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
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 stack
- B、It replaces the top label in the MPLS label stack with a VPN label and propagates
- C、It replaces the bottom label in the MPLS label stack with a VPN label and propagates
- D、It removes the top label in the MPLS label stack and does a Layer 3 lookup on underlying IP packets
- E、None of above
相关考题：
在MPLS中,LDP的具体解释()。 A.Label Data PairB.Label Distribution PairC.Label Distribution ProtocolD.Label Data Protocol
Why is it appropriate to use conditional label advertising when deploying MPLS? () A. to make CEF tables smallerB. to enable label switching on the frame mode interfaceC. to restrict MPLS availability to predefined time periodsD. to restrict label switching to a limited number of networksE. to restrict end users from seeing the routers in the MPLS network
在MPLS中，LSP的具体解释（）。A、Label Selection PairB、Label Switched PathC、Lightweight Signaling ProtocolD、Large Sampling Path
Why is it appropriate to use conditional label advertising when deploying MPLS? （）A、to make CEF tables smallerB、to enable label switching on the frame mode interfaceC、to restrict MPLS availability to predefined time periodsD、to restrict label switching to a limited number of networksE、to restrict end users from seeing the routers in the MPLS network
Which 4 statements regarding MPLS Label Stack Encoding is true？（）A、A value of 4 represents the "Implicit NULL Label."B、A value of 0 represents the "IPv4 Explicit NULL Label."C、A value of 1 represents the "Router Alert Label". The use of this label is analogous to the use of the"Router Alert Option" in IP packets （for example， ping with record route option）D、A value of 2 represents the "IPv6 Explicit NULL Label"E、A value of 1 represents the "IPv1 Explicit NULL Label"F、A value of 3 represents the "Implicit NULL Label"
There is MPLS VPN traffic traversing through a TE intermediate router. What is the MPLS packet labelstack sequence （from outer to inner） for the VPN traffic on this router？（）A、TE label， IGP label， VPN labelB、IGP label， TE label， VPN labelC、TE label， VPN label， IGP labelD、VPN label， IGP label， TE labelE、IGP label， VPN label， TE label
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.
What are the four fields in an MPLS label？（）A、versionB、experimentalC、labelD、protocolE、TTLF、bottom-of-stack indicato
As a network administrator, you are required to deploy MPLS technology. During the deployment, it is recommended to apply conditional label advertising. What is most probably the reason for that?（）A、to enable label switching on the frame mode interfaceB、to restrict MPLS availability to predefined time periodsC、to restrict end users from seeing the routers in the MPLS networkD、to restrict label switching to a limited number of networks
Using more than one label on a single packet is required in what context？（）A、MPLS TEB、MPLS VPNC、When CEF switching and Label switching is doneD、In all the above circumstances
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.
在MPLS中，LDP的具体解释（）。A、Label Data PairB、Label Distribution PairC、Label Distribution ProtocolD、Label Data Protocol
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
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
In Any Transport over MPLS （AtoM） Control word is an optional 4-byte field used in the pseudowire packet.The control word carries generic and Layer 2 payload-specific information to emulate L2 packets correctly.In pseudowire packet， where is this Control Word inserted？（）A、Inserted between the MPLS label stack and the Layer 3 payloadB、Inserted between the MPLS label stack and the Layer 3 HeaderC、Inserted between the MPLS label stack and the Layer 2 payloadD、Inserted between the MPLS label stack and the Layer 2 header
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.
在MPLS中，LSP指的是：（）。A、Label Selection PairB、Label Switched PathC、Lighweight Signaling ProtocolD、Large Sampling Path
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？（）AThe stack bit will only be used when LDP is the label distribution protocolBThe label is the last entry in the label stack.CThe stack bit is for Cisco implementations exclusively and will only be used when TDP is the label distribution protocol.DThe stack bit is reserved for future use.
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
单选题Why is it appropriate to use conditional label advertising when deploying MPLS?（）Ato make CEF tables smallerBto enable label switching on the frame mode interfaceCto restrict MPLS availability to predefined time periodsDto restrict label switching to a limited number of networksEto restrict end users from seeing the routers in the MPLS network
单选题What is the action of "pop" in the context of MPLS switching？（）AIt removes the top label in the MPLS label stack.BIt adds a top label in MPLS label stack.CIt replaces the top label in the MPLS label stack with another value.DIt replaces the top label in the MPLS label stack with a set of labels.ENone of above.
多选题What are the four fields in an MPLS label？（）AversionBexperimentalClabelDprotocolETTLFbottom-of-stack indicato
单选题In the context of MPLS，what is the correct action to be performed when an aggregate label is received ？（）AIt adds the VPN label into the top label in the MPLS label stackBIt replaces the top label in the MPLS label stack with a VPN label and propagatesCIt replaces the bottom label in the MPLS label stack with a VPN label and propagatesDIt removes the top label in the MPLS label stack and does a Layer 3 lookup on underlying IP packetsENone of above
单选题As a network administrator, you are required to deploy MPLS technology. During the deployment, it is recommended to apply conditional label advertising. What is most probably the reason for that?（）Ato enable label switching on the frame mode interfaceBto restrict MPLS availability to predefined time periodsCto restrict end users from seeing the routers in the MPLS networkDto restrict label switching to a limited number of networks
单选题Which option describes the incorrect usage of the Label Distribution method？（）ALDP is primarily used in internal networks of MPLS-VPN providers.BMP-BGP is used for label distribution for VPN customer routes.CDirected LDP is used for label distribution in L2-VPN Attachement Circuits.DMP-BGP is used for label distribution in MPLS Traffic Engineered networks.
单选题There is MPLS VPN traffic traversing through a TE intermediate router. What is the MPLS packet labelstack sequence （from outer to inner） for the VPN traffic on this router？（）ATE label， IGP label， VPN labelBIGP label， TE label， VPN labelCTE label， VPN label， IGP labelDVPN label， IGP label， TE labelEIGP label， VPN label， TE label