已知网络地址为129.23.144.16,如何求ip地址范围?
第一步:求网络地址将子网掩码255.255.192.0与主机129.23.144.16进行与运算的到网络地址为:129.23.128.0。
第二步:求ip129.23.144.16与子网掩码255.255.192.0的ip地址范围
由题得知这是个B类IP,子网掩码中 192 转换成二进制为:1100 0000 。可知主机位向网络位借了2位,其子网有2^n(n为借的位数)段;也就是有2x2=4个子网段;再由这个子网掩码算出子网的地址块256-192=64,每个子网的地址有64个。所以ip地址范围为129.23.0.0——129.23.63.255;129.23.64.0——129.23.127.255;129.23.128.0——129.23.191.255;129.23.192.0——129.23.255.255。B选项129.23.127.222不在此ip地址范围内。
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