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单选题
MPLS label mapping on an LSR is displayed by which IOS command？（）
A
Show mpls Idp neighbor detail
B
Show mpls Idp bindings
C
Show mpls Idp parameters
D
Show mpls Idp discovery
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考题
Which device is responsible for assigning label values in an MPLS network?()
A. upstream nodeB. originating nodeC. destination nodeD. downstream node
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The router SIS-R has been configured in a CIS network. As a network administrator, you were required to enable MPLS on that router.Which of the following description is making sense on the basis of the output information?（）A. CEF switching is only needed to forward labeled packets.B. CEF switching is needed on both ingress and egress interfaces on which MPLS is enabled.C. Interface-level CEF switching is needed only on egress interfaces that are sending IP packets on which the egress LSR performs the label imposition process.D. Interface-level CEF switching is needed only on ingress interfaces that are receiving IP packets on which the ingress LSR performs the label imposition process.
考题
Which three of the following steps are mandatory when configuring MPLS on Cisco IOS? ()(Choose three.)
A. start LDPB. enable CEF switchingC. configure the MPLS IDD. disable IP TTL propagationE. configure conditional label advertisingF. enable label switching on frame mode interfaces
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Which of the following processes in IOS XR run exclusively on the Route Processor？（）A、bgpB、mpls_idpC、sysmgrD、wdsysmonE、gsp
考题
Which option describes the incorrect usage of the Label Distribution method？（）A、LDP is primarily used in internal networks of MPLS-VPN providers.B、MP-BGP is used for label distribution for VPN customer routes.C、Directed LDP is used for label distribution in L2-VPN Attachement Circuits.D、MP-BGP is used for label distribution in MPLS Traffic Engineered networks.
考题
In the context of MPLS，what is the correct action to be performed when an aggregate label is received ？（）A、It adds the VPN label into the top label in the MPLS label stackB、It replaces the top label in the MPLS label stack with a VPN label and propagatesC、It replaces the bottom label in the MPLS label stack with a VPN label and propagatesD、It removes the top label in the MPLS label stack and does a Layer 3 lookup on underlying IP packetsE、None of above
考题
What is the action of "pop" in the context of MPLS switching？（）A、It removes the top label in the MPLS label stack.B、It adds a top label in MPLS label stack.C、It replaces the top label in the MPLS label stack with another value.D、It replaces the top label in the MPLS label stack with a set of labels.E、None of above.
考题
下列关于MPLS lsr-id描述正确的是（）。A、lsr-id用来在MPLS网络中标识一台LSR设备B、lsr-id的格式与IP地址相同C、lsr-id在MPLS网络中唯一D、lsr-id必须配置成与该LSR的Router ID相同
考题
Cisco IOS is the software used on the vast majority of Cisco Systems routers and current Cisco network switches. As a network administrator, you are required to configure MPLS on Cisco IOS. In such a situation, which three of the following steps are necessary to take?（）A、Start LDP.B、Enable CEF switching.C、Configure conditional label advertising.D、Enable label switching on frame mode interfaces.E、disable IP TTL propagationF、configure conditional label advertising
考题
Which three of the following steps are mandatory when configuring MPLS on Cisco IOS? （）(Choose three.)A、start LDPB、enable CEF switchingC、configure the MPLS IDD、disable IP TTL propagationE、configure conditional label advertisingF、enable label switching on frame mode interfaces
考题
Which statement correctly describes the disabling of IP TTL propagation in an MPLS network？（）A、The TTL field from the IP packet is copied into the TTL field of the MPLS label header at the ingress edge LSRB、TTL propagation cannot be disabled in an MPLS domainC、TTL propagation is only disabled on the ingress edge LSRD、The TTL field of the MPLS label header is set to 255E、The TTL field of the IP packet is set to 0
考题
What IOS commands display MPLS label mapping on an LSR？（）A、Show mpls forwading-tableB、Show mpls ldp bindingsC、Show mpls ldp neighbor detailD、Show mpls ldp parametersE、Show mpls ldp discovery
考题
Which four services use the inner labels of an MPLS label stack？ （）A、MPLS VPNB、switching path in MPLS coreC、Cisco MPLS Traffic Engineering and Fast RerouteD、MPLS over ATME、VPN over Traffic Engineering coreF、any transport over MPLS
考题
Multi Protocol Label Switching （MPLS） is a data-carrying mechanism that belongs to the family of packet-switched networks. For an MPLS label， if the stack bit is set to1， which option is true？（）A、The stack bit will only be used when LDP is the label distribution protocolB、The label is the last entry in the label stack.C、The stack bit is for Cisco implementations exclusively and will only be used when TDP is the label distribution protocol.D、The stack bit is reserved for future use.
考题
MPLS label mapping on an LSR is displayed by which IOS command？（）A、Show mpls Idp neighbor detailB、Show mpls Idp bindingsC、Show mpls Idp parametersD、Show mpls Idp discovery
考题
单选题Which option describes the incorrect usage of the Label Distribution method？（）A
LDP is primarily used in internal networks of MPLS-VPN providers.B
MP-BGP is used for label distribution for VPN customer routes.C
Directed LDP is used for label distribution in L2-VPN Attachement Circuits.D
MP-BGP is used for label distribution in MPLS Traffic Engineered networks.
考题
单选题Which statement correctly describes the disabling of IP TTL propagation in an MPLS network？（）A
The TTL field from the IP packet is copied into the TTL field of the MPLS label header at the ingress edge LSRB
TTL propagation cannot be disabled in an MPLS domainC
TTL propagation is only disabled on the ingress edge LSRD
The TTL field of the MPLS label header is set to 255E
The TTL field of the IP packet is set to 0
考题
多选题If an edge Label Switch Router （LSR） is properly configured，which three combinations are possible？（）AA received IP packet is forwarded based on the IP destination address and the packet is sent as an IP packet.BAn IP destination exists in the IP forwarding table. A received labeled packet is dropped because the label is not found in the LFIB table.CThere is an MPLS label-switched path toward the destination. A received IP packet is dropped because the destination is not found in the IP forwarding table.DA received IP packet is forwarded based on the IP destination address and the packet is sent as a labeled packet.EA received labeled IP packet is forwarded based upon both the label and the IP address.FA received labeled packet is forwarded based on the label. After the label is swapped，the newly labeled packet is sent.
考题
单选题What IOS commands display MPLS label mapping on an LSR？（）A
Show mpls forwading-tableB
Show mpls ldp bindingsC
Show mpls ldp neighbor detailD
Show mpls ldp parametersE
Show mpls ldp discovery
考题
多选题Cisco IOS is the software used on the vast majority of Cisco Systems routers and current Cisco network switches. As a network administrator, you are required to configure MPLS on Cisco IOS. In such a situation, which three of the following steps are necessary to take?（）AStart LDP.BEnable CEF switching.CConfigure conditional label advertising.DEnable label switching on frame mode interfaces.Edisable IP TTL propagationFconfigure conditional label advertising
考题
多选题Which four services use the inner labels of an MPLS label stack？ （）AMPLS VPNBswitching path in MPLS coreCCisco MPLS Traffic Engineering and Fast RerouteDMPLS over ATMEVPN over Traffic Engineering coreFany transport over MPLS
考题
单选题Which device is responsible for assigning label values in an MPLS network?（）A
upstream nodeB
originating nodeC
destination nodeD
downstream node
考题
单选题What is the action of "pop" in the context of MPLS switching？（）A
It removes the top label in the MPLS label stack.B
It adds a top label in MPLS label stack.C
It replaces the top label in the MPLS label stack with another value.D
It replaces the top label in the MPLS label stack with a set of labels.E
None of above.
考题
单选题In the context of MPLS，what is the correct action to be performed when an aggregate label is received ？（）A
It adds the VPN label into the top label in the MPLS label stackB
It replaces the top label in the MPLS label stack with a VPN label and propagatesC
It replaces the bottom label in the MPLS label stack with a VPN label and propagatesD
It removes the top label in the MPLS label stack and does a Layer 3 lookup on underlying IP packetsE
None of above
考题
多选题Which three of the following steps are mandatory when configuring MPLS on Cisco IOS?（）(Choose three.)Astart LDPBenable CEF switchingCconfigure the MPLS IDDdisable IP TTL propagationEconfigure conditional label advertisingFenable label switching on frame mode interfaces
考题
单选题Multi Protocol Label Switching （MPLS） is a data-carrying mechanism that belongs to the family of packet-switched networks. For an MPLS label， if the stack bit is set to1， which option is true？（）A
The stack bit will only be used when LDP is the label distribution protocolB
The label is the last entry in the label stack.C
The stack bit is for Cisco implementations exclusively and will only be used when TDP is the label distribution protocol.D
The stack bit is reserved for future use.
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