单选题IGMP Snooping运行在（）层。A物理层B网络层C链路层D应用层
单选题
IGMP Snooping运行在（）层。
A
物理层
B
网络层
C
链路层
D
应用层
参考解析
解析：
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相关考题：
在一个只有二层交换机构成的局域网中,如果在交换机上只启用IGMP Snooping,那么()。 A.组播不通B.组播正常，但IGMP Snooping无法正确记录成员端口信息C.组播正常，IGMP Snooping也可以正确记录组播成员端口信息D.如果同时启用IGMP Spoofing，可以使IGMP Snooping正常工作
对于既支持IGMP同时也支持IGMP snooping的Quidway交换机,下列关于二者配置描述正确的有()。 A.[Quidway-interface-vlan1]igmp enable用于使能IGMP协议;B.[Quidway-vlan1]igmp enable用于使能IGMP协议;C.[Quidway-interface-vlan1]igmp-snooping enable用于使能IGMP snooping;D.[Quidway]igmp-snooping enable用于使能IGMP snooping。
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.
关于IGMP snooping描述正确的是() A.IGMP Snooping解决组播报文在三层广播的问题B.IGMP Snooping运行在链路层，是二层以太网交换机上的组播约束机制，用于管理和控制组播组C.IGMP Snooping通过在监听主机发出的IGMP报文，建立MAC组播地址表D.IGMP Snooping不会消耗交换机的CPU
IGMP协议和IGMP Snoo ping的区别是（）。A、IGMP协议运行在网络层，IGMP Snoo ping运行在链路层B、IGMP协议运行在链路层，IGMP Snoo ping运行在网络层C、IGMP运行在主机和组播路由器之间，用于跟踪、了解主机是哪些组播组的成员D、IGMP Snoo ping工作在二层交换机中，用于将组播报文在二层上进行有目的性转发
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.
在一个只有二层交换机构成的局域网中，如果在交换机上只启用IGMP Snooping，那么（） A、 组播不通B、 组播正常，但IGMP Snooping 无法正确记录成员端口信息C、 组播正常，IGMP Snooping 也可以正确记录组播成员端口信息D、 如果同时启用IGMP Spoofing，可以使IGMP Snooping 正常工作
以下关于组播VLAN的表述，正确的是（）。A、组播VLAN既节省了带宽，又减轻了三层设备的负担B、需要将主机所属的VLAN配置为组播VLAN的子VLANC、组播VLAN需要启用IGMP-Snooping功能D、组播VLAN的子VLAN必须同时启用IGMP-Snooping功能
关于IGMP-Snooping工作原理，正确的是（）。A、二层设备依靠IGMP-slooping侦听IGMP消息，在二层维护组播地址转发表项B、通过侦听IGMPQuery报文，IGMP-Snooping确定路由端口C、通过侦听IGMPReport报文，IGMP-Snooping添加端口到已知组播组或者建立新的组播转发表项
IGMP协议和IGMP Snooping的区别是（）A、IGMP协议运行在网络层，IGMPSnooping运行在链路层B、IGMP协议运行在链路层，IGMPSnooping运行在网络层C、IGMP运行在主机和组播路由器之间，用于跟踪、了解主机是哪些组播组的成员D、IGMPSnooping工作在二层交换机中，用于将组播报文在二层上进行有目的性转发
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.
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.
单选题如果IGMP snooping工作机制描述正确的是（）A如果主机发出IGMP离开报文时，交换机将改主机加入到相应的组播表中B如果主机发出的IGMP主机报告报文时，交换机将删除与该主机对应的组播表项C二层交换机通过不断监听IGMP报文，交换机在二层建立和维护MAC广播地址表D没有运行IGMP Snooping时，组播报文将在二层广播，运行IGMP Snooping后，报文将不再二层广播，而是进行二层组播
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.
多选题关于IGMP snooping描述正确的是（）AIGMP Snooping解决组播报文在三层广播的问题BIGMP Snooping运行在链路层，是二层以太网交换机上的组播约束机制，用于管理和控制组播组CIGMP Snooping通过在监听主机发出的IGMP报文，建立MAC组播地址表DIGMP Snooping不会消耗交换机的CPU
单选题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 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.