题目详情

图4-1为某学校网络拓扑图,运营商分配的公网IP地址为113.201.60.1/29,运营商网关地址为113.201.60.1,内部用户通过路由器代理上网,代理地址为113.201.60.2.核心交换机配置基于全局的DHCP服务,在办公楼和宿舍楼用户提供DHCP服务。内部网络划分为3个VLAN,其中VLAN10的地址10.0.10.1/24,VLAN20的地址10.0.20.1/24,VLAN30的地址10.0.30.1/24,请结合下图,回答相关问题。

中级网络工程师,历年真题,2017年上半年(下午)《网络工程师》案例分析真题

图4-1

【问题1】(共9分)

路由器的配置片段如下,根据图4-1,补齐(1)~(6)空缺的命令。

#配置WAN接口和内网上网代理

<Huawei>system-view

[Huawei]sysname()

[Router]interface()

[Router-GigabitEthernet1/0/0]ip address()

[Router-GigabitEthernet1/0/0]quit

[Router]ip route-static 0.0.0.0 0.0.0.0()

[Router-acI-basic-2000]

[Router-acI-basic-2000]rule 5 permit source 10.0.0.0()

[Router-acl-basic-2000]quit

[Router]interface GigabitEthernet1/0/0

[Router-GigabitEthernet1/0/0]nat outbound()

[Router-GigabitEthernet1/0/0]quit

……

其他配置略

【问题2】(共6分)

核心交换机的配置片段如下,根据图4-1,补齐(7)~(10)空缺的命令。

#配置GEO/0/2接口加入VLAN20,并配置对应VLAN接口地址

[Switch]vlanbatch20

[Switch]inlterface?GigabitEthernet0/0/2

[Switch-GigabitEthernet0/0/2]port?link-type()

[Switch-GigabitEthernet0/0/2]port?hybrid?pvid?vlan20

[Switch-GigabitEthernet0/0/2]port?hybrid?untagged?vlan20

[Switch-GigabitEthernet0/0/2]quit

[Switch]interface?vlanif?20

[Switch-Vlanif20]ip?address()

[Switch-Vlanif20]quit

.......

其他配置略

#配置DHCP服务,租期3天

[Switch]dhcp()

[Switch]ip?pool?pooll

[Switch-ip-pool-pooll]network?10.0.20.0?mask?225.225.255.0

[Switch-ip-pool-pooll]dns-list?10.0.10.2

[Switch-ip-pool-pooll]gateway-list?10.0.20.1

[Switch-ip-pool-pooll]lesae?day()

[Switch-ip-pool-pooll]quit

[Switch]interface?vlanif?20

[Switch-Vlanif20]dhcp?select?global

[Switch-Vlanif20]quit

......

其他配置略

正确答案及解析

正确答案
解析

【问题1】(共9分)

(1)Router

(2)GigabitEthernet 1/0/0

(3)113.201.60.2 255.255.255.248

(4)113.201.60.1

(5)0.255.255.255(0.255.255.255—0.0.31.255任意一个合适的掩码均正确)

(6)2000

【问题2】(共6分)

(7)hybrid

(8)10.0.20.1 255.255.255.0

(9)enable

(10)3

【问题1】(共9分)

(1)对设备进行重命名。

(2)进入端口子模式

(3)给端口配置IP和掩码。

(4)配置默认路由,下一跳指向ISP地址。

(5)配置反掩码

(6)把符合ACL2000的地址做NAT转换

【问题2】(共6分)

(7)除了Access类型和Trunk类型外,交换机还支持第三种Hybrid类型端口。这种接口可以接收和发送多个VLAN数据帧,同时还能指定对任何VLAN帧进行剥离标签操作。

(8)配置接口IP和掩码

(9)dhcp enable:开启DHCP配置。

lease day 3:配置租约期间为3天。

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