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H3C Constructing H3C High-Performance Campus Networks Sample Questions:

1. 如图所示组网中, RT1 、 RT2 和 RT3 之间运行 PIM SM 协议, RP 为 1.1.1.1RT3 上连有接收者,且在相应接口上使能 IGMP 在 RT3 査看单播路由表如下:
[RT3]display ip routing-table
Routing Tables: Public
Destinations : 10 Routes : 10
Destination/MaskProtoPreCost NextHop Interface
1.1.1.1/320SPF 10 1562 192.168.2.1 so/2/1
127.0.0.0/8 Direct 00127.0.0.1 InLoopO
127.0.0.1/32Direct 00127.0.0.1 InLoopO
192.168.0.0/30Direct 00192.168.0.2 S0/2/0
192.168.0.1/32Direct 00192.168.0.1 S0/2/0
192.168.0.2/32Direct 00127.0.0.1 InLoopO
192.168.1.0/300SPF 10 3124 192.168.2.1 so/2/1
192.168.2.0/30Direct 00192.168.2.2 so/2/1
192.168.2.1/32Direct 00192.168.2.1 so/2/1
192.168.2.2/32Direct 00127.0.0.1 InLoopO
那么,当接收者（ Receiver )发送组加入请求后,下列哪些路由器上存在（ * , G )表项

A) RT1
B) RT2
C) RT3

2. 关于 VoiceVLAN 的端口过滤模式,说法正确的有

A) VoiceVLAN 的端口过滤模式可以分为安全模式和普通模式两种
B) 对于普通模式下,端口力口入 VoiceVLAN 后设备不再检验报文的 MAC 地址,
C) 安全模式下,设备将对每一个要进入 VoiceVLAN 传输的报文都进行 MAC 匹配检査
D) 缺省情况下, VoiceVLAN 工作在普通模式

3. 在如图所示的交换网络中,交换机 SWA 上设置 VLAN10 为 Isolate-user-vlan VLAN2 和 VLAN3 为 VLAN 10 的 Secondary VLAN ；交换机 SWB 上创建 VLAN2?VLAN20 ,并且设置 VLAN20 为 Isolate-user-vlan , VLAN4 为 VLAN20 的 Secondary VLA 按照如图所示设置好各设备的 IP 地址后,如果在 SWA 和 SWB 上都开启了本地代理 ARP 功能,并且 SWA 和 SWB 都允许发送 ICMP 报文,则在 PCA 上执行命令 tracert 10.1.1.2 , PCA 上将显示需要经过跳才能到达 PCB （请填写阿拉伯数字)

4. 关于 Isolate-user-vlan 和 Super VLAN 的配置,下面描述正确的是

A) SuperVLAN 接口开启本地代理 ARP 功能后可以实现不同 SubVLAN 内的 i 机互通
B) Isolate-user-vlan 接口上开启本地代理 ARP 功能后可以实现不同 SecondaryVLAN 内的主机互通
C) 建立 SuperVLAN 和 Sub VLAN 映射关系后,系统将禁止向 Sub VLAN 中添加 / 删除端口以及刪除 VLAN 的操作
D) 建立 Isolate-user-vlan 和 Secondary VLAN 映射关系后,系统将禁止向 Secondary VLAN 中添加 / 删除端口以及删除 VLAN 的操作

5. 如图组网, SWA 和 SWD 启用 RSTP ,而 SWB 和 SWC 没有启用生成树协议,则下列说法正确的有

A) 当 SWB 的端口 E0/2DOWN 掉后, SWD 的端口 E0/2 会等待 3 个 Hello Time 后才会成为新的根端口并进入转发状态
B) SWD 将会有一个端口的角色为 Alternate
C) 当 SWB 的端口 E0/2DOWN 掉后, SWD 的端口 E0/2 会成为新的根端口并立即进入转发状态
D) 由于 SWB 和 SWC 没有启用生成树协议,所以当 SWD 的根端口 DOWN 掉后, Alternate 端口不能马上成为新的根端口并进入转发状态

Solutions: