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 heade

题目

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
相似考题

1.备份路由器IOS的命令是：()A.copy flash tftpB.copy running-configt ftpC.copy IOS tftpD.copy startup-configt ftp

2.Which three characteristics of the traffic flow are taken into consideration when the OoS-for-VPNs feature （OoS pre-classify） provides packet classification and applies appropriate OoS service on tunnel interfaces？ （）A、IP precedence bitsB、DSCP bitsC、original port numbersD、DE bitsE、source IP addressF、destination IP address

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

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.

参考答案和解析
正确答案:B
更多“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 heade”相关问题

  • 第1题：

    A GRE tunnel is configured between a local and a remote site. Where should the service policy be applied to classify packets based on the pretunnel header? （）

    • A、in global configuration mode， apply the service policy and use the qos pre-classify
    • B、in global configuration mode， apply the service policy but do not use the qos pre-classify command
    • C、apply the service policy on the physical interface but do not use the qos pre-classify
    • D、apply the service policy on the tunnel interface but do not use the qos pre-classify command 
    • E、apply the service policy on the tunnel interface and use the qos pre-classify command

    正确答案:C

  • 第2题：

    You need to upgrade the IOS of an existing router on your network. The new IOS image is located on a TFTP server that you have set up within the network. What command should you issue in order to download the new IOS version?（）

    • A、Router# copy tftp flash
    • B、Router# copy flash run
    • C、Router(config)# restore flash
    • D、Router(config)# repair flash
    • E、Router#copy flash tftp
    • F、Router# copy start flash

    正确答案:A

  • 第3题：

    You need to configure a GRE tunnel on a IPSec router. When you are using the SDM to configurea GRE tunnel over IPsec， which two parameters are required when defining the tunnel interfaceinformation？（）

    • A、The crypto ACL number
    • B、The IPSEC mode （tunnel or transport）
    • C、The GRE tunnel interface IP address
    • D、The GRE tunnel source interface or IP address， and tunnel destination IP address
    • E、The MTU size of the GRE tunnel interface

    正确答案:C,D

  • 第4题：

    Which three features are benefits of using GRE tunnels in conjunction with IPsec for building site-to-site VPNs？（）

    • A、allows dynamic routing over the tunnel
    • B、supports multi-protocol （non-IP） traffic over the tunnel
    • C、reduces IPsec headers overhead since tunnel mode is used
    • D、simplifies the ACL used in the crypto map
    • E、uses Virtual Tunnel Interface （VTI） to simplify the IPsec VPN configuration

    正确答案:A,B,D

  • 第5题：

    Which QoS preclassification option will require the use of the qos pre-classify command for the VPN traffic？ （）

    • A、VPN traffic needs to be classified based on the Layer2 header information
    • B、VPN traffic needs to be classified based on the IP precedence or DSCP
    • C、VPN traffic needs to be classified based on IP flow or Layer 3 information， such as source and destination IP address
    • D、VPN traffic with Authentication Header （AH） needs to preserve the ToS byte

    正确答案:C

  • 第6题：

    What is true about Quality of Service （QoS） for VPNs？（）

    • A、QoS preclassification is only supported on generic routing encapsulation （GRE） and IPsec VPNs
    • B、QoS preclassification is not required in Layer 2 Tunneling Protocol （L2TP）， Layer2 Forwarding （L2F）， and Point-to-Point Tunneling Protocol （PPTP） VPNs
    • C、QoS preclassification is supported on IPsec AH VPNs， but not on IPsec ESP VPNs
    • D、the QoS-for-VPNs feature （QoS preclassification） is designed for VPN transport interfaces
    • E、with IPsec tunnel mode， the type of service （ToS） byte value is copied automatically from the original IP header to the tunnel header

    正确答案:C

  • 第7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8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9题：

    多选题
    Which two statements or sets of statements are true about the application of the qos pre-classify command？（）
    A

    If the classification policy is based upon the ToS byte， the qos pre-classify command is required because the ToS byte only appears in the inner IP header.

    B

    The ToS byte is copied to the outer header by default. Therefore， the qos pre-classify command is not necessary.

    C

    With GRE encapsulation， the qos pre-classify command is applied on the tunnel interface. This practice allows for different OoS configurations on each tunnel.

    D

    With GRE encapsulation， the qos pre-classify command is applied on the physical interface. This practice allows for different OoS configurations on each interface.

    E

    With IPsec encapsulation， the qos pre-classify command is applied on the physical interface. This practice allows for different OoS configurations on each interface.


    正确答案： C,B
    解析： 暂无解析

  • 第10题：

    单选题
    What is true about Quality of Service （QoS） for VPNs？（）
    A

    QoS preclassification is only supported on generic routing encapsulation （GRE） and IPsec VPNs

    B

    QoS preclassification is not required in Layer 2 Tunneling Protocol （L2TP）， Layer2 Forwarding （L2F）， and Point-to-Point Tunneling Protocol （PPTP） VPNs

    C

    QoS preclassification is supported on IPsec AH VPNs， but not on IPsec ESP VPNs

    D

    the QoS-for-VPNs feature （QoS preclassification） is designed for VPN transport interfaces

    E

    with IPsec tunnel mode， the type of service （ToS） byte value is copied automatically from the original IP header to the tunnel header


    正确答案： D
    解析： 暂无解析

  • 第11题：

    单选题
    You need to upgrade the IOS of an existing router on your network. The new IOS image is located on a TFTP server that you have set up within the network. What command should you issue in order to download the new IOS version?（）
    A

    Router# copy tftp flash

    B

    Router# copy flash run

    C

    Router(config)# restore flash

    D

    Router(config)# repair flash

    E

    Router#copy flash tftp

    F

    Router# copy start flash


    正确答案： C
    解析： 暂无解析

  • 第12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： C,E
    解析： 暂无解析

  • 第13题：

    Which two statements or sets of statements are true about the application of the qos pre-classify command？（）

    • A、 If the classification policy is based upon the ToS byte， the qos pre-classify command is required because the ToS byte only appears in the inner IP header.
    • B、 The ToS byte is copied to the outer header by default. Therefore， the qos pre-classify command is not necessary.
    • C、 With GRE encapsulation， the qos pre-classify command is applied on the tunnel interface. This practice allows for different OoS configurations on each tunnel.
    • D、 With GRE encapsulation， the qos pre-classify command is applied on the physical interface. This practice allows for different OoS configurations on each interface.
    • E、 With IPsec encapsulation， the qos pre-classify command is applied on the physical interface. This practice allows for different OoS configurations on each interface.

    正确答案:B,C

  • 第14题：

    What is a benefit of Internet protocol (IP) telephony?（）

    • A、Synchronizes password exchanges for call setup
    • B、Eliminates the need for physical cabling in a TCP/IP network
    • C、Enables two-way voice transmission over a packet-switched TCP/IP network
    • D、Creates an encrypted tunnel for voice through a Transmission Control Protocol (TCP)/IP network

    正确答案:C

  • 第15题：

    What method in a Cisco IOS router can confirm that packets marked for a particular QoS marking are being matched?（）

    • A、Issue a show policy-map interface command. 
    • B、Assuming Netflow is enabled, issue a show ip cache verbose flow command.
    • C、Issue a show crypto ipsec session command.
    • D、Issue a debug qos set command and a terminal monitor command.

    正确答案:A

  • 第16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17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18题：

    What is the purpose of the secure boot-config global configuration ？（）

    • A、takes a snapshot of the router running configuration and securely archives it in persistent storage
    • B、stores a secured copy of the Cisco IOS image in its persistent storage
    • C、backs up the Cisco IOS image from flash to a TFTP server
    • D、enables Cisco IOS image resilience

    正确答案:A

  • 第19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： B
    解析： 暂无解析

  • 第20题：

    多选题
    You need to configure a GRE tunnel on a IPSec router. When you are using the SDM to configurea GRE tunnel over IPsec， which two parameters are required when defining the tunnel interfaceinformation？（）
    A

    The crypto ACL number

    B

    The IPSEC mode （tunnel or transport）

    C

    The GRE tunnel interface IP address

    D

    The GRE tunnel source interface or IP address， and tunnel destination IP address

    E

    The MTU size of the GRE tunnel interface


    正确答案： A,D
    解析： 暂无解析

  • 第21题：

    单选题
    Which QoS preclassification option will require the use of the qos pre-classify command for the VPN traffic？ （）
    A

    VPN traffic needs to be classified based on the Layer2 header information

    B

    VPN traffic needs to be classified based on the IP precedence or DSCP

    C

    VPN traffic needs to be classified based on IP flow or Layer 3 information， such as source and destination IP address

    D

    VPN traffic with Authentication Header （AH） needs to preserve the ToS byte


    正确答案： D
    解析： 暂无解析

  • 第22题：

    单选题
    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.


    正确答案： A
    解析： 暂无解析

  • 第23题：

    单选题
    What is the purpose of the secure boot-config global configuration ？（）
    A

    takes a snapshot of the router running configuration and securely archives it in persistent storage

    B

    stores a secured copy of the Cisco IOS image in its persistent storage

    C

    backs up the Cisco IOS image from flash to a TFTP server

    D

    enables Cisco IOS image resilience


    正确答案： A
    解析： 暂无解析

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