多选题MPLS label headers for packet media consist of（）.AVersionBLabelCCOS/EXPDTTLES flag

题目
多选题
MPLS label headers for packet media consist of（）.
A

Version

B

Label

C

COS/EXP

D

TTL

E

S flag

相似考题

1.A router receives a packet from a neighbor with an MPLS shim header value of 0.What does the router do with this packet?()A. It performs a label pop operation and an IP lookup.B. It performs a label swap operation and an IP lookup.C. It sends an error message toward the egress router.D. It sends an error message toward the ingress router.

2.MPLS标签（Label）长度为（）。

3.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

4.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

更多“MPLS label headers for packet media consist of（）.”相关问题

  • 第1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？（）

    • A、TE label， IGP label， VPN label
    • B、IGP label， TE label， VPN label
    • C、TE label， VPN label， IGP label
    • D、VPN label， IGP label， TE label
    • E、IGP label， VPN label， TE label

    正确答案:A

  • 第2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?（）

    • A、to enable label switching on the frame mode interface
    • B、to restrict MPLS availability to predefined time periods
    • C、to restrict end users from seeing the routers in the MPLS network
    • D、to restrict label switching to a limited number of networks

    正确答案:D

  • 第3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.

    正确答案:A

  • 第4题：

    A router receives a packet from a neighbor with an MPLS shim header value of 0.What does the router do with this packet?（）

    • A、It performs a label pop operation and an IP lookup.
    • B、It performs a label swap operation and an IP lookup.
    • C、It sends an error message toward the egress router.
    • D、It sends an error message toward the ingress router.

    正确答案:A

  • 第5题：

    MPLS label headers for packet media consist of（）.

    • A、Version
    • B、Label
    • C、COS/EXP
    • D、TTL
    • E、S flag

    正确答案:B,C,D,E

  • 第6题：

    Which three MPLS statements are true？（）

    • A、Cisco Express Forwarding （CEF） must be enabled as a prerequisite to running MPLS on a Cisco router.
    • B、Frame-mode MPLS inserts a 32-bit label between the Layer 3 and Layer 4 headers.
    • C、MPLS is designed for use with frame-based Layer 2 encapsulation protocols such as Frame Relay， but is not supported by ATM because of ATM fixed-length cells.
    • D、OSPF， EIGRP， IS-IS， RIP， and BGP can be used in the control plane.
    • E、The control plane is responsible for forwarding packets.
    • F、The two major components of MPLS include the control plane and the data plane.

    正确答案:A,D,F

  • 第7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 protocol
    • B、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.

    正确答案:B

  • 第8题：

    多选题
    MPLS label headers for packet media consist of（）.
    A

    Version

    B

    Label

    C

    COS/EXP

    D

    TTL

    E

    S flag


    正确答案： A,C
    解析： 暂无解析

  • 第9题：

    多选题
    If an edge Label Switch Router （LSR） is properly configured，which three combinations are possible？（）
    A

    A received IP packet is forwarded based on the IP destination address and the packet is sent as an IP packet.

    B

    An IP destination exists in the IP forwarding table. A received labeled packet is dropped because the label is not found in the LFIB table.

    C

    There 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.

    D

    A received IP packet is forwarded based on the IP destination address and the packet is sent as a labeled packet.

    E

    A received labeled IP packet is forwarded based upon both the label and the IP address.

    F

    A received labeled packet is forwarded based on the label. After the label is swapped，the newly labeled packet is sent.


    正确答案： A,D
    解析： 暂无解析

  • 第10题：

    单选题
    Why is it appropriate to use conditional label advertising when deploying MPLS?（）
    A

    to make CEF tables smaller

    B

    to enable label switching on the frame mode interface

    C

    to restrict MPLS availability to predefined time periods

    D

    to restrict label switching to a limited number of networks

    E

    to restrict end users from seeing the routers in the MPLS network


    正确答案： B
    解析： 暂无解析

  • 第11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 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


    正确答案： D
    解析： 暂无解析

  • 第12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 protocol

    B

    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.


    正确答案： C
    解析： 暂无解析

  • 第13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 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

    正确答案:D

  • 第14题：

    Using more than one label on a single packet is required in what context？（）

    • A、MPLS TE
    • B、MPLS VPN
    • C、When CEF switching and Label switching is done
    • D、In all the above circumstances

    正确答案:B

  • 第15题：

    MPLS需要LDP/TDP，是因为：（）

    • A、MPLS可以需要LDP/TDP，也可以不需要，是可以选择的
    • B、LDP/TDP是转发机制，用于转发带标记数据包（Labeled packet）
    • C、LDP/TDP用于分配MPLS VPN的标记（label）
    • D、LDP/TDP用于交换分配给IP目的的标记（label）

    正确答案:D

  • 第16题：

    在MPLS中，LDP的具体解释（）。

    • A、Label Data Pair
    • B、Label Distribution Pair
    • C、Label Distribution Protocol
    • D、Label Data Protocol

    正确答案:C

  • 第17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 LSR
    • B、TTL propagation cannot be disabled in an MPLS domain
    • C、TTL propagation is only disabled on the ingress edge LSR
    • D、The TTL field of the MPLS label header is set to 255
    • E、The TTL field of the IP packet is set to 0

    正确答案:D

  • 第18题：

    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 payload
    • B、Inserted between the MPLS label stack and the Layer 3 Header
    • C、Inserted between the MPLS label stack and the Layer 2 payload
    • D、Inserted between the MPLS label stack and the Layer 2 header

    正确答案:C

  • 第19题：

    Based on the following output in R1， which statement is true？（）

    • A、If a labeled packet arrives with the top most label of 17， it will be replaced with label 19 and sent out on Ethernet 0/0 interface.
    • B、If a labeled packet arrives with the top most label of 19， it will be replaced with label 17 and sent out on Ethernet 0/0 interface.
    • C、If a labeled packet arrives with the top most label of 17， all the labels will be removed and a clear IP Packet is sent to Next Hop 192.168.0.14 on Ethernet 0/0.
    • D、None of the above.

    正确答案:B

  • 第20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 LSR

    B

    TTL propagation cannot be disabled in an MPLS domain

    C

    TTL propagation is only disabled on the ingress edge LSR

    D

    The TTL field of the MPLS label header is set to 255

    E

    The TTL field of the IP packet is set to 0


    正确答案： D
    解析： 暂无解析

  • 第21题：

    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？（）
    A

    TE label， IGP label， VPN label

    B

    IGP label， TE label， VPN label

    C

    TE label， VPN label， IGP label

    D

    VPN label， IGP label， TE label

    E

    IGP label， VPN label， TE label


    正确答案： E
    解析： 暂无解析

  • 第22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.


    正确答案： E
    解析： 暂无解析

  • 第23题：

    单选题
    Based on the following output in R1， which statement is true？（）
    A

    If a labeled packet arrives with the top most label of 17， it will be replaced with label 19 and sent out on Ethernet 0/0 interface.

    B

    If a labeled packet arrives with the top most label of 19， it will be replaced with label 17 and sent out on Ethernet 0/0 interface.

    C

    If a labeled packet arrives with the top most label of 17， all the labels will be removed and a clear IP Packet is sent to Next Hop 192.168.0.14 on Ethernet 0/0.

    D

    None of the above.


    正确答案： B
    解析： 暂无解析

  • 第24题：

    单选题
    A router receives a packet from a neighbor with an MPLS shim header value of 0.What does the router do with this packet?（）
    A

    It performs a label pop operation and an IP lookup.

    B

    It performs a label swap operation and an IP lookup.

    C

    It sends an error message toward the egress router.

    D

    It sends an error message toward the ingress router.


    正确答案： B
    解析： 暂无解析

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