问答题what is multicast snooping？
问答题
what is multicast snooping？
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解析：
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相关考题：
What is the use of MSDP across multiple PIM domains?() A. It scopes multicast traffic.B. It prevents multicast routing loops.C. It advertises active multicast sources.D. It advertises RPs to all downstream routers.
Which two statements are true about Internet Group Management Protocol (IGMP) snooping?() A. IGMP snooping and Cisco Group Membership Protocol (CGMP) can be used simultaneously on a switch.B. IGMP snooping a nd Cisco Group Membership Protocol (CGMP) were developed to help Layer 3 switches make intelligent forwarding decisions on their own.C. IGMP snooping examines IGMP join/leave messages so that multicast traffic is forwarded only to hosts that sent an IG MP message toward the router.D. IGMP snooping is an IP multicast constraining mechanism for Layer 2 switches.E. IGMP snooping is enabled with the ip multicast - routing global configuration command.
When building an IP multicast domain using PIM which mode assumes that other routers do not want to forward multicast packets for the group?() A. PIM - DMB. PIM - SMC. PIM - RPD. CGMPE. IGMP snooping
When building an IP multicast domain using PIM which mode assumes that other routers do not want to forward multicast packets for the group?（）A、PIM - DMB、PIM - SMC、PIM - RPD、CGMPE、IGMP snooping
Apart from interdomain multicast routing， what else is MSDP used for？（）A、Source Specific Multicast and IGMPv2B、Announcing multicast sources to BGP speakersC、Anycast RPD、Intradomain multicast routing
What is the purpose of IGMP in a multicast implementation？（）A、 it is not used in multicastB、 it determines the virtual address group for a multicast destinationC、 it dynamically registers individual hosts in a multicast group on a specific LAND、 it is used on WAN connections to determine the maximum bandwidth of a connectionE、 it determines whether Bidirectional PIM or PIM sparse mode will be used for a multicast flow
Nexus# sh ip igmp snooping vlan 120 IGMP Snooping information for vlan 120 IGMP snooping disabled Optimised Multicast Flood （OMF） disabled IGMP querier none Switch-querier enabled， address 1.1.1.1， currently not running IGMPv3 Explicit tracking enabled IGMPv2 Fast leave disabled IGMPv1/v2 Report suppression enabled IGMPv3 Report suppression disabled Link Local Groups suppression enabled Router port detection using PIM Hellos， IGMP Queries Number of router-ports： 0 Number of groups： 0 Active ports： Po100 Po111 Which statement best describes what is depicted in the show command output？（）A、 IGMP snooping is not active for VLAN 120 because the IGMP feature has not been enabled on the switch with the feature igmp command.B、 The IGMP snooping querier for VLAN 120 is not in a running state because the Loopback interface configured with 1.1.1.1/32 is currently in a down state.C、 IGMP snooping has been disabled on the VLAN 120 SVI.D、 IGMP snooping has been disabled for VLAN 120 in VLAN configuration mode.E、 IGMP snooping is not active for VLAN 120 because VLAN 120 does not exist in the VLAN database.
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 streamB、to limit the time that a client has to request an IGMP join to the controller multicast groupC、to determine if the multicast router is still alive and responding to multicast clientsD、to remove clients from the multicast group if the multicast traffic exceeds the allotted bandwidth allowed for multicast clients
Which statement best describes what is depicted in the show command output？（）A、 IGMP snooping is not active for VLAN 120 because the IGMP feature has not been enabled on the switch with the feature igmp command.B、 The IGMP snooping querier for VLAN 120 is not in a running state because the Loopback interface configured with 1.1.1.1/32 is currently in a down state.C、 IGMP snooping has been disabled on the VLAN 120 SVI.D、 IGMP snooping has been disabled for VLAN 120 in VLAN configuration mode.E、 IGMP snooping is not active for VLAN 120 because VLAN 120 does not exist in the VLAN database.
What is the purpose of a rendezvous point (RP)?（）A、acts as a meeting place for sources and receivers of multicast trafficB、used in PIM dense m ode to create a database of all multicast sourcesC、used in PIM dense and sparse mode to create a database of all multicast sourcesD、acts as the designated router for a broadcast segment when multicast routing is enabled
Which two statements are true about Internet Group Management Protocol (IGMP) snooping?（）A、IGMP snooping and Cisco Group Membership Protocol (CGMP) can be used simultaneously on a switch.B、IGMP snooping a nd Cisco Group Membership Protocol (CGMP) were developed to help Layer 3 switches make intelligent forwarding decisions on their own.C、IGMP snooping examines IGMP join/leave messages so that multicast traffic is forwarded only to hosts that sent an IG MP message toward the router.D、IGMP snooping is an IP multicast constraining mechanism for Layer 2 switches.E、IGMP snooping is enabled with the ip multicast - routing global configuration command.
What is the encapsulation format of an MPLS Multicast VPN （MVPN） packer？（）A、IP unicast in IP unicastB、IP multicast in IP anycastC、IP anycast in IP anycastD、IP multicast in IP unicastE、IP multicast in IP multicastF、IP unicast in IP multicast
What is the use of MSDP across multiple PIM domains？（）A、It scopes multicast traffic.B、It prevents multicast routing loops.C、It advertises active multicast sources.D、It advertises RPs to all downstream routers.
单选题Nexus# sh ip igmp snooping vlan 120 IGMP Snooping information for vlan 120 IGMP snooping disabled Optimised Multicast Flood （OMF） disabled IGMP querier none Switch-querier enabled， address 1.1.1.1， currently not running IGMPv3 Explicit tracking enabled IGMPv2 Fast leave disabled IGMPv1/v2 Report suppression enabled IGMPv3 Report suppression disabled Link Local Groups suppression enabled Router port detection using PIM Hellos， IGMP Queries Number of router-ports： 0 Number of groups： 0 Active ports： Po100 Po111 Which statement best describes what is depicted in the show command output？（）A IGMP snooping is not active for VLAN 120 because the IGMP feature has not been enabled on the switch with the feature igmp command.B The IGMP snooping querier for VLAN 120 is not in a running state because the Loopback interface configured with 1.1.1.1/32 is currently in a down state.C IGMP snooping has been disabled on the VLAN 120 SVI.D IGMP snooping has been disabled for VLAN 120 in VLAN configuration mode.E IGMP snooping is not active for VLAN 120 because VLAN 120 does not exist in the VLAN database.
单选题What is the encapsulation format of an MPLS Multicast VPN （MVPN） packer？（）AIP unicast in IP unicastBIP multicast in IP anycastCIP anycast in IP anycastDIP multicast in IP unicastEIP multicast in IP multicastFIP unicast in IP multicast
多选题Which two restrictions must the Enterprise Campus network designer consider when evaluatingWAN connectivity options？ （）AOSPF over multicast EMS or VPLS network may not have consistent broadcast or multicastperformanceBIP multicast is not supported over Lover 3 MPLS VPN； instead a Layer 2 MPLS WN must beutilized with service provider supportCQoS requirements with MPLS-VPN must be implemented by the service providerDHierarchical VPLS designs are the least scalableEIGMP snooping is not on option with VPLS or EMS； instead administrative scoping or allowingsufficient bandwidth for unnecessary multicast traffic at the edge links is required
单选题What is the purpose of IGMP in a multicast implementation?（）Ait is not used in multicastBit determines the virtual address group for a multicast destinationCit dynamically registers individual hosts in a multicast group on a specific LANDit is used on WAN connections to determine the maximum bandwidth of a connectionEit determines whether Bidirectional PIM or PIM sparse mode will be used for a multicast flow
单选题What is the purpose of the WLC Controller-Multicast-IGMP Timeout feature operating on v5.2?（）Ato determine if there are more clients that are using the multicast streamBto limit the time that a client has to request an IGMP join to the controller multicast groupCto determine if the multicast router is still alive and responding to multicast clientsDto remove clients from the multicast group if the multicast traffic exceeds the allotted bandwidth allowed for multicast clients
单选题What is the minimum configuration you must do in order to enable multicast support on the CiscoWireless LAN Controller v5.2?（）AEnable the IGMP snooping capability and define the IGMP timeout period.BSet the Ethernet multicast mode to Enabled， enable the IGMP snooping capability， and define the IGMP timeout period.CSet the multicast monitor function to Enabled， enable the IGMP snooping capability， and define the mandatory data rate to the minimum value supported.DSet the Ethernet multicast mode to Multicast and define the multicast group address.
单选题When building an IP multicast domain using PIM which mode assumes that other routers do not want to forward multicast packets for the group?（）APIM - DMBPIM - SMCPIM - RPDCGMPEIGMP snooping