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H3C Constructing H3C High-Performance Campus Networks Sample Questions:

1. 主机 PCA 的 IP 地址为 40.1.1.1 , MAC 地址为 0011.1111.11 ,接在交换机的 GigabitEthernet1/0/1 口,在交换机上配置了如下命令:
[H3C]vlan 10
[H3C-vlan10]quit
[H3C]vlan 20
[H3C-vlan20]protocol-vlan ipv4
[H3C-vlan20]quit
[H3C]vlan 30
[H3C-vlan30]quit
[H3C]mac-vlan mac-address 0022-2222-2222 vlan 30
[H3C]vlan 40
[H3C-vlan40]ip-subnet-vlan ip 40.1.1.0 255.255.255.0
[H3C-vlan40]quit
[H3C]interface GigabitEthernet 1/0/1
[H3C-GigabitEthernet1/0/1]port link-type hybrid
[H3C-GigabitEthernet1/0/1]port hybrid pvid vlan 10
[H3C-GigabitEthernet1/0/1]port hybrid vlan 10 20 30 40 untagged
[H3C-GigabitEthernet1/0/1]port hybrid protocol-vlan vlan 20 0
[H3C-GigabitEthernet1/0/1]port hybrid ip-subnet-vlan vlan 40
[H3C-GigabitEthernet1 /0/1 ]mac-vlan enable
配置完成后,可以判断 PCA 会加入

A) VLAN20
B) VLAN30
C) VLAN 10
D) VLAN40

2. 下列技术中属于三层组播技术的有

A) IGMP
B) IGMPSnooping
C) MVR
D) PIM

3. 关于 TCNBPDU 的产生,下列说法正确的有

A) 启用 STP 的非根桥交换机如果某端口连接了 PC 机,当该端口进入 Forwarding 状交换机不会产生 TCN BPDU
B) 网络中某交换机的指定端口链路断掉,则该交换机一定会产生 TCNBPDU
C) 当交换机某端口选择为指定端口或根端口时,交换机会立即发送 TCNBPDU
D) 网络中某交换机的 alternate 端口 down 掉,则该交换机不会产生 TCN BPDU

4. 如图所示组网中, RT1 、 RT2 和 RT3 之间运行 PIMSM 协议, RP 为 1.1.1.1 ,且有下游接收者 RT3 上连有组播源,査看 RT3 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 RP 发送注册停止消息后,下列哪些路由器上存在（ S , G )表项

A) RT3
B) RT2
C) RT1

5. 如图组网,交换机均运行 RSTP ,初始时 SWA 、 SWB 和 SWC 互连,当拓扑稳定后连接 SWB 和 SWD ,则下列说法正确的有

A) SWA 收到 TC 置位的 BPDU 后,会将 MAC 地址表全部清空,并从 E0/2 发送 TC 置位的 RSTBPDU
B) SWC 收到 TC 置位的 BPDU 后,会将端口 E0/1 学到的 MAC 地址清空,并从该端口发送 TC 置位的 RST BPDU
C) SWB 会清除端口 E0/1 和 E0/2 学到的 MAC 地址并从这两个端口中发出 TC 置位的 RST BPDU
D) SWB 会在两倍的 HelloTime 时间内发送 TC 置位的 RST BPDU

Solutions: