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H3CSE-RS-SW Sample Questions:

1. 如图组网, SWA 和 SWC 启用 STPSWC 为根, SWB 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 数据传送业务的恢复过程说法正确的有（假设 PCA 不会主动发送数据)

A) 该情况下,默认 15 秒后, PCB 到 PCA 的业务即可恢复
B) SWA 会产生 TCNBPDU 并通知 SWC , SWC 会发送 TC 置位的配置 BPDU ,此后一段时间 SWC 和 SWA 的 MAC 地址老化时间将变为 Forward Delay 时长
C) 由于 SWB 没有启用 STP ,则 PCB 到 JPCA 业务恢复默认需要 300 秒的时间
D) SWB 的端口 EO/1 可以立即进入转发状态,不需要延迟

2. 为了指导网络设备厂家正确实现设备的管理, ISO 定义了网络管理的五大功能,其中 SNMP 网络管理系统实现了哪些功能 ? （选择 - 项或多项)

A) 性能管理
B) 配置管理
C) 拓扑管理
D) 故障管理
E) 设备管理

3. 关于 VoiceVLAN 的端口过滤模式,说法正确的有

A) 缺省情况下, VoiceVLAN 工作在普通模式
B) VoiceVLAN 的端口过滤模式可以分为安全模式和普通模式两种
C) 安全模式下,设备将对每一个要进入 VoiceVLAN 传输的报文都进行 MAC 匹配检杳
D) 对于普通模式下,端口力口入 VoiceVLAN 后设备不再检验报文的 MAC 地址,

4. 主机 PCA 的 IP 地址为 40.1.1.1 , MAC 地址为 0011.1111.1111 ,连接在交换机 SWA 的 GigabitEthernet1/0/1 端口上,在交换机 SWA 上配置了如下命令:
[SWA] vlan 10
[SWA-vlan10] quit
[SWA] vlan 20
[SWA-vlan20] protocol-vlan ipv4
[SWA-vlan20] quit
[SWA] vlan 30 [SWA-vlan30] quit
[SWA] mac-vlan mac-address 0011-1111-1111 vlan 30
[SWA] vlan 40
[SWA-vlan40] ip-subnet-vlan ip 50.1.1.0 255.255.255.0
[SWA-vlan40] quit
[SWA] interface GigabitEthernet 1/0/1
[SWA-GigabitEthernet1/0/1] port link-type hybrid
[SWA-GigabitEthernet1/0/1] port hybrid pvid vlan 10
[SWA-GigabitEthernet1/0/1] port hybrid vlan 10 20 30 40 untagged
[SWA-GigabitEthernet1/0/1] port hybrid protocol-vlan vlan 20 0
[SWA-GigabitEthernet1/0/1] port hybrid ip-subnet-vlan vlan 40
[SWA-GigabitEthernet1/0/1] mac-vlan enable
[SWA-GigabitEthernet1/0/1] vlan precedence ip-subnet-vlan
配置完成后,可以判断 PCA 会加入

A) VLAN 20
B) VLAN 30
C) VLAN 10
D) VLAN 40

5. 二台路由器通过局域网连接在一起,组成 VRRP 备份组,各接口上配置如下:
[RTA-GigabitEthernet1/0] display this
Ip address 192.168.0.252 255.255.255.0
Vrrp vrid 1 virtual-ip 192.168.0.254
Vrrp vrid 1 priority 120 vrrp vrid 1 preempt-mode
Vrrp vrid 1 track interface serial0/1 reduced 30
[RTB-GigabitEthernet1/0] display this
Ip address 192.168.0.253 255.255.255.0
Vrrp vrid 1 virtual-ip 192.168.0.254 vrrp vrid 1 preempt-mode
若网络运行中, RTA 串口 Serial0/1 发生了一次 DOWN/UP 事件,则可以得知

A) 在 RTA 串口 Serial0/1 DOWN/UP 时间段内,响应局域网 PC ARP 请求的路由器不会改变
B) 在 RTA 串口 Serial0/1 DOWN/UP 时间段内,响应局域网 PC ARP 请求的路由器改变 1 次
C) 在 RTA 串口 Serial0/1 DOWN/UP 时间段内,响应局域网 PC ARP 请求的路由器改变 3 次
D) 在 RTA 串口 Serial0/1 DOWN/UP 时间段内,响应局域网 PC ARP 请求的路由器改变 2 次

Solutions: