下面不属于IGMP v2和 IGMP v1的区别的是() A.IGMP v2与IGMP v1相比,增加了离开消息B.IGMP v2与IGMP v1相比,增加了特定组查询C.IGMP v2能从指定的组播源接收消息,IGMP vq不能D.IGMP v2和IGMP v1查询器的选举方式不一样
下面不属于IGMP v2和 IGMP v1的区别的是()
A.IGMP v2与IGMP v1相比,增加了离开消息
B.IGMP v2与IGMP v1相比,增加了特定组查询
C.IGMP v2能从指定的组播源接收消息,IGMP vq不能
D.IGMP v2和IGMP v1查询器的选举方式不一样
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(56)以下关于IGMP协议的描述,正确的是( )。A) IGMP运行于主机和与主机直接相连的组播路由器之间B) IGMP实现的功能是单向的C) IGMP v1添加了组成员快速离开的机制D) IGMP v2定义了基本的组成员查询和报告过程
以下关于IGMP协议的描述,正确的是( )。A.IGMP运行于主机和与主机直接相连的组播路由器之间B.IGMP实现的功能是单向的C.IGMP v1添加了组成员快速离开的机制D.IGMP v2定义了基本的组成员查询和报告过程
如果一个网络中既有IGMPv1的路由器也有IGMPv2的路由器。那么IGMP v2路由器的工作状态应该为()。 A.IGMP v2的路由器将工作在IGMP v1的兼容模式,即所发送的协议报文兼容IGMP v1的协议报文格式B.IGMP v2的路由器将工作在IGMP v2的模式下而成为该LAN上的查询器,IGMP v1的路由器则无需处理C.当IGMP v2的路由器检测到网络中的IGMP v1路由器不存在后,将从IGMP v1的兼容模式自动切换到IGMP v2模式工作D.两种不同版本的路由器不能协同工作,需要保证LAN上的路由器工作在同一个版本
IGMP协议经过大力发展和改进,目前已经存在了IGMPv1,v2和v3三个版本,下列关于三个版本说法正确的有()。 A.三个版本的协议规范都有明确的文档进行了规范化描述;B.IGMP v1只定义了基本的成员查询和报告过程;C.IGMP v2在v1的基础上增加了成员快速离开组的机制;D.IGMP v3在v2的基础上主要增加了成员对组播源的主动控制,即成员可以指定接收哪些组播源或不接收哪些组播源的数据流。
下列关于IGMP协议版本说法正确的有()。 A.IGMP v1相对IGMPv2来说,没有定义离开组消息和特定组查询消息,因此IGMP v1的路由器只能通过定时器机制来判断某个组内是否还存在成员;B.IGMP v1没有像v2那样明确定义查询器,所以IGMP v1中同一个LAN上的所有路由器都是查询器;C.IGMP v3增加了指定源和组成员报告消息,所以IGMP v3能够过滤某些源的组播数据流,而只接收特定源的组播数据流;D.IGMP v3同时兼容IGMP v2和IGMP v1,所以IGMP v3中也定义了相关v2和v1中所使用的消息。
如果一个网络中既有IGMP v1的主机也有IGMP v2的主机,而路由器运行IGMP v2。那么网络上的路由器的工作状态应该为()。 A.IGMP v2的路由器将工作在IGMP v1的兼容模式,即所发送的协议报文兼容IGMP v1的协议报文格式B.IGMP v2的路由器将工作在IGMP v2的模式下,IGMP v1的主机无法接收组播数据流C.当IGMP v2的路由器检测到网络中的IGMP v1全部主机离开后,将从IGMP v1的兼容模式自动切换到IGMP v2模式工作D.两种不同版本的路由器和主机不能协同工作,需要保证LAN上的路由器和主机工作在同一个版本
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。
下面是路由器RTD的部分输出信息,关于输出信息描述正确的是?() A.该接口使能的IGMP版本是版本1B.改接口的IGMP状态是down的C.该接口上配置发送IGMP查询消息的时间间隔60sD.该接口上IGMP查询报文中包含的最大响应时间0s
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.
7342 OLT通过PPPoE方式实现IGMP,那么在LT中IGMP应配置何种模式?() SET-PONIGMPSYS::COM::::QUERYINT=,QMAXRESTIME=,ROBUSTNESS=,SRCIPADDR=13.13.13.13,MODE=(),USERVERSIONDEF=v2,NETWVERSIONDEF=v2; ENT-PONIGMPCHN::HSI-1-1-4-1-1-1-1-1::::USERVERSION=v2,USERPRI=4095,PERMDEC=3,PREVPERMDEC=2; SET-PONMCBW::PON-1-1-4-1:::600000;A、HALFPROXYB、STDPROXY
下述关于RG200O-CA 63293的IGMP Proxy功能,描述错误的是:()A、可以选择开启或者关闭IGMP Proxy功能B、IGMP Proxy功能拦截用户和路由器之间的IGMP报文建立组播表C、IGMP Proxy在上联端口执行主机的角色,在下联端口执行路由器的角色D、IGMP Proxy 分析IGMP报文所带的信息,在二层建立和维护MAC组播地址表
下述关于RG200O-CA 6828的IGMP Snooping功能,描述错误的是:()A、可以选择开启或者关闭IGMP Snooping功能B、可以用于组播组的管理和控制C、IGMP Snooping 分析IGMP报文所带的信息,在二层建立和维护MAC组播地址表D、IGMP Snooping在上联端口执行主机的角色,在下联端口执行路由器的角色
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.
单选题使用下列哪一条命令可以显示通过IGMP消息得知的,直连子网中组成员的情况?()Ashow ip igmp interfaceBshow ip igmp routeCshow ip igmp groupDdebug ip igmp