Subnetting
Classful Addressing
| Class A | Class B | Class C | Class D | Class E |
|---|---|---|---|---|
| 0.0.0.0 - 127.255.255.255 | 128.0.0.0 - 191.255.255.255 | 192.0.0.0 - 223.255.255.255 | 224.0.0.0 - 239.255.255.255 | 240.0.0.0 - 255.255.255.255 |
| - Wastage of IP Addresses | ||||
| - No flexibility | ||||
| - Maintenance is time consuming | ||||
| #### Classless Addressing |
- Addresses should be contiguous
- No of addresses in a block should be power of 2
- First address of each block should be divisible by size of block