Class | Leading bits | Start | End | CIDR prefix | Default subnet mask |
Class A | 0 | 0.0.0.0 | 127.255.255.255 | /8 | 255.0.0.0 |
Class B | 10 | 128.0.0.0 | 191.255.255.255 | /16 | 255.255.0.0 |
Class C | 110 | 192.0.0.0 | 223.255.255.255 | /24 | 255.255.255.0 |
Class D (multicast) | 1110 | 224.0.0.0 | 239.255.255.255 | /4 | not defined |
Class E (reserved) | 1111 | 240.0.0.0 | 255.255.255.255 | /4 | not defined |
歡迎光臨 How2Do (http://forum.how2do.com.hk/) | Powered by Discuz! 7.2 |