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H3CSE-RS-SW Sample Questions:

1. 在如图所示的交换网络中,交换机 SWA 上设置 VLAN 10 为 Super VLAN , VLAN2 和 VLAN3 为 VLAN 10 的 Sub VLAN ,端口 Ethernet/0/3 为 Trunk 端口, PVID 为 VLAN1 ,允许所有 VLAN 通过；交换机 SWB 上创建 VLAN2~VLAN20 ,端口 Ethernet/0/4 为 Trunk 端口, PVID 为 VLAN1 ,允许所有 VLAN 通过,按照如图所示设置好各设备的 IP 地址后,在 SWB 上查看 MAC 地址表,可以判断 PCA 属于

A) VLAN2
B) VLAN 10
C) VLAN3
D) VLAN 1

2. 关于生成树保护机制的配置,下列说法正确的有

A) 配置了 TC 保护门限值后,如果设备在默认 10 秒内收到的 TC 报文数超过该门限值,则设备在这 10 秒内将不再进行删除地址表项的操作
B) BPDU 保护需要在指定为边缘端口的端口视图下配置
C) 环路保护命令需要在物理环路上的每一个端口上配置
D) 根桥保护命令在网络中的根桥上配置才会起到保护作用

3. 层级化网络模型的优点包括 _____ 。

A) 降低端到端延迟
B) 增强网络可扩展性
C) 提高网络吞吐量
D) 便于网络的维护

4. 如图组网, SWA 和 SWB 启用 STP SWC 没有启用 STP 初始时链路 2 没有连接, PCB 可以将数据发到 PCA ,如果此时链路 1 故障,维护人员将链路 2 连接,则关于 PCB 到 PCA 数据传送业的恢复过程的说法正确的有（假设 PCA 不会主动发送数据)

A) 由于 SWB 的端口 EO/1 默认需要 30 秒的时间进入转发状态,所以业务需要默认 30 秒的时间才能恢复
B) 业务恢复需要等待 SWC 的 MAC 地址老化,所以需要默认 300 秒的时间
C) 由于 SWA 链路中断会引发拓扑改变处理过程,使得 SWA 和 SWB 的 MAC 地址老化时间缩短,所以业务恢复默认需要 15 秒时间
D) 当 SWB 的端口 EO/1 进入 Forwarding 状态会引发拓扑改变处理过程,所以业务最终恢复需要默认 30+15=45 秒的时间

5. 如果交换机的某个端口下同时开启了基于端口的 VLAN 、基于 MAC 地址的 VLAN 、基于协议的 VLAN 和基于 IP 子网的 VLAN ,则缺省情况下, VLAN 将按照顺序进行匹配

A) MACVLAN 子网 VLAN 协议 VLAN 端口 VLAN
B) 端口 VLAN MACVLAN 协议 VLAN IP 子网 VLAN
C) MACVLAN 端口 VLAN 协议 VLAN 子网 VLAN
D) 端口 VLAN IP 子网 VLAN 端口 VLAN MAC VLAN

Solutions: