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H3C GB0-371 Exam Syllabus Topics:

H3C Constructing H3C High-Performance Campus Networks Sample Questions:

Question 1

关于 MSTP 的基本概念,说法正确的有

A. CIST 是网络中所有交换机计算生成的一棵树,其树根即为网络中的总根
B. CIST 的域根是指某一个域中,优先级最高的交换机
C. CIST 的域根即为某一个域中 IST 的根桥
D. CIST 的总根是网络所有交换机中,桥 ID 最小的交换机

Question 2

关于 IGMP Snooping 正确的有

A. 同一个 VLAN 下既可 & 配置 IGMP ,也可以配置 IGMP Snooping
B. 二层设备上使 iIGMP Snooping 功能,就能够在数据链路层建立并维护组播转发表项,从而在数据链路层正常转发组播数据
C. 端口快速离开是指当交换机从 IGMP Leave 报文时,直接把该端口从对应的转发表项的出端口列表中删除
D. 可以在交换机上启动未知组播组丢弃功能,当交换机收到未知组播数据报文时,只向其路由器端口转发,不在 VLAN 内广播

Question 3

下列关于 PIMSM 共享网段 DR 选举过程的表述,正确的有

A. 选举 DR 时,首先比较 Hello 消息的优先级,拥有最高 Hello 消息优先级的路由器将成为该网段的 DR
B. 选举 DR 后,再选举 BDR ,当 DR 出现故障时, BDR 迅速接替其工作,保障组播流量正常转发
C. 如果 Hello 消息的优先级相同,则共享网段 Routerid 大的路由器将成为该网段的 DR
D. 如果 Hello 消息的优先级相同,则共享网段接口 IP 地址大的路由器将成为该网段的 DR

Question 4

中高端交换机设备自身具备冗余性如果客户网络中某台核心交换机的双主控板主备冗余热备份,交流电源 2 +1 冗余热备份,而风扇系统 1:1 热备份,则下列操作中,可能对客户网络产生重大影响的是

A. 拔出 2 个电源
B. 拔出备用主控板
C. 拔出 1 个风扇
D. 拔出业务板

Question 5

在 PIM-DM 组网中, Assert （断言)消息的比较规则如下

A. 如果到组播源 S 的单播路由优先级相等,且到 S 的路由 Metric 值也相等,则本地接口 IP 地址较大者为胜
B. 到组播源 S 的单播路由优先级较高者获胜
C. 如果到组播源 S 的单播路由优先级相等,那么 S 是路由由 Metric 值较小者获胜
D. 如果以上条件均相等,则 Router ID 较小者获胜

Solutions: