Multicast多对象传播

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Multicast多对象传播

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1.Which three IP multicast group concepts are true?()A. If a packet is sent to a multicast group address, the multicast frame contains the source multicast address.B. A router does not have to be a member of a multicast group to recei ve multicast data.C. A router must be a member of a multicast group to send to the group.D. A router does not have to be a member of a multicast group to send to the group.E. If a packet is sent to a multicast group address, all members of the multic ast group will receive it.F. A router must be a member of a multicast group to receive multicast data.

2.Which two statements are tru e about the rendezvous point (RP) in a multicast network?()A. The multicast sources must register with the RP to form the multicast distribution treeB. An RP is required only in networks running Protocol Independent Multicast dense mode ( PIM DM)C. The multicast receivers must register with the RP to form the multicast distribution treeD. An RP is required only in networks running Protocol Independent Multicast sparse mode (PIM SM)E. An RP is required only in networks running Pro tocol Independent Multicast sparse - dense mode (PIM - SDM)F. To form the multicast distribution tree, the multicast sources register with and the receivers join the RP

3.Refer to the exhibit. All multilayer switches are running PIM dense mode. Recipient A and Recipient B are sending IGMPv2 joi n messages to their respective multilayer switches. Which statement is true?（）A. The Multicast Server is the root of the multicast tree. Switches 1, 3, 4, and 5 will participate in the multicast tree once pruning has taken place.B. The Multicast Serv er is the root of the multicast tree. Switches 4 and 5 will participate in the multicast tree once pruning has taken place.C. Switch 3 is the root of the multicast tree. Switches 3,4, and 5 will participate in the multicast tree once pruning has taken place.D. Switch 3 is the root of the multicast tree. Switches 1,3,4, and 5 will participate in the multicast tree once pruning has taken place.E. Switch 1 is the root of the multicast tree. Switches 1,4, and 5 will participate in the multicast tree once pruning has taken place.F. Switch 1 is the root of the multicast tree. Switches 1,3,4, and 5 will participate in the multicast tree once pruning has taken place.

4.Which three IP multicast address related statements are true?()A.Multicast addresses 224.0.0.13 and 224.0.0.22 are reserved link - local addresses used by PIMv2 and IGMPv3B.Because they would map to overlapping IP multicast MAC addresses, multicast addresses 224.0.1.1 and 238.1.1.1 could not be used toget herC.Multicast addresses 224.0.0.0 through 224.0.0.255 are always forwarded because they are transmitted with Time to Live (TTL) greater than 1D.Multicast addresses 224.0.0.5 and 224.0.0.6 are source multicast addresses for OSPF routersE.The a dministratively scoped multicast addresses 239.0.0.0 through 239.255.255.255 are similar in purpose to RFC 1918 private unicast addressesF.Multicast address 224.0.1.1 has been reserved for the Network Time Protocol (NTP) by the IANA

更多“Multicast多对象传播”相关问题

  • 第1题：

    Which two statements are true about the rendezvous poin t (RP) in a multicast network?()

    A. The multicast sources must register with the RP to form the multicast distribution tree.

    B. An RP is required only in networks running Protocol Independent Multicast dense mode (PIM DM).

    C. The multicast receivers must register with the RP to form the multicast distribution tree.

    D. An RP is required only in networks running Protocol Independent Multicast sparse mode (PIM SM).

    E. An RP is required only in networks running Protocol Independent Multicast sparse - dense mode (PIM - SDM).

    F. To form the multicast distribution tree, the multicast sources register with and the receivers join the RP.


    参考答案：D, F

  • 第2题：

    Which three IP multicast group concepts are true?（）

    • A、If a packet is sent to a multicast group address, the multicast frame contains the source multicast address.
    • B、A router does not have to be a member of a multicast group to receive multicast data.
    • C、A router must be a member of a multicast group to send to the group.
    • D、A router does not have to be a member of a multicast group to send to the group.
    • E、If a packet is sent to a multicast group address, all members of the multicast group will rece ive it.
    • F、A router must be a member of a multicast group to receive multicast data.

    正确答案:D,E,F

  • 第3题：

    When using Overlay Transport Virtualization （OTV）， how do L2 multicast frames traverse the overlay？（）

    • A、 The L2 multicast frames are encapsulated in an OTV packet using the configured control-group multicast address for transport
    • B、 The L2 multicast frames are dropped because multicast cannot be carried across the overlay 
    • C、 The L2 multicast frames are encapsulated in an OTV packet using the configured data-group multicast address for transport
    • D、 The L2 multicast frames are forwarded natively across the overlay based on their multicast IDs

    正确答案:C

  • 第4题：

    Which statement correctly describes a wireless client Layer 2 roam from AP1 to AP2 while joined to a multicast stream using Cisco WLC running v5.2?（）

    • A、Client issues an IGMP join after association with AP2, allowing AP2 to request a multicast stream from  Cisco WLC after AP1 issues an IGMP query.
    • B、Client issues an IGMP join after association with AP2, allowing AP2 to request a multicast stream from  Cisco WLC independent of AP1 multicast member status.
    • C、Client resumes multicast after association with AP2,  because multicast information is sent in mobility  exchanges and AP2 is already a member of the multicast group,  provided that another client has  already joined that multicast.
    • D、Client resumes multicast after association with AP2,  because multicast information is sent in mobility  exchanges and AP2 is already a member of the multicast group,  regardless if any other clients have  already joined that multicast.

    正确答案:D

  • 第5题：

    What is the purpose of the WLC Controller->Multicast->IGMP Timeout feature operating on v5.2?（）

    • A、to determine if there are more clients that are using the multicast stream
    • B、to limit the time that a client has to request an IGMP join to the controller multicast group
    • C、to determine if the multicast router is still alive and responding to multicast clients
    • D、to remove clients from the multicast group if the multicast traffic exceeds the allotted bandwidth allowed  for multicast clients

    正确答案:A

  • 第6题：

    Which two statements are tru e about the rendezvous point (RP) in a multicast network?（）

    • A、The multicast sources must register with the RP to form the multicast distribution tree
    • B、An RP is required only in networks running Protocol Independent Multicast dense mode ( PIM DM)
    • C、The multicast receivers must register with the RP to form the multicast distribution tree
    • D、An RP is required only in networks running Protocol Independent Multicast sparse mode (PIM SM)
    • E、An RP is required only in networks running Pro tocol Independent Multicast sparse - dense mode (PIM - SDM)
    • F、To form the multicast distribution tree, the multicast sources register with and the receivers join the RP

    正确答案:D,F

  • 第7题：

    Which two of these are characteristics of multicast routing？ （）

    • A、 multicast routing uses RPF
    • B、 multicast routing is connectionless.
    • C、 In multicast routing， the source of a packet is known.
    • D、 When network topologies change， multicast distribution trees are not rebuilt， but use the originalpath
    • E、 Multicast routing is much like unicast routing， with the only difference being that it has a a groupof receivers rather than just one destination

    正确答案:A,C

  • 第8题：

    Which two statements are true about the rendezvo us point (RP) in a multicast network?（）

    • A、The multicast sources must register with the RP to form the multicast distribution tree.
    • B、An RP is required only in networks running Protocol Independent Multicast dense mode (PIM DM).
    • C、The mu lticast receivers must register with the RP to form the multicast distribution tree.
    • D、An RP is required only in networks running Protocol Independent Multicast sparse mode (PIM SM).
    • E、An RP is required only in networks running Protocol Independent Mu lticast sparse - dense mode (PIM - SDM).
    • F、To form the multicast distribution tree, the multicast sources register with and the receivers join the RP.

    正确答案:D,F

  • 第9题：

    多选题
    Which three IP multicast group concepts are true?（）
    A

    If a packet is sent to a multicast group address, the multicast frame contains the source multicast address.

    B

    A router does not have to be a member of a multicast group to recei ve multicast data.

    C

    A router must be a member of a multicast group to send to the group.

    D

    A router does not have to be a member of a multicast group to send to the group.

    E

    If a packet is sent to a multicast group address, all members of the multic ast group will receive it.

    F

    A router must be a member of a multicast group to receive multicast data.


    正确答案： A,B
    解析： 暂无解析

  • 第10题：

    名词解释题
    多对象传播

    正确答案： 一组计算机被赋予一个地址的编址方式。对任何发送给该地址的数据包，它的副本都被发送给组中的每一台计算机，经常用于电话或电视会议。
    解析： 暂无解析

  • 第11题：

    单选题
    What is the purpose of the WLC Controller->Multicast->IGMP Timeout feature operating on v5.2?（）
    A

    to determine if there are more clients that are using the multicast stream

    B

    to limit the time that a client has to request an IGMP join to the controller multicast group

    C

    to determine if the multicast router is still alive and responding to multicast clients

    D

    to remove clients from the multicast group if the multicast traffic exceeds the allotted bandwidth allowed  for multicast clients


    正确答案： B
    解析： 暂无解析

  • 第12题：

    单选题
    What is the encapsulation format of an MPLS Multicast VPN （MVPN） packer？（）
    A

    IP unicast in IP unicast

    B

    IP multicast in IP anycast

    C

    IP anycast in IP anycast

    D

    IP multicast in IP unicast

    E

    IP multicast in IP multicast

    F

    IP unicast in IP multicast


    正确答案： B
    解析： 暂无解析

  • 第13题：

    传播的对象分析主要包括

    A.传播对象的心理
    B.传播对象的劝服
    C.传播对象的选择
    D.传播对象的分类
    E.传播对象的知识背景

    答案：A,B
    解析：

  • 第14题：

    Apart from interdomain multicast routing， what else is MSDP used for？（）

    • A、Source Specific Multicast and IGMPv2
    • B、Announcing multicast sources to BGP speakers
    • C、Anycast RP
    • D、Intradomain multicast routing

    正确答案:C

  • 第15题：

    Which two multicast protocol statements are true?（）

    • A、Sparse mode multicast uses a pull model to send multicast traffic to where it is requested
    • B、Dense mode multicast uses a push model to flood traffic throughout the network and then prunes the unwanted traffic
    • C、Dense mode multicast requires explicit join messa ges from their members
    • D、Sparse mode uses reverse path forwarding (RPF) to prune off redundant flows
    • E、The primary use of sparse mode multicast is for test labs and router performance testing

    正确答案:A,B

  • 第16题：

    In computer networking a multicast address is an identifier for a group of hosts that have joined amulticast group. Multicast addressing can be used in the Link Layer （OSI Layer 2）， such as Ethernet Multicast， as well as at the Internet Layer （OSI Layer 3） as IPv4 or IPv6 Multicast. Whichtwo descriptions are correct regarding multicast addressing？（）

    • A、The first 23 bits of the multicast MAC address are 0x01-00-5E. This is a reserved value thatindicates a multicast application
    • B、The last 3 bytes （24 bits） of the multicast MAC address are 0x01-00-5E. This is a reservedvalue that indicates a multicast application
    • C、To calculate the Layer 2 multicast address， the host maps the last 23 bits of the IP address intothe last 24 bits of the MAC address. The high-order bit is set to 0
    • D、The first 3 bytes （24 bits） of the multicast MAC address are 0x01-00-5E. This is a reservedvalue that indicates a multicast application

    正确答案:C,D

  • 第17题：

    Which three IP multicast address related statements are true？ （Choose three.） （） 

    • A、Multicast addresses 224.0.0.0 through 224.0.0.255 are always forwarded because they are transmitted  with Time to Live （TTL） greater than 1.
    • B、Multicast addresses 224.0.0.5 and 224.0.0.6 are source multicast addresses for OSPF routers.
    • C、Multicast addresses 224.0.0.13 and 224.0.0.22 are reserved link-local addresses used by PIMv2 and  IGMPv3.
    • D、Because they would map to overlapping IP multicast MAC addresses， multicast addresses 224.0.1.1  and 238.1.1.1 could not be used together.
    • E、Multicast address 224.0.1.1 has been reserved for the Network Time Protocol （NTP） by the IANA
    • F、The administratively scoped multicast addresses 239.0.0.0 through 239.255.255.255 are similar in  purpose to RFC 1918 private unicast addresses.

    正确答案:C,E,F

  • 第18题：

    多对象传播


    正确答案: 一组计算机被赋予一个地址的编址方式。对任何发送给该地址的数据包，它的副本都被发送给组中的每一台计算机，经常用于电话或电视会议。

  • 第19题：

    Which three IP multicast group concepts are true？ （Choose three.） （）

    • A、 If a packet is sent to a multicast group address， all members of the multicast group will receive it
    • B、 If a packet is sent to a multicast group address， the multicast frame contains the source multicast  address
    • C、 A router does not have to be a member of a multicast group to receive multicast data.
    • D、 A router does not have to be a member of a multicast group to send to the group.
    • E、 A router must be a member of a multicast group to receive multicast data.
    • F、 A router must be a member of a multicast group to send to the group.

    正确答案:A,D,E

  • 第20题：

    What is the encapsulation format of an MPLS Multicast VPN （MVPN） packer？（）

    • A、IP unicast in IP unicast
    • B、IP multicast in IP anycast
    • C、IP anycast in IP anycast
    • D、IP multicast in IP unicast
    • E、IP multicast in IP multicast
    • F、IP unicast in IP multicast

    正确答案:E

  • 第21题：

    多选题
    In computer networking a multicast address is an identifier for a group of hosts that have joined amulticast group. Multicast addressing can be used in the Link Layer （OSI Layer 2）， such as Ethernet Multicast， as well as at the Internet Layer （OSI Layer 3） as IPv4 or IPv6 Multicast. Whichtwo descriptions are correct regarding multicast addressing？（）
    A

    The first 23 bits of the multicast MAC address are 0x01-00-5E. This is a reserved value thatindicates a multicast application

    B

    The last 3 bytes （24 bits） of the multicast MAC address are 0x01-00-5E. This is a reservedvalue that indicates a multicast application

    C

    To calculate the Layer 2 multicast address， the host maps the last 23 bits of the IP address intothe last 24 bits of the MAC address. The high-order bit is set to 0

    D

    The first 3 bytes （24 bits） of the multicast MAC address are 0x01-00-5E. This is a reservedvalue that indicates a multicast application


    正确答案： C,B
    解析： 暂无解析

  • 第22题：

    名词解释题
    Multicast多对象传播

    正确答案： 一组计算机被赋予一个地址的编址方式。对任何发送给该地址的数据包，它的副本都被发送给组中的每一台计算机，经常用于电话或电视会议。
    解析： 暂无解析

  • 第23题：

    多选题
    Which three IP multicast group concepts are true?（）
    A

    If a packet is sent to a multicast group address, the multicast frame contains the source multicast address.

    B

    A router does not have to be a member of a multicast group to receive multicast data.

    C

    A router must be a member of a multicast group to send to the group.

    D

    A router does not have to be a member of a multicast group to send to the group.

    E

    If a packet is sent to a multicast group address, all members of the multicast group will rece ive it.

    F

    A router must be a member of a multicast group to receive multicast data.


    正确答案： F,B
    解析： 暂无解析

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