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H3CSE-RS-SW Sample Questions:

1. 如图所示组网中, RT1 、 RT2 和 RT3 之间运行 PIMSM 协议, RP 为 1.1.1.1RT3 上连有接收者,且在相应接口上使能 IGMP 组播源 2.2.2.2 连接在 RT2 上在 RT3 查看单播路由表如下:
[RT3] display ip routing-table Routing Tables: Public Destinations: 11 Routes: 12Destination/MaskProtoPreCost NextHop Interface
/1.1.1.1/320SPF 10 1562192.168.2.1 so/2/1
|2.2.2.2/320SPF 10 1562192.168.2.1 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 3124192.168.2.1 so/2/1OSPF 10 3124 192.168.0.1 S0/2/0
|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) RT3
C) RT2

2. 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,查看 RT3 单播路由表如下:
[RT3] display ip routing-table Routing Tables: Public Destinations: 10 Routes: 10Destination/MaskProtoPreCost NextHop Interface
/1.1.1.1/320SPF 10 1562 192.168.0.1 S0/2/o
/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 so/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) RT1
B) RT3
C) RT2

3. 关于 MSTP 的 BPDU 格式,说法正确的有

A) MSTI 计算过程中将使用 RSTBPDU 中的定时器值,而不会在每一个 MSTI 配置消息中携带定时器参数
B) 如果交换机没有配置 VLAN 到实例的映射,则 MSTBPDU 中将不会携带任何 MSTI 配置消息
C) MSTI 指定桥优先级字段长度为 8 个字节,包含两个字节的桥优先级以及 6 个字节的桥 MAC 地址
D) MSTI 指定端口优先级字段长度为 2 个字节,包含 1 个字节的端口优先级以及 1 个字节的端口号

4. 运行 PIM-DM 的路由器会周期性发送 Hello 消息,用于发现邻居、建立并维护邻居关系,以下关于 Hello 消息描述正确的有

A) 路由器以组播方式发送 PIM Hello ,目的地址为 224.0.0.13
B) 选举 DR 时,拥有较高 Hello 消息优先级的路由器将成为 DR
C) 所有 PIM 路由器都是 224.0.0.13 的组播组成员
D) 当路由器运行 IGMPV2 时,通过 PIMHello 消息为共享网段选举 DR ,并由 DR 作为 IGMP 的 Querier
E) 如果 Hello 消息优先级相同,接口 IP 地址较大的路由器将成为 DR

5. 狭义的 SDN 包括哪些内容 ? （选择 - 项或多项)

A) VXLAN
B) 强控与弱控
C) OpenFlow 与 Netconf 等南向接口
D) RestFul API 等北向接口

Solutions: