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H3CSE-RS-SW Sample Questions:

1. 关于 MSTP 的基本概念,说法正确的有

A) 一个 MSTI 实例可以映射多个 VLAN ,不同 MST 域中的 VLAN 映射关系可以不同
B) IST 是 CIST 在 MST 域内的一个片断, IST 的根为 MST 域内优先级最高的桥
C) IST 的根为 IST 中距离总根最近的桥
D) 一个 MST 域可以包含多个 MSTI 实例,不同的 MST 域可以包含不同的 MSTI 实例

2. 关于 RSTP 和 STP 的关系,说法正确的有

A) RSTP 可以在 STP 的基础之上实现不同 VLAN 的数据在 Trunk 链路上的负载分担
B) 运行 RSTP 的交换机可以和运行 STP 的交换机协同工作,并改善 STP 的收敛时间
C) RSTP 具备 STP 的所有功能,但其仅使用了一种类型的 BPDU
D) RSTP 在旧 EE802.1 D 标准中定义,其协议思想和 STP 相同,但在收敛时间上作了改进

3. 路由器的单播路由表如下:
<H3C>display ip routing-table Routing Tables: Public Destinations: 9Routes: 9
Destination/MaskProtoPreCost NextHop Interface 10.1.1.0/30 Direct 0010.1.1.2 S0/2/0
10.1.1.0/30 Direct 00 10.1.1.2 S0/2/0
10.1.1.1/32 Direct 00 10.1.1.1 S0/2/0
|10.1.1.2/32 Direct 00 127.0.0.1 InLoop 0
11.1.1.0/30 Direct 00 11.1.1.1 Eth0/1/0
11.1.1.1/32 Direct 00 127.0.0.1 InLoop 0
|12.1.1.0/30 Direct 00 12.1.1.1Eth0/1/1
|12.1.1.1/32 Direct 00 127.0.0.1 InLoop 0
13.1.1.0/30 Direct 00 13.1.1.1Eth0/1/2/
13.1.1.1/32 Direct 00 127.0.0.1 InLoop 0
100.1.1.0/240 SPF 10 156310.1.1.1 S0/2/0
127.0.0.0/8 Direct 00 127.0.0.1 InLoop 0
127.0.0.1/32 Direct 00 127.0.0.1 InLoop 0
200.1.1.0/240 SPF 10 212.1.1.2 Eth0/1/1
那么,接收者（ Receiver )会收到的组播数据为

A) （ 100.1.1.1 , 226.1.1.1 )
B) （ 200.1.1.1 , 226.2.2.2 )
C) （ 100.1.1.1 , 226.3.3.3 )

4. 在 SDN 网络中,登录一台 Overlay 边缘设备,输入命令 "display openflow instance 1 controller" ,回显如下,从回显信息中能做出的正确推断是 : （选择 - 项或多项)

A) Controller 2Controller role" Master" ,说明 Controller 2 集群主 Leader
B) 两台 Controller 之间的保活报文发送间隔为 5s
C) 以上选项均正确
D) 两台 Controller 的 Connect state 都是 "Established" ,证明当前 OpenFlow 连接是正常的

5. 通过查看 IGMP 组信息,可以了解到的内容有

A) 组播组第一个发送 Report 报文的主机地址
B) 组播组 IGMP 查询器
C) 路由器维护的组播组信息
D) 组播组 Report 报文个数

Solutions: