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Subnetting

El subnetting consiste en dividir una red grande en varias subredes más pequeñas

Redes IPv4 Privadas

Direccionamiento para redes privadas

Clase A B C
Direccionamiento privado 10.0.0.0 a
10.255.255.255.255 		172.16.0.0 a
172.31.255.255 		192.168.0.0 a
192.168.255.255

CIDR

CIDR (Classless Inter-Domain Routing)

La notación CIDR es una forma abreviada de especificar la máscara de subred.

CIDR Máscara subred Máscara Comodín Total direcciones IP Total IP utilizables
32 255.255.255.255 0.0.0.0
31 255.255.255.254 0.0.0.1 2 2 (RFC3021)
30 255.255.255.252 0.0.0.3 4 2
29 255.255.255.248 0.0.0.7 8 6
28 255.255.255.240 0.0.0.15 16 14
27 255.255.255.224 0.0.0.31 32 30
26 255.255.255.192 0.0.0.63 64 62
25 255.255.255.128 0.0.0.127 128 126
24 255.255.255.0 0.0.0.255 256 254
23 255.255.254.0 0.0.1.255 512 510
22 255.255.252.0 0.0.3.255 1,024 1,022
21 255.255.248.0 0.0.7.255 2,048 2,046
20 255.255.240.0 0.0.15.255 4,096 4,094
19 255.255.224.0 0.0.31.255 8,192 8,190
18 255.255.192.0 0.0.63.255 16,384 16,382
17 255.255.128.0 0.0.127.255 32,768 32,766
16 255.255.0.0 0.0.255.255 65,536 65,534
15 255.254.0.0 0.1.255.255 131,072 131,070
14 255.252.0.0 0.3.255.255 262,144 262,142
13 255.248.0.0 0.7.255.255 524,288 524,286
12 255.240.0.0 0.15.255.255 1,048,576 1,048,574
11 255.224.0.0 0.31.255.255 2,097,152 2,097,150
10 255.192.0.0 0.63.255.255 4,194,304 4,194,302
9 255.128.0.0 0.127.255.255 8,388,608 8,388,606
8 255.0.0.0 0.255.255.255 16,777,216 16,777,214
7 254.0.0.0 1.255.255.255 33,554,432 33,554,430
6 252.0.0.0 3.255.255.255 67,108,864 67,108,862
5 248.0.0.0 7.255.255.255 134,217,728 134,217,726
4 240.0.0.0 15.255.255.255 268,435,456 268,435,454
3 224.0.0.0 31.255.255.255 536,870,912 536,870,910
2 192.0.0.0 63.255.255.255 1,073,741,824 1,073,741,822
1 128.0.0.0 127.255.255.255 2,147,483,648 2,147,483,646
0 0.0.0.0 255.255.255.255 4,294,967,296 4,294,967,294