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H3C GB0-371 Exam Syllabus Topics:

H3C Constructing H3C High-Performance Campus Networks Sample Questions:

1. 二台交换机 SWA 、 SWB 通过四根以太网线连接在一起,其中交换机 SVVA 上对应接口有如下配置:
[SWA-Ethernet1/0/1]display this
duplex full
speed 10
[SWA-Ethernet1/0/2]display this
duplex full
speed 10
[SWA-Ethernet1/0/3]display this
duplex half
speed 100
[SWA-Ethernet1/0/4]display this
duplex half
speed 100
从上述信息可以得知

A) 四个以太网口通过静态聚合加入同一个聚合组, Selected 端口为 Ethernet1/0/1 和 Ethernet1/0/3
B) 四个以太网口通过静态聚合加入同一个聚合组, Selected 端口为 Ethernet1/0/1 和 Ethernet1/0/2
C) 四个以太网口通过静态聚合加入同一个聚合组, Selected 端口为全部四个端口
D) 四个以太网口通过静态聚合加入同一个聚合组, Selected 端口为 Ethernet1/0/3 和 Ethernet1/0/4

2. 下列关于 PIM SM 注册抑制定时器的表述,正确的有（选择一项或多项)

A) 为避免注册抑制定时器超时, DR 会在定时器超时前,将封装了组播数据的 Register 消息发往 RP
B) 组播源的 DR 路由器会维护一个注册抑制定时器,若定时器超时, DR 会向 RP 单播组播源注册消息
C) RP 收到 DR 的注册消息后,会发送注册停止消息,并更新本地的（ S , G )和（ * , G )表项
D) DR 收到注册停止消息后,会更新注册抑制定时器,并继续以组播方式发送数据

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) 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
C) 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
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. 下列关于 PIMSM 中 BSR 和 RP 作用的表述,正确的有

A) 若 PIM-SM 域没有 BSR ,则 RP 信息无法扩散,组播接收者无法正常加入,组播流量无法正常转发
B) RP 是组播接收者加入某组播组的汇聚点
C) BSR 控制 RP 信息的收集与传播,是 PIM-SM 域的管理核心
D) RP 是组播源转发组播流量的中转站

5. 下列关于组播路由协议的表述,正确的有

A) 域内组播路由协议包括: MSDP 、 DVMRP 、 MOSPF 、 PIM
B) 在密集模式下,组播数据流采用推的方式从组播源泛洪发送到网络的每个角落,组播接收者被动的接收组播报文
C) 在稀疏模式下,组播数据流采用拉的方式从组播源发送到组播接收者,组播接收者主动发送接收请求
D) 组播路由协议有密集和稀疏两种模式

Solutions: