| Subnet |
Subnet Mask (Dec) |
Host 수 |
비고 |
| /8 |
255.0.0.0 |
16,777,216 |
A Class Default Subnet Mask |
| /9 |
255.128.0.0 |
8,388,608 |
A Class Subnet Mask |
| /10 |
255.192.0.0 |
4,194,304 |
| /11 |
255.224.0.0 |
2,097,152 |
| /12 |
255.240.0.0 |
1,048,576 |
| /13 |
255.248.0.0 |
524,288 |
| /14 |
255.252.0.0 |
262,144 |
| /15 |
255.254.0.0 |
131,072 |
| /16 |
255.255.0.0 |
65,536 |
B Class Default Subnet Mask |
| /17 |
255.255.128.0 |
32,768 |
B Class Subnet Mask |
| /18 |
255.255.192.0 |
16,384 |
| /19 |
255.255.224.0 |
8,192 |
| /20 |
255.255.240.0 |
4,096 |
| /21 |
255.255.248.0 |
2,048 |
| /22 |
255.255.252.0 |
1,024 |
| /23 |
255.255.254.0 |
512 |
| /24 |
255.255.255.0 |
256 |
C Class Default Subnet Mask |
| /25 |
255.255.255.128 |
128 |
C Class Subnet Mask |
| /26 |
255.255.255.192 |
64 |
| /27 |
255.255.255.224 |
32 |
| /28 |
255.255.255.240 |
16 |
| /29 |
255.255.255.248 |
8 |
| /30 |
255.255.255.252 |
4 |
| /31 |
255.255.255.254 |
2 |
| /32 |
255.255.255.255 |
1 | 이거 역시 필요해서 퍼왔음
출처 : http://blog.naver.com/sokoban
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