切分表
192.168.1.0/24 切成 /29
借 5 位，32 个子网，每个 6 台可用主机。
- 原网段
- 192.168.1.0/24
- 新掩码
- 255.255.255.248
- 子网个数
- 32（2 的 5 次方）
- 每个子网可用主机
- 6
- 块大小
- 8
算法
从 /24 到 /29，网络位多了 5 位，所以子网数是 2 的 5 次方，等于 32。主机位剩 3 位，每个子网 8 个地址，去掉网络地址和广播地址，剩 6 台。表里相邻两行的网络地址正好差一个块大小 8。
| # | 网络地址 | 首个可用 | 末个可用 | 广播地址 | 可用主机数 |
|---|---|---|---|---|---|
| 1 | 192.168.1.0/29 | 192.168.1.1 | 192.168.1.6 | 192.168.1.7 | 6 |
| 2 | 192.168.1.8/29 | 192.168.1.9 | 192.168.1.14 | 192.168.1.15 | 6 |
| 3 | 192.168.1.16/29 | 192.168.1.17 | 192.168.1.22 | 192.168.1.23 | 6 |
| 4 | 192.168.1.24/29 | 192.168.1.25 | 192.168.1.30 | 192.168.1.31 | 6 |
| 5 | 192.168.1.32/29 | 192.168.1.33 | 192.168.1.38 | 192.168.1.39 | 6 |
| 6 | 192.168.1.40/29 | 192.168.1.41 | 192.168.1.46 | 192.168.1.47 | 6 |
| 7 | 192.168.1.48/29 | 192.168.1.49 | 192.168.1.54 | 192.168.1.55 | 6 |
| 8 | 192.168.1.56/29 | 192.168.1.57 | 192.168.1.62 | 192.168.1.63 | 6 |
| 9 | 192.168.1.64/29 | 192.168.1.65 | 192.168.1.70 | 192.168.1.71 | 6 |
| 10 | 192.168.1.72/29 | 192.168.1.73 | 192.168.1.78 | 192.168.1.79 | 6 |
| 11 | 192.168.1.80/29 | 192.168.1.81 | 192.168.1.86 | 192.168.1.87 | 6 |
| 12 | 192.168.1.88/29 | 192.168.1.89 | 192.168.1.94 | 192.168.1.95 | 6 |
| 13 | 192.168.1.96/29 | 192.168.1.97 | 192.168.1.102 | 192.168.1.103 | 6 |
| 14 | 192.168.1.104/29 | 192.168.1.105 | 192.168.1.110 | 192.168.1.111 | 6 |
| 15 | 192.168.1.112/29 | 192.168.1.113 | 192.168.1.118 | 192.168.1.119 | 6 |
| 16 | 192.168.1.120/29 | 192.168.1.121 | 192.168.1.126 | 192.168.1.127 | 6 |
| 17 | 192.168.1.128/29 | 192.168.1.129 | 192.168.1.134 | 192.168.1.135 | 6 |
| 18 | 192.168.1.136/29 | 192.168.1.137 | 192.168.1.142 | 192.168.1.143 | 6 |
| 19 | 192.168.1.144/29 | 192.168.1.145 | 192.168.1.150 | 192.168.1.151 | 6 |
| 20 | 192.168.1.152/29 | 192.168.1.153 | 192.168.1.158 | 192.168.1.159 | 6 |
| 21 | 192.168.1.160/29 | 192.168.1.161 | 192.168.1.166 | 192.168.1.167 | 6 |
| 22 | 192.168.1.168/29 | 192.168.1.169 | 192.168.1.174 | 192.168.1.175 | 6 |
| 23 | 192.168.1.176/29 | 192.168.1.177 | 192.168.1.182 | 192.168.1.183 | 6 |
| 24 | 192.168.1.184/29 | 192.168.1.185 | 192.168.1.190 | 192.168.1.191 | 6 |
| 25 | 192.168.1.192/29 | 192.168.1.193 | 192.168.1.198 | 192.168.1.199 | 6 |
| 26 | 192.168.1.200/29 | 192.168.1.201 | 192.168.1.206 | 192.168.1.207 | 6 |
| 27 | 192.168.1.208/29 | 192.168.1.209 | 192.168.1.214 | 192.168.1.215 | 6 |
| 28 | 192.168.1.216/29 | 192.168.1.217 | 192.168.1.222 | 192.168.1.223 | 6 |
| 29 | 192.168.1.224/29 | 192.168.1.225 | 192.168.1.230 | 192.168.1.231 | 6 |
| 30 | 192.168.1.232/29 | 192.168.1.233 | 192.168.1.238 | 192.168.1.239 | 6 |
| 31 | 192.168.1.240/29 | 192.168.1.241 | 192.168.1.246 | 192.168.1.247 | 6 |
| 32 | 192.168.1.248/29 | 192.168.1.249 | 192.168.1.254 | 192.168.1.255 | 6 |