A.接收者主机仅支持IGMPV3协议,但网络中使用的是SSM组播模型
B.网段上有大量接收者主机,路由器会收到大量的IGMP report报文的问题
C.解决组播数据报文在2层设备上广播问题,用于管理和控制组播数据报文的转发
D.IGMP Report报文合法性问题
第1题:
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.
第2题:
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
第3题:
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
第4题:
IGMP Snooping 不能在三层交换机上使用。
第5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?()
第6题:
A.错误
B.正确
第7题:
在分布式IGMP组播模式下,ONU的工作模式为?
第8题:
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。
第9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()
第10题:
关于IGMP-Snooping工作原理,正确的是()。