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H3C Constructing H3C High-Performance Campus Networks Sample Questions:

1. 主机 PCA 的 IP 地址为 40.1.1.1 , MAC 地址为 0011.1111.1111PCA 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 40.1.1.0 255.255.255.0
[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
配置完成后,可以判断 PCA 会加入

A) VLAN30
B) VLAN40
C) VLAN 10
D) VLAN20
E) 配置命令有误

2. 客户的二台交换机 SWA 、 SWB 通过七根以太网线连接在一起,并配置了动态链路聚合,交换机 SWA 上对应端口 Ethernet 1/0/1 , Ethernet 1/0/2 、 Ethernet 1/0/3 、 Ethernet 1/0/4 、 Ethernet 1/0/5 、 Ethernet 1/0/6 、 Ethernet 1/0/7o 如果交换机 SWA 、 SWB 每个聚合组只支持 6 个端口,且 SWA 交换机有如下配置:
[SWA]interface Ethernet 1/0/7
[SWA-Ethernet1/0/7]lacp port-priority 4096
设备上査看 LACP 状态 : 输出信肩 : 如下:
[SWA]display lacp system-id
Actor System ID: 0x8000, 00e1-fc00-5000
[SWB]display lacp system-id
Actor System ID: 0x8000, 00e0-fc43-7384
如果更改 SWA 的 LACP 系统优先级为 4096 ,从上述信息可以得知

A) 在各端口配置一致的情况下, Ethernet1/0/6 端口为聚合组 Unselected 端口
B) 在各端口配置一致的情况下, Ethernet1/0/1 端口为聚合组 Unselected
C) 在各端口配置一致的情况下, SWA 在端口 Ethem 射 1/0/1 至 Ethernet 1/0/6 这六个端口中随机选择一个端口为聚合组 UnselectM
D) 在各端口配置一致的情况下, Ethernet1/0/7 端口为聚合组 Unselected 端口

3. 在如图所示的交换网络中,交换机 SWA 上设置 VLAN10 为 Isolate-userW VLAN2 和 VLAN3 为 VLAN 10 的 Secondary VLAN ；交换机 SWB 上创建 VLAN2-VLAN20 ,并且设置 VLAN20 为 Isolate-user-vlan , VLAN4 为 VLAN20 的 Secondary VLA 按照如图所示设置好各设备的 IP 地址后,下面说法正确的是（选择一项或多项)

A) SWB 的报文从 SWA 的 GigabitEthem1/0/3 端口进入,从 GigabitEthem1/0/1 端口出 i 后所带的 VLAN Tag 为 VLAN 10
B) PCA 的报文从 SWA 的 GigabitEthem1/0/3 端口出来,进入 SWB 的 GigabitEthem1/0/4 端口后所带的 VLAN Tag 为 VLAN 10
C) PCA 的报文从 SWA 的 GigabitEthem1/0/1 端口进入,从 GigabitEthem1/0/3 端口出来后所带的 VLAN Tag VLAN 1
D) SWB 访问 PCA 时,报文从 SWB 的 GigabitEth1/0/4 不带 VLAN Tag

4. 关于生成树协议中定时器的配置,说法正确的有

A) 应该将 MaxAge 调为最小值,这样可以缩短 BPDU 的老化时间,及时发现链路故障
B) 适当的 Helloinme 值,可以满足降低生成树计算损耗的同时增强生成树的健壮性,取值过大或过小都会对生成树计算产生和网络的稳定产生影响
C) 不建议手工配置 Hello Forward Delay 和 Max Age ,交换机会通过网络直径值自动为定时器设置较优的值
D) 应该将 HelloTime 调为最大值,将 Forward Delay 调为最小值,这样可以减少网络中的 Hello 消息数量,并且端口可以尽快进入转发状态

5. 关于 RP 和 BSR ,下列说法正确的有

A) BSR 负责在 PIM-SM 域 i 收集并发布 RP 信息
B) PIM-SM 中 RP 可以通过手工指定,也可以通过动态选举
C) 配置 RP 通过动态选举时,可以把有意成为 RP 的路由器配置为 C-RP
D) 在一个 PIM-SM 域中只能有一个 BSR

Solutions: