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H3C GB0-371 Exam Syllabus Topics:

H3C Constructing H3C High-Performance Campus Networks Sample Questions:

1. 如图,各交换机启用 RSTP ,假设各链路开销值相同,则下列说法正确的

A) 如果将 SWB 和 SWC 的 RSTP 均取消,则 SWA 的端口 E0/2 将会成为 Backup 端口
B) SWB 的端口 E0/1 为 Alternate 端口
C) 如果在 SWB 上取消 RSTP ,则 SWC 的端口 E0/1 将成为根端口
D) 网络计算收敛不需要等待两倍的 ForwardDelay 时间

2. 关于 RSTP 中的端口状态和角色,说法正确的有

A) RSTP 中的根端口和指定端口的定义和 STP 中相同
B) RSTP 中端口共有三种状态,其中端口进入 Learning 状态后开始收发 BPDU ,并确定端口角色
C) RSTP 中 Alternate 端口用于为根端口做备份, Backup 端口用于为指定端口做备份
D) RSTP 中的 Discarding 端口如同 STP 中的 Blocking 端口,端口在 Discarding 状态时不会发送 BPDU ,但会接受 BPDU

3. 关于配置 BPDU 和 TCM BPDU ,说法正确的有

A) 配置 BPDU 仅从指定端口发出, TCNBPDU 仅从根端口发出
B) 配置 BPDU 通常仅由根桥周期性发出, TCNBPDU 除根桥外其他网桥都可能发出
C) 配置 BPDU 通常仅从根端口接收, TCNBPDU 仅从指定端口接收
D) Alternate 端口既不会发送配 BPDU 也不会发送 TCN BPDU

4. 关于 RSTP 和 STP 的计算收敛的对比,说法正确的有

A) 相对于 STP , RSTP 定义了指定端口快速切换机制,这样可以使得指定端口亏阿苏进入转发状态而不需要等待两倍的 Forward Delay 时间
B) 如果 STP 想缩短收敛时间,只能配置较少的 FORWARD Delay 时间,但是可呢过会影响网络的稳定性
C) 相对于 STP , RSTP 定义了根基端口快速切换机制,这样是接主机的端口快速进入转发状态
D) 相对于 STP , RSTP 定义了根基端口快速切换机制,这样是可以使 Altemate 在跟端口障碍时,快速成为新的根端口态

5. 客户的局域网交换机 SWA 双上行连接交换机 SWB 和交换机 SWC ,通过 SmartLink 保证链路可靠性 SWA 交换机有如下配置:
[SWA-smlk-group1]smart-link flush enable control-vlan 10
SWB 交换机有如下配置 ?
[SWB-GigabitEthernet1/0/1]smart-link flush enable control-vlan 100
SWC 交 i 机有如下配置:
[SWC-GigabitEthernet1/0/1]smart-link flush enable control-vlan 100
如果交换机 SWA 交换机 SWB 交换机 SWC 互连接口允许所有 VLAN 通过,从上述信息可以得知

A) 更改 SWB 交换机、 SWC 交换机接收控制 VLAN 为 10 ,则 SWA 交换机 SmartLink 备份功能可正常实现
B) 不需要修改任何配置, SWA 交换机 SmartLink 备份功能可实现
C) 不更改配置,则 SWA 交换机 SmartLink 备份功能无法实现
D) 更改 SWB 交换机、 SWC 交换机接收控制 vlan 为 10 , SWB 交换机、 SWC 交换机通过流量刷新 MAC 和 ARP

Solutions: