一个中等规模的公司，3个不同品牌的路由器都配置了RIPv1协议。ISP为公司分配的地址块为201.113.210.0/24。公司希望通过VLSM技术把网络划分为3个子网，每个子网中有40台主机，下面的配置方案中最优的是（ ）。
- A.转换路由协议为EIGRP，3个子网地址分别设置201.113.210.32/27、201.113.210.64/27和201.113.210.92/27
- B.转换路由协议为RIPv2，3个子网地址分别设置为201.113.210.64/26、 201.113 210.128/26和201.113.210.192/26
- C.转换路由协议为OSPF，3个子网地址分别设置为201.113.210.16/28、 201.113.210.16/28和201.113.210.48/28
- D.保持路由协议为RIPv1，3个子网地址分别设置为201.113.210.32/26、201.113.210.64/26和201.113.210.92/26
正确答案及解析
正确答案
解析
考查了两个支持点，一是RIPV1不支持可变长网掩码，RIPV2支持。二是子网划分。根据题干得出，40台主机，主机位必须为6位。得出其掩码为/26，同时需要使用RIPV2路由协议。
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