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Why are Register messages needed in PIM SM？
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考题
在Quidway系列交换机上开启PIM－SM,其关键配置命令(以VLAN10为例)正确的有()。
A.启动组播路由协议：[Quidway]multicast routing-enableB.在每个VLAN虚接口上配置PIM-SM：[Quidway]pim sm vlan-interface 10C.配置候选BSR：[Quidway-pim]c-bsrvlan-interface 10 24 2D.配置候选RP：[Quidway-pim]c-rpvlan-interface 10
考题
When IP multicast is enabled via PIM, which mode uses the flood and prune metho d? Select the best response.()
A. PIM sparse - denseB. Bidir - PIMC. PIM - RPD. PIM - DME. PIM - SM
考题
关于PIM－DM和PIN－SM两种PIM工作模式描述正确的是()
A.PIM-SM一定需要RPB.PIM-DM是采用“拉”的工作模式工作的C.PIM-SM是采用“推”的工作模式工作的D.PIM-DM适合大型的组播网络结构
考题
PIMSM协议和PIMDM协议的区别是()
A.PIM SM假设网络中有少量接收者，而PIM DM假设网络中存在大量接收者B.BSR/RP仅存在于PIM SM网络中，而PIM DM中不存在C.PIM SM能够实现按需转发，网络中没有冗余流量，而PIM DM周期性泛洪，网络中也不存在冗余流量D.PIM SM存在RPT和SPT树，而PIM DM中仅存在SPT树
考题
下列关于PIM-SM中BSR与RP的表述，正确的有（）。A、—个PIM-SM域中只能有一个BSRB、—个PIM-SM域中只能有一个C-BSRC、一个PIM-SM域中只能有一个RPD、—个PIM-SM域中只能有一个C-RP
考题
In PIM-SM operations， the first router connected to the multicast source sends the Register message towhich device？（）A、Multicast sourceB、Multicast receiverC、RPD、RP mapping agentE、Designated Router （DR）
考题
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 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
考题
Which two statements about RPF checks in Multicast Source Discovery Protocol （MSDP） are true？（）A、It prevents message looping， Session Advertisement （SA）messages must be RPF checkedB、RPF check should be done against the route to the source S of the corresponding PIM-SM domainC、RPF check should be done against the route to the Rendez-vous Point of the corresponding PIM-SM domain，which originated the SAD、RPF checking Session Advertisement （SA） messages will cause message looping
考题
In PIM-SM what control plane signaling must a multicast source perform before it begins to send multicast traffic to a group？（）A、The source must send a PIM Register message to the rendezvous point （RP）B、The source must first join the multicast group using IGMP before sendingC、The source must perform a Request to Send （RTS） and Clear to Send （CTS） handshake with the PIM designated router （DR）D、No control plane signaling needs to be performed；the source can simply begin sending on the local subnet
考题
In PIM-SM operations，to which device does the first router that connects with the multicast source sendthe register message？（）A、RPB、multicast sourceC、IGMP routerD、multicast receiverE、PIM designated router
考题
Which message type is constructed and sent from an MSDP router to its MSDP peers when it receives a PIM register message （knowing that the MSDP router is also configured as an RP for the PIM domain）？（）A、Source-Active MessageB、PIM JoinC、PIM HelloD、MSDP Register
考题
When IP multicast is enabled via PIM, which mode uses the flood and prune metho d? Select the best response.（）A、PIM sparse - denseB、Bidir - PIMC、PIM - RPD、PIM - DME、PIM - SM
考题
Which of these statements about PIM join messages in classic PIM-SM is correct？（）A、PIM join messages are sent every 60 seconds to refresh the upstream router’s mroute state for the multicast tree.B、Routers send a PIM join acknowledgement in response to each PIM join message received from a downstream router.C、PIM join messages are only sent when the multicast distribution tree is first being established.D、PIM join messages are sent every three minutes to refresh the upstream router’s mroute state for the multicast tree.
考题
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.
考题
多选题PIMSM协议和PIMDM协议的区别是（）APIM SM假设网络中有少量接收者，而PIM DM假设网络中存在大量接收者BBSR/RP仅存在于PIM SM网络中，而PIM DM中不存在CPIM SM能够实现按需转发，网络中没有冗余流量，而PIM DM周期性泛洪，网络中也不存在冗余流量DPIM SM存在RPT和SPT树，而PIM DM中仅存在SPT树
考题
单选题Which of these statements about PIM join messages in classic PIM-SM is correct？（）A
PIM join messages are sent every 60 seconds to refresh the upstream router’s mroute state for the multicast tree.B
Routers send a PIM join acknowledgement in response to each PIM join message received from a downstream router.C
PIM join messages are only sent when the multicast distribution tree is first being established.D
PIM join messages are sent every three minutes to refresh the upstream router’s mroute state for the multicast tree.
考题
单选题In PIM-SM operations，to which device does the first router that connects with the multicast source sendthe register message？（）A
RPB
multicast sourceC
IGMP routerD
multicast receiverE
PIM designated router
考题
多选题Which two statements are true about the rendezvo us point (RP) in a multicast network?（）AThe multicast sources must register with the RP to form the multicast distribution tree.BAn RP is required only in networks running Protocol Independent Multicast dense mode (PIM DM).CThe mu lticast receivers must register with the RP to form the multicast distribution tree.DAn RP is required only in networks running Protocol Independent Multicast sparse mode (PIM SM).EAn RP is required only in networks running Protocol Independent Mu lticast sparse - dense mode (PIM - SDM).FTo form the multicast distribution tree, the multicast sources register with and the receivers join the RP.
考题
单选题Which message type is constructed and sent from an MSDP router to its MSDP peers when it receives a PIM register message knowing that the MSDP router is also configured as an RP for the PIM domain？（）A
Source-Active MessageB
PIM JoinC
PIM HelloD
MSDP Register
考题
单选题In PIM-SM what control plane signaling must a multicast source perform before it begins to send multicast traffic to a group？（）A
The source must send a PIM Register message to the rendezvous point （RP）B
The source must first join the multicast group using IGMP before sendingC
The source must perform a Request to Send （RTS） and Clear to Send （CTS） handshake with the PIM designated router （DR）D
No control plane signaling needs to be performed；the source can simply begin sending on the local subnet
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