Question

网络ip问题

考网络，有一个网络IP是172.16.4.0/26
求可用主机地址范围，怎么求？还有这个/26什么意思？

Answer 1

172.16.0.0是B类ip，自然的网络位数是16，主机位数是16,26指的是掩码的位数，那么借用26-16=10位来做网络位来划分子网，就是2^10=1024个子网，那么主机位就剩下16-10=6每个子网的主机数就是2^6-2=62个。
每个子网都有各自的主机地址范围，比如这1024个子网的情况可以为：
Subnet Mask Inverse Mask Subnet Size Host Range Broadcast
172.16.0.0 255.255.255.192 0.0.0.63 62 172.16.0.1 to 172.16.0.62 172.16.0.63
172.16.0.64 255.255.255.192 0.0.0.63 62 172.16.0.65 to 172.16.0.126 172.16.0.127
172.16.0.128 255.255.255.192 0.0.0.63 62 172.16.0.129 to 172.16.0.190 172.16.0.191
172.16.0.192 255.255.255.192 0.0.0.63 62 172.16.0.193 to 172.16.0.254 172.16.0.255
172.16.1.0 255.255.255.192 0.0.0.63 62 172.16.1.1 to 172.16.1.62 172.16.1.63
172.16.1.64 255.255.255.192 0.0.0.63 62 172.16.1.65 to 172.16.1.126 172.16.1.127
................................
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172.16.255.0 255.255.255.192 0.0.0.63 62 172.16.255.1 to 172.16.255.62 172.16.255.63
172.16.255.64 255.255.255.192 0.0.0.63 62 172.16.255.65 to 172.16.255.126 172.16.255.127
172.16.255.128 255.255.255.192 0.0.0.63 62 172.16.255.129 to 172.16.255.190 172.16.255.191
172.16.255.192 255.255.255.192 0.0.0.63 62 172.16.255.193 to 172.16.255.254 172.16.255.255

Answer 2

这是我算的，只能帮你到这了