与地址220.112.179.92匹配的路由表的表项是（ ）。
- A.220.112.145.32/22
- B.220.112.145.64/22
- C.220.112.147.64/22
- D.220.112.177.64/22
正确答案及解析
正确答案
解析
地址220.112.179.92中179的二制码为10110011，假如网络号采用22位，与该地址匹配的路由表项则为220.112.177.64/22。
这道题考查的仍然是同一子网这样的问题，
因此，根据选项可知，我们选择的都是22位网络地址的地址，那么将4个选项和题干给出的IP地址当中第三段IP都转换为二进制，可知题干IP地址第三段179转换为二进制为10110011；
这里的8位二进制，其中前6位为网络号，因此只有D选项与题干IP在同一子网中，也就是与之匹配的路由表项。
A选项145转换为二进制为10010001；
B选项145转换为二进制与之相同；
C选项147转换为二进制为10010011；
D选项转换为二进制为10110001。
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