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H3C Constructing H3C High-Performance Campus Networks Sample Questions:

1. 客户二台交换机 SWA , SWB 通过局域网连接在一起,二台交换机 SWA 、 SWB 组成链路聚合组在 SWA 上査看聚合组状态如下:
[SWA]display link-aggregation verbose
Loadsharing Type: Shar -- Loadsharing, NonS -- Non-Loadsharing
Port Status: S -- Selected, U -- Unselected
Flags:A -- LACP_Activity, B -- LACP_Timeout, C -- Aggregation,
D -- Synchronization, E -- Collecting, F -- Distributing,
G -- Defaulted, H -- Expired
System ID: 0x8000, 000f-e245-6bc0
Local:
Port StatusPriority Oper-KeyFlag
GE1/0/1S 327682 {ACDEF}KOKOMADE
GE1/0/2S 327682 {ACDEF}KOKOMADE
GE1/0/3S 327682 {ACDEF}KOKOMADE
Remote:
ActorPartner Priority Oper-KeySystemID Flag
GE1/0/125327682 0x8000, 000f-e23d-59f0 {ACDEF}KOKOMADE
GE1/0/226327682 0x8000 000f-e23d-59f0 {ACDEF}KOKOMADE
GE1/0/327327682 0x8000 000f-e23d-59f0 {ACDEF}KOKOMADE
从上述信息可以得知

A) 交换机 SWA 和交换机 SWB 之间建立的是动态聚合组
B) 链路聚合端口带宽大小 2G
C) 交换机 SWA 和交换机 SWB 之间建立的是静态聚合组
D) LACP 优先级为 0x8001

2. 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) VLAN30
B) VLAN40
C) VLAN20
D) VLAN 10

3. 客户局域网交换机 SWA 、 SWB 、 SWC 上构成 RRPP 环主环 1 ,交换机 SWB 上有如下配置信息:
[SWB]rrpp domain 1
[SWB-rrpp-domain1]ring 1 node-mode transit primary-port gigabitethernet 2/0/1 secondary-port gigabitethernet 2/0/2 level 0
如果交换机 SWA 为主环 1 主节点,如果交换机 SWB 端口 GigabitEthem2/0/1 故障,从上述信息可以得知

A) 交换机 SWA 将发送 Common-Flush 报文通知所有传输节点
B) 交换机 SWA 立即将状态切换到 Failed 状态,放开副端口
C) 如果交换机 SWB 发现端口 GigabitEthernet 2/0/1 口重新 Up 后,立即解除该端口的阻塞状态
D) SWA 将发送 Link-Down 报文通知所有节点

4. 客户要求核心交换机采用以太网链路聚合技术,则

A) 聚合端口是物理端口,需要采购以太网链路聚合板卡
B) 聚合端口是多个逻辑端口组成的逻辑端口,不需要采购以太网链路聚合板卡
C) 聚合端口是多个物理端口组成的逻辑不需要采购以太网链路聚合板卡
D) 聚合端口支持二层聚合端口和三层聚合端口

5. 组播应用基于 UDP ,故组播应用存在如下缺点

A) 尽最大努力交付,无法保证低延时应用需求
B) 可以纠正组播数据包乱序到达的问题
C) 无拥塞控制
D) 数据包重复接收

Solutions: