精选优质文档-倾情为你奉上子网掩码-掩码位-反掩码对比表子网掩码 CIDR 主机数 可用主机数 C类网段数量Subnet MaskCIDR PrefixTotal IPsUsable IPsNumber of Class C networks255.255.255.255/32111/256th255.255.255.254/31201/128th255.255.255.252/30421/64th255.255.255.248/29861/32nd255.255.255.240/2816141/16th255.255.255.224/2732301/8th255.255.255.192/2664621/4th255.255.255.128/251281261 half255.255.255.0/242562541255.255.254.0