==== Red clase B (W.X.###.###) ====
{{:red:tcp_ip:clase_b.jpg?600x250|}}
^Máscara ^Bits de Red ^Bits de Host ^Nº máximo de Redes \\ 2<sup>bits de red</sup> ^Nº máximo de Host \\ (2<sup>bits de host</sup>)-2 ^
|11111111.11111111.10000000.00000000 \\ 255.255.128.0|1|15|2|32.766|
|11111111.11111111.11000000.00000000 \\ 255.255.192.0|2|14|4|16.382|
|11111111.11111111.11100000.00000000 \\ 255.255.224.0|3|13|8|8.190|
|11111111.11111111.11110000.00000000 \\ 255.255.240.0|4|12|16|4094|
|11111111.11111111.11111000.00000000 \\ 255.255.248.0|5|11|32|2.046|
|11111111.11111111.11111100.00000000 \\ 255.255.252.0|6|10|64|1.022|
|11111111.11111111.11111110.00000000 \\ 255.255.254.0|7|9|128|510|
|11111111.11111111.11111111.00000000 \\ 255.255.255.0|8|8|256|254|
|11111111.11111111.11111111.10000000 \\ 255.255.255.128|9|7|512|126|
|11111111.11111111.11111111.11000000 \\ 255.255.255.192|10|6|1.024|62|
|11111111.11111111.11111111.11100000 \\ 255.255.255.224|11|5|2.048|30|
|11111111.11111111.11111111.11110000 \\ 255.255.255.240|12|4|4.096|14|
|11111111.11111111.11111111.11111000 \\ 255.255.255.248|13|3|8.192|6|
|11111111.11111111.11111111.11111100 \\ 255.255.255.252|14|2|16.384|2|