题：

    Which statement is true about The QoS Class Fibre Channel？（）

    • A、 Cannot be disabled
    • B、 Cannot have the CoS changed
    • C、 Can have "Packet Drop" enabled
    • D、 Is multicast optimized
    • E、 Can have the MTU changed

    正确答案:A

  • 第5题：

    You need to configure a new Cisco router to be installed in the Company VOIP network.  Which  three interface commands will configure the switch port to support a connected Cisco phone and  to trust the CoS values received on the port if CDP discovers that a Cisco phone is attached？ （）

    • A、switchport voice vlan vlan-id
    • B、mls qos trust device cisco-phone
    • C、switchport priority extend cos_value
    • D、mls qos trust cos
    • E、mls qos trust override cos

    正确答案:A,B,D

  • 第6题：

    多选题
    TN承载业务QOS规划VLAN PRI正确的是（）
    A

    语音VLAN PRI值：5

    B

    网管VLAN PRI值：7

    C

    实时游戏，高速上网VLAN PRI值：4

    D

    视频在线流媒体VLAN PRI值：2


    正确答案： B,D
    解析： 暂无解析

  • 第7题：

    多选题
    Which three statements about classification marking of traffic at Layer 2 are true？ （）
    A

    a Frame Relay header includes a 1-bit discard eligible （DE） bit to provide the class of service （CoS）

    B

    an ATM header includes a 1-bit DE field to provide the CoS

    C

    an MPLS EXP field is inserted in the Layer 3 IP precedence field to identify the CoS

    D

    the CoS field only exists inside Ethernet frames when 802.1Q or Inter-Switch Link （ISL） trunking is used

    E

    in the IEEE 802.1p standard， three bits are used to identify the user priority bits for the CoS

    F

    in the IEEE 802.1q standard， six bits are used to identify the user priority bits for the CoS


    正确答案： F,E
    解析： 暂无解析

  • 第8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9题：

    多选题
    Which two QoS classification and marking statements are true？ （）
    A

    In a Frame Relay network， delay sensitive traffic is tagged with the discard eligible （DE） bit.

    B

    In an MPLS network， the three most significant bits of the DSCP or the IP precedence of the IP packet are copied into the MPLS EXP field.

    C

    In an MPLS network， the MPLS EXP bits are used to identify up to 16 CoS values.

    D

    The differentiated services code point （DSCP） field consists of the first three bits of the IP precedence field in the header of an IP packet.

    E

    The 802.1Q standard uses a three bit field referred to as the user priority bits （PRI） to mark packets as belonging to a specific CoS.


    正确答案： B,D
    解析： 暂无解析

  • 第10题：

    多选题
    Which two statements correctly describe a Cisco WLC configuration of Wireless > QoS > Profiles >Wired_QoS_Profiles for an implementation of DSCP or CoS deployment?（）
    A

    It must always be set on all QoS profile types because this sets the type of markings as either CoS or DSCP.

    B

    It is optional if the Cisco WLC attached switch operates on a trust DSCP model.

    C

    It must be set if the Cisco WLC attached switch operates on a trust CoS model.

    D

    It sets the EDCF queue used for the radio-transmitted frames.


    正确答案： D,B
    解析： 暂无解析

  • 第11题：

    单选题
    Which statement is correct for both the LWAPP and CAPWAP AP upstream 802.1Q tagged wired QoS priority for a non-WMM-associated client frame that is H-REAP locally switched running v5.2?（）
    A

    Wireless client WMM UP classification is translated to a wired DSCP priority.

    B

    Wireless client 802.11p classification is translated to a wired DSCP priority.

    C

    Wireless client WMM UP classification is translated to a wired 802.1p CoS priority.

    D

    Wireless client 802.11p classification is translated to a wired 802.1p CoS priority.

    E

    WLAN configured QoS level is used to set the wired DSCP priority.

    F

    Wired 802.1p CoS priority is not set.


    正确答案： E
    解析： 暂无解析

  • 第12题：

    单选题
    Which statement is true about The QoS Class Fibre Channel？（）
    A

     Cannot be disabled

    B

     Cannot have the CoS changed

    C

     Can have Packet Drop enabled

    D

     Is multicast optimized

    E

     Can have the MTU changed


    正确答案： B
    解析： 暂无解析

  • 第13题：

    Which two QoS classification and marking statements are true？（）

    • A、 In a Frame Relay network， delay sensitive traffic is tagged with the discard eligible （DE） bit.
    • B、 In an MPLS network， the three most significant bits of the DSCP or the IP precedence of the IP packet are copied into the MPLS EXP field
    • C、 In an MPLS network， the MPLS EXP bits are used to identify up to 16 CoS values.
    • D、 The differentiated services code point （DSCP） field consists of the first three bits of the IP precedence field in the header of an IP packet.
    • E、 The 802.10 standard uses a three bitfield referred to as the user priority bits （PRI） to mark packets as belonging to a specific CoS.

    正确答案:B,E

  • 第14题：

    Which two statements correctly describe a Cisco WLC configuration of Wireless > QoS > Profiles >Wired_QoS_Profiles for an implementation of DSCP or CoS deployment?（）

    • A、It must always be set on all QoS profile types because this sets the type of markings as either CoS or DSCP.
    • B、It is optional if the Cisco WLC attached switch operates on a trust DSCP model.
    • C、It must be set if the Cisco WLC attached switch operates on a trust CoS model.
    • D、It sets the EDCF queue used for the radio-transmitted frames.

    正确答案:B,C

  • 第15题：

    You need to configure a new Cisco router to be installed in the VOIP network. Which threeinterface commands will configure the switch port to support a connected Cisco phone and to trustthe CoS values received on the port if CDP discovers that a Cisco phone is attached？（）

    • A、switchport voice vlan vlan-id
    • B、mls qos trust device cisco-phone
    • C、switchport priority extend cos_value
    • D、mls qos trust cos
    • E、mls qos trust override cos

    正确答案:A,B,D

  • 第16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17题：

    多选题
    Which two QoS classification and marking statements are true？（）
    A

    In a Frame Relay network， delay sensitive traffic is tagged with the discard eligible （DE） bit.

    B

    In an MPLS network， the three most significant bits of the DSCP or the IP precedence of the IP packet are copied into the MPLS EXP field

    C

    In an MPLS network， the MPLS EXP bits are used to identify up to 16 CoS values.

    D

    The differentiated services code point （DSCP） field consists of the first three bits of the IP precedence field in the header of an IP packet.

    E

    The 802.10 standard uses a three bitfield referred to as the user priority bits （PRI） to mark packets as belonging to a specific CoS.


    正确答案： A,B
    解析： 暂无解析

  • 第18题：

    单选题
    Refer to the exhibit. What is the effect on the trust boundary of configuring the command mls qos trust  cos on the switch port that is connected to the IP phone？（）
    A

     Effectively the trust boundary has been moved to the IP phone.

    B

     The host is now establishing the CoS value and has effectively become the trust boundary. 

    C

     The switch is rewriting packets it receives from the IP phone and determining the CoS value.  

    D

     The switch will no longer tag incoming voice packets and will trust the distribution layer switch to set theCoS

    E

     RTP will be used to negotiate a CoS value based upon bandwidth utilization on the link.


    正确答案： A
    解析： 暂无解析

  • 第19题：

    单选题
    To provide quality of service （QoS） for voice traffic in an IEEE 802.1 q network， which class of service （CoS） value should be used in the 3-bit， user priority bits （PRI） field？ （）
    A

    The PRI field should contain the Cos value of 010

    B

    The PRI field should contain the Cos value of 011

    C

    The PRI field should contain the Cos value of 100

    D

    The PRI field should contain the Cos value of 101

    E

    The PRI field should contain the Cos value of 110

    F

    The PRI field should contain the CoS value of 111


    正确答案： F
    解析： 暂无解析

  • 第20题：

    单选题
    Refer to the exhibit. Which Catalyst switch interface command would be used to cause the switch to instruct the phone to override the incoming CoS from the PC before forwarding the packet to the switch？（）
    A

    switchport priority extend trust

    B

    switchport priority extend cos 2

    C

    switchport priority extend cos 11

    D

    mls qos cos 2

    E

    mls qos cos 2 override


    正确答案： C
    解析： 暂无解析

  • 第21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22题：

    判断题
    在802.1Q头部中包括3比特长的PRI字段，PRI字段定义了8中业务优先级Cos，按照优先级从高到低顺序取值为0、1、2、……、6和7
    A

    对

    B

    错


    正确答案： 错
    解析： 暂无解析

  • 第23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

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