Classful IPv4 addressing definition
Posted ybluo
tags:
篇首语：本文由小常识网(cha138.com)小编为大家整理，主要介绍了Classful IPv4 addressing definition相关的知识，希望对你有一定的参考价值。
Classful addressing definition
| Class | Leading bits | Size of network number bit field | Size of rest bit field | Number of networks | Addresses per network | Total addresses in class |
Start address | End address |
|---|---|---|---|---|---|---|---|---|
| Class A | 0 | 8 | 24 | 128 (27) | 16,777,216 (224) | 2,147,483,648 (231) | 0.0.0.0 | 127.255.255.255 |
| Class B | 10 | 16 | 16 | 16,384 (214) | 65,536 (216) | 1,073,741,824 (230) | 128.0.0.0 | 191.255.255.255 |
| Class C | 110 | 24 | 8 | 2,097,152 (221) | 256 (28) | 536,870,912 (229) | 192.0.0.0 | 223.255.255.255 |
| Class D (multicast) | 1110 | not defined | not defined | not defined | not defined | 268,435,456 (228) | 224.0.0.0 | 239.255.255.255 |
| Class E (reserved) | 1111 | not defined | not defined | not defined | not defined | 268,435,456 (228) | 240.0.0.0 | 255.255.255.255 |
以上是关于Classful IPv4 addressing definition的主要内容，如果未能解决你的问题，请参考以下文章