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H3C Constructing H3C High-Performance Campus Networks Sample Questions:

1. 在交换机 SWA 上执行 display interface Ethernet 1/0/2 命令后,输出信息如下 :
[SWA]display interface Ethernet 1/0/2
Ethernet1/0/2 current state: UP
PVID: 10
Mdi type: auto
Link delay is 0(sec)
Port link-type: trunk
VLAN passing: 1 (default vlan), 10
VLAN permitted: 1 (default vlan), 2-4094
Trunk port encapsulation: IEEE 802.1q
Port priority: 0
从以上输出可以判断

A) 带有 VLAN1 标签的数据帧离开端口 Ethernet1/0/2 时不会被剥离标签
B) 当前交换机存在的 VLAN 只有 VLAN1 和 VLAN10
C) 端口 Ethernet1/0/2 只允许 VLAN 1 和 VLAN 10 的数据侦通过
D) 带有 VLAN20 标签的数据帧进入端口 Ethernet1/0/2 时将被丢弃

2. 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

3. 以下哪些协议是运行在路由器和路由器之间的组播路由协议 -

A) MOSPF
B) DVMRP
C) IGMPV2
D) PIM
E) MLD

4. 下面关于交换机 VLAN 间通信说法正确的是

A) RSTP 和 MSTP 均要求上游设备的指定端口在接收到下游设备的 Agreement 报文后才能进行快速迁移
B) 通过在端口配置 stp no-agreement-check , MSTP 交换机将不会检查上游发送的 Proposal BPDU 中是否将 Agreement 位置位
C) 图中,默认情况下 SWA 的端口 E1/0/1 需要等待两倍的 Forward Delay 时长才可以进入 Forwarding 状态
D) RSTP 中,下游设备只有在收到上游设备发送的 Proposa 和 Agreement 均置为的 BPDU ,才会回应 Agreement 置为的 BPDU

5. 交换机 SWA 、 SWB 通过二根光纤千兆以太网链路连接在一起,其中交换机 SWA 上有如下接口配置:
[SWA]interface GigabitEthernet 1/0/1
[SWA-GigabitEthernet1/0/1]port link-type trunk
[SWA-GigabitEthernet1/0/1]port trunk permit vlan 1 10 100
[SWA]interface GigabitEthernet 1/0/2
[SWA-GigabitEthernet1/0/2]port link-type trunk
[SWA-GigabitEthernet1/0/2]port trunk permit vlan 1 10
若要配置链路聚合将这两条链路聚合在一起。如果 SWB 上配置是正确的,从上述信息可以得知

A) 不需要更改允许通过的 VLAN 配置, GigabitEthernet1/0/1 和 GigabitEthernet 1/0/2 就可以加入同一个聚合组
B) 在 SWA 和 SWB 上都配置了链路聚合后,若交换机 SWA 和 SWB 开启 MSTP ,则 GigabitEthe1/0/1 和 GigabitEthernet 1/0/2 的 MSTP 端口状态一致
C) 因为允许通过的 VLAN 不同, GigabitEthe1/0/1 和 GigabitEthe1/0/2 无法加入同一个聚合组
D) 只有将 GigabitE1/0/2 的配置改为与 GigabitEthe1/0/1 一致,二者才可以加入同一个聚合组

Solutions: