子网掩码掩码位反掩码对比表连续掩码和不连续的反掩码

1、子网掩码-掩码位-反掩码比照表连续掩码和不连续的反掩码2021年12月01日 星期三23:33子网掩码？CIDR主机数可用主机数C 类网段数量Subnet MaskCIDR PrefixTotal IP'sUsable IP's Number of Class C networks/32111/256th/31201/128th/30421/64th/29861/32nd/2816141/16th/2732301/8th/2664621/4th/251281261 half/242562541/235125102/22102410224/21204820468/20409640

2、9416/198192819032/1816,38416,38264/1732,76832,766128Subnet MaskCIDR PrefixTotal IP'sUsable IP's Number of Class C networks/1665,53665,534256/15131,072131,070512/14262,144262,1421024/13524,288524,2862048/121,048,5761,048,5744096/112,097,1522,097,1508192/104,194,3044,194,30216,384/98,388,6088,

3、388,60632,768/816,777,21616,777,21465,536/733,554,43233,554,430131,072/667,108,86467,108,862262,144/5134,217,728134,217,7261,048,576/4268,435,456268,435,4542,097,152/3536,870,912536,870,9104,194,304/21,073,741,8241,073,741,8228,388,608/12,147,483,6482,147,483,64616,777,2160.0.0.0/04,294,967,2964,294

4、,967,29433,554,432子网掩码-掩码位-反掩码 对照表*记录:我们知道正掩码 中的1是连续的.1代表匹配,0代表不匹配.例如1.1.1而反掩码 中的1是可以不连续的.0代表匹配,1代表可忽略.例如2.2.2因此就有了两种可能0000 0000、0000 0010.? 所以该网段范围有2.2.2再举例2.2.20000 00000000 00100000 10000000 1010所以该反掩码网段范围4个ip地址2.2.2.02.2.2.22.2.2.82.2.2.10实例：拓扑图2. 2. 2.2/24SvitchO2 2之 12/24PCO2.2 2.8/241 1.1.2/242.2.2.11/24k 1 1.1 1/24PC-PTPCI1841Route rOPC-PTPC2PC-PTPCSip配置如上图所示实验目的：验证反掩码1的不连续性.Router重要配置：interface F