阅读以下说明,回答问题1至问题4,将解答填入答题纸对应的解答栏内。
【说明】
某公司上网用户较少(约50台上网机器),因此公司网管申请了公网IP地址(117.112.2.101/30),拟通过NAT方式结合ACL提供公司内部员工上网,公司内网IP地址段为192.168.1.0/24。
该公司的网络拓扑结构如图3-1所示。
【问题4】(3分)
随着公司内部网络的不断扩大,为了公司内网的安全,可利用 (18) 快速实现企业内网的VLAN配置以解决广播风暴的问题,同时可使用 (19) 解决网络中的地址冲突以及地址欺骗等现象。
如果要实现外网用户对公司的Web服务器的访问,可利用 (20) 在R1上实现。随着公司规模的扩大,Web服务器的访问量也会增大,这时也可将该网站托管。
正确答案及解析
正确答案
解析
18 交换机
19 DHCP
20 端口映射NPAT
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