|
Net bits
|
Subnet mask |
total-addresses |
| /20 |
255.255.240.0 |
4096 |
| /21 |
255.255.248.0 |
2048 |
| /22 |
255.255.252.0 |
1024 |
| /23 |
255.255.254.0 |
512 |
| /24 |
255.255.255.0 |
256 |
| /25 |
255.255.255.128 |
128 |
| /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 |
| Net Mask |
二進位表示法 |
可分幾個 Network |
| 255.255.255.0 |
11111111.11111111.11111111.00000000 |
1 |
| 255.255.255.128 |
11111111.11111111.11111111.10000000 |
2 |
| 255.255.255.192 |
11111111.11111111.11111111.11000000 |
4 |
| 255.255.255.224 |
11111111.11111111.11111111.11100000 |
8 |
| 255.255.255.240 |
11111111.11111111.11111111.11110000 |
16 |
| 255.255.255.248 |
11111111.11111111.11111111.11111000 |
32 |
| 255.255.255.252 |
11111111.11111111.11111111.11111100 |
64 |
ryanccc 發表在
痞客邦
留言(0)
人氣(
5
)
請先 登入 以發表留言。