3.07.2013

Memorise it..class C subnets

Here are the possible Class C subnets:

  |  Bits   |        Mask        |  CIDR  |  Subnets |  Hosts  |   
| 0 | 255.255.255.0 | /24 | 1 | 254 |
| 1 | 255.255.255.128 | /25 | 2 | 126 |
| 2 | 255.255.255.192 | /26 | 4 | 62 |
| 3 | 255.255.255.224 | /27 | 8 | 30 |
| 4 | 255.255.255.240 | /28 | 16 | 14 |
| 5 | 255.255.255.248 | /29 | 32 | 6 |
| 6 | 255.255.255.252 | /30 | 64 | 2 |

* Classless Inter-Domain Routing notation