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H3CSE-RS-SW Sample Questions:

1. 关于组播维护命令,正确的有。（选择一项或多项)

A) 组播转发表直接用于指导组播数据的转发,通过查看该表可以了解组播数据的转发状态
B) 通过查看 PIM 路由表项,可以了解（ S , G )或（ * , G )表项的相关信息
C) 通过查看 IGMP 组信息可以了解接口维护的某组播组的相关信息
D) 组播路由表是进行组播数据转发的基础,通过查看该表可以了解（ S , G )表项等的建立情况

2. 在如图所示的组网连接中, SWA/SWB/SWC 在同一个 MSTP 域内并配置相同的域配置。
stp region-configuration
Region-name h3c instance 1 vlan 1 1000
Active region-configuration
三个互联链路的端口都为 trunk ,且通过的 VLAN 如图所示。当互联端口都 UP 且 STP 计算完毕后,下列有关 STP 状态描述正确的有。（选择 - 项或多项)

A) 三台交换机互联的 6 个 trunk 端口在 instance1 内没有 discarding 端口
B) 三台交换机互联的 6 个 trunk 端口在 instance0 内有且仅有一个 discarding 端口
C) 三台交换机互联的 6 个 trunk 端口在 instance1 内有且仅有一个 discarding 端口
D) 三台交换机互联的 6 个 trunk 端口在 instance0 内没有 discarding 端口

3. 在如图所示的交换网络中,交换机 SWA 上设置 VLAN10 为 Super VLAN , VLAN2 和 VLAN3 为 VLAN10 的 Sub VLAN ,端口 Ethernet1/0/3 为 Trunk 端口, PVID 为 VLAN1 ,允许所有 VLAN 通过；交换机 .SWB 上创建 VLAN2~VLAN20 ,端口 Ethernet1/0/4 为 Trunk 端口, PVID 为 VLAN1 ,允许所有 VLAN 通过 SWA 上查看 Ethernet 1/0/3 端口信息,下面显示正确的为

A) [SWA] display interface Ethernet 1/0/3 Ethernet1/0/3 current state: UP ...... PVID: 1 Mdi type: auto Link delay is 0 （ sec ) Port link-type: trunk VLAN passing: 1 （ default vlan ), 2-3 VLAN permitted: 1 （ default vlan ), 2-9 , 11-4094 Trunk port encapsulation: IEEE 802.1q
B) [SWA] display interface Ethernet 1/0/3 Ethernet1/0/3 current state: UP ...... PVID: 1 Mdi type: auto Link delay is 0 （ sec ) Port link-type: trunk VLAN passing: 1 （ default vlan ), 2 VLAN permitted: 1 （ default vlan ), 2-4094 Trunk port encapsulation: IEEE 802.1q
C) [SWA] display interface Ethernet 1/0/3 Ethernet1/0/3 current state: UP ...... PVID: 1 Mdi type: auto Link delay is 0 （ sec ) Port link-type: trunk VLAN passing: 1 （ default vlan ), 2 VLAN permitted: 1 （ default vlan ), 2-9 , 11-4094 Trunk port encapsulation: IEEE 802.1q
D) [SWA] display interface Ethernet 1/0/3 Ethernet1/0/3 current state: UP ...... PVID: 1 Mdi type: auto Link delay is 0 （ sec ) Port link-type: trunk VLAN passing: 1 （ default vlan ), 2-3 , 10 VLAN permitted: 1 （ default vlan ), 2-4094 Trunk port encapsulation: IEEE 802.1q

4. 两台路由器 RTA 和 RTB 通过局域网连接在一起,组成 VRRP 备份组,各接口配置如下 :RTA 的 GigabitEthernet1/0.1 vlan-type dot1 q vid 2
Lp address 192.168.0.252 255.255.255.0
Vrrp vrid 1 virtual-ip 192.168.0.254Vrrp vrid 1 priority 120
RTA 的 GigabitEthernet1/0.2 vlan-type dot1 q vid 3lp address 192.168.1.252 255.255.255.0
Vrrp vrid 2 virtual-ip 192.168.1.254Vrrp vrid 2 priority 120
RTB 的 GigabitEthernet1/0.1 :Vlan-type dot1 q vid 2
Lp address 192.168.0.253 255.255.255.0
Vrrp vrid 1 virtual-ip 192.168.0.254 RTB 的 GigabitEthernet1/0.2: vlan-type dot1 q vid 3lp address 192.168.1.253 255.255.255.0
Vrrp vrid 2 virtual-ip 192.168.1.254
局域网内主机 HostA 、 HostB 的 IP 地址分别为 192.168.0.1 、 192.168.1.1 从上述信息可以得知

A) 备份组使用虚 MAC 方式,则 HostA 、 HostB 学到的网关 MAC 地址不 - 致
B) 备份组使用实 MAC 方式,则 HostA 、 HostB 学到的网关 MAC 地址不 - 致
C) 备份组使用虚 MAC 方式,则 HostA 、 HostB 学到的网关 MAC 地址 - 致
D) 备份组使用实 MAC 方式,则 HostA 、 HostB 学到的网关 MAC 地址一致

5. 关于 IGMP-Snooping 工作原理,正确的是

A) 二层设备依靠 IGMP-sliooping 侦听 IGMP 消息,在二层维护组播地址转发表项
B) 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
C) 通过侦听 IGMPQuery 报文, IGMP-Snooping 确定路由端

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