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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
参考答案
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 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” 相关考题
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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.
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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
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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-classifyB、in global configuration mode， apply the service policy but do not use the qos pre-classify commandC、apply the service policy on the physical interface but do not use the qos pre-classifyD、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
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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.
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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 numberB、The IPSEC mode （tunnel or transport）C、The GRE tunnel interface IP addressD、The GRE tunnel source interface or IP address， and tunnel destination IP addressE、The MTU size of the GRE tunnel interface
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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.
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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 tunnelB、supports multi-protocol （non-IP） traffic over the tunnelC、reduces IPsec headers overhead since tunnel mode is usedD、simplifies the ACL used in the crypto mapE、uses Virtual Tunnel Interface （VTI） to simplify the IPsec VPN configuration
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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.
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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 informationB、VPN traffic needs to be classified based on the IP precedence or DSCPC、VPN traffic needs to be classified based on IP flow or Layer 3 information， such as source and destination IP addressD、VPN traffic with Authentication Header （AH） needs to preserve the ToS byte
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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 bitsB、DSCP bitsC、original port numbersD、DE bitsE、source IP addressF、destination IP address
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What is true about Quality of Service （QoS） for VPNs？（）A、QoS preclassification is only supported on generic routing encapsulation （GRE） and IPsec VPNsB、QoS preclassification is not required in Layer 2 Tunneling Protocol （L2TP）， Layer2 Forwarding （L2F）， and Point-to-Point Tunneling Protocol （PPTP） VPNsC、QoS preclassification is supported on IPsec AH VPNs， but not on IPsec ESP VPNsD、the QoS-for-VPNs feature （QoS preclassification） is designed for VPN transport interfacesE、with IPsec tunnel mode， the type of service （ToS） byte value is copied automatically from the original IP header to the tunnel header
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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 storageB、stores a secured copy of the Cisco IOS image in its persistent storageC、backs up the Cisco IOS image from flash to a TFTP serverD、enables Cisco IOS image resilience
考题
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 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
考题
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.
考题
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？（）AThe crypto ACL numberBThe IPSEC mode （tunnel or transport）CThe GRE tunnel interface IP addressDThe GRE tunnel source interface or IP address， and tunnel destination IP addressEThe MTU size of the GRE tunnel interface
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多选题Which two statements or sets of statements are true about the application of the qos pre-classify command？（）AIf 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.BThe ToS byte is copied to the outer header by default. Therefore， the qos pre-classify command is not necessary.CWith GRE encapsulation， the qos pre-classify command is applied on the tunnel interface. This practice allows for different OoS configurations on each tunnel.DWith GRE encapsulation， the qos pre-classify command is applied on the physical interface. This practice allows for different OoS configurations on each interface.EWith IPsec encapsulation， the qos pre-classify command is applied on the physical interface. This practice allows for different OoS configurations on each interface.
考题
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 informationB
VPN traffic needs to be classified based on the IP precedence or DSCPC
VPN traffic needs to be classified based on IP flow or Layer 3 information， such as source and destination IP addressD
VPN traffic with Authentication Header （AH） needs to preserve the ToS byte
考题
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 VPNsB
QoS preclassification is not required in Layer 2 Tunneling Protocol （L2TP）， Layer2 Forwarding （L2F）， and Point-to-Point Tunneling Protocol （PPTP） VPNsC
QoS preclassification is supported on IPsec AH VPNs， but not on IPsec ESP VPNsD
the QoS-for-VPNs feature （QoS preclassification） is designed for VPN transport interfacesE
with IPsec tunnel mode， the type of service （ToS） byte value is copied automatically from the original IP header to the tunnel header
考题
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.
考题
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 flashB
Router# copy flash runC
Router(config)# restore flashD
Router(config)# repair flashE
Router#copy flash tftpF
Router# copy start flash
考题
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 storageB
stores a secured copy of the Cisco IOS image in its persistent storageC
backs up the Cisco IOS image from flash to a TFTP serverD
enables Cisco IOS image resilience
考题
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？（）AIP precedence bitsBDSCP bitsCoriginal port numbersDDE bitsEsource IP addressFdestination IP address
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