Info
Define que parte de una direccion IPv4 corresponde a la red y cual al host
Habitualmente se representa utilizando el Sistemas de Numeracion Decimal, aunque internamente es un sistema de bits en binario
Ademmas se pueden usar
- CIDR (Longitud de prefijo):
/24 - Mascara decimal:
255.255.255.0 - Wildcard (Marcara Invertida):
0.0.0.255
IP Disponibles utilizables
Sigue la formula ()
A excepcion de
/31que tiene 2 IPs utilizables en un enlace Punto a Punto, referencia RFC3021
Tabla Completa
| CIDR | Decimal(Dec) | Wildcard | N° IP Disponibles |
|---|---|---|---|
| /32 | 255.255.255.255 | 0.0.0.0 | 1 |
| /31 | 255.255.255.254 | 0.0.0.1 | 2 |
| /30 | 255.255.255.252 | 0.0.0.3 | 4 |
| /29 | 255.255.255.248 | 0.0.0.7 | 8 |
| /28 | 255.255.255.240 | 0.0.0.15 | 16 |
| /27 | 255.255.255.224 | 0.0.0.31 | 32 |
| /26 | 255.255.255.192 | 0.0.0.63 | 64 |
| /25 | 255.255.255.128 | 0.0.0.127 | 128 |
| /24 | 255.255.255.0 | 0.0.0.255 | 256 |
| /23 | 255.255.254.0 | 0.0.1.255 | 512 |
| /22 | 255.255.252.0 | 0.0.3.255 | 1,024 |
| /21 | 255.255.248.0 | 0.0.7.255 | 2,048 |
| /20 | 255.255.240.0 | 0.0.15.255 | 4,096 |
| /19 | 255.255.224.0 | 0.0.31.255 | 8,192 |
| /18 | 255.255.192.0 | 0.0.63.255 | 16,384 |
| /17 | 255.255.128.0 | 0.0.127.255 | 32,768 |
| /16 | 255.255.0.0 | 0.0.255.255 | 65,536 |
| /15 | 255.254.0.0 | 0.1.255.255 | 131,072 |
| /14 | 255.252.0.0 | 0.3.255.255 | 262,144 |
| /13 | 255.248.0.0 | 0.7.255.255 | 524,288 |
| /12 | 255.240.0.0 | 0.15.255.255 | 1,048,576 |
| /11 | 255.224.0.0 | 0.31.255.255 | 2,097,152 |
| /10 | 255.192.0.0 | 0.63.255.255 | 4,194,304 |
| /9 | 255.128.0.0 | 0.127.255.255 | 8,388,608 |
| /8 | 255.0.0.0 | 0.255.255.255 | 16,777,216 |
| /7 | 254.0.0.0 | 1.255.255.255 | 33,554,432 |
| /6 | 252.0.0.0 | 3.255.255.255 | 67,108,864 |
| /5 | 248.0.0.0 | 7.255.255.255 | 134,217,728 |
| /4 | 240.0.0.0 | 15.255.255.255 | 268,435,456 |
| /3 | 224.0.0.0 | 31.255.255.255 | 536,870,912 |
| /2 | 192.0.0.0 | 63.255.255.255 | 1,073,741,824 |
| /1 | 128.0.0.0 | 127.255.255.255 | 2,147,483,648 |
| /0 | 0.0.0.0 | 255.255.255.255 | 4,294,967,296 |
Tabla Decimal a Binario
| Dec-Mask | Binario |
|---|---|
| 255 | 1111 1111 |
| 254 | 1111 1110 |
| 252 | 1111 1100 |
| 248 | 1111 1000 |
| 240 | 1111 0000 |
| 224 | 1110 0000 |
| 192 | 1100 0000 |
| 128 | 1000 0000 |
| 0 | 0000 0000 |
| Wildcard | Binario |
|---|---|
| 0 | 0000 0000 |
| 1 | 0000 0001 |
| 3 | 0000 0011 |
| 7 | 0000 0111 |
| 15 | 0000 1111 |
| 31 | 0001 1111 |
| 63 | 0011 1111 |
| 127 | 0111 1111 |
| 255 | 1111 1111 |