在一条点对点的链路上，为了减少地址的浪费，子网掩码应该指定为( )。
- A.255.255.255.252
- B.255.255.255.248
- C.255.255.255.240
- D.255.255.255.196
正确答案及解析
正确答案
解析
子网掩码为255．255．255．252的地址访问总共只有4个地址，一个网络地址，一个广播地址，剩下两个地址分配给点对点的两个接口使用。B、C、D选项浪费地址都过多。
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