# Difference between revisions of "Networking: some CIDR calculations"

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The binary numbers available per octet are: 128 - 64 -32 -16-8- 4 -2-1 | The binary numbers available per octet are: 128 - 64 -32 -16-8- 4 -2-1 | ||

− | How to translate a number to a binary number? 192.168.1.0 | + | How to translate a number to a binary number? 192.168.1.0 <br /> |

− | 128 - 64 -32 -16-8- 4 -2-1 | + | 128 - 64 -32 -16-8- 4 -2-1 <br /> |

− | 192 = 128 + 64 = 11000000 | + | 192 = 128 + 64 = 11000000 <br /> |

− | 168 = 128 + 32 + 8 = 10101000 | + | 168 = 128 + 32 + 8 = 10101000 <br /> |

− | 1 = 00000001 | + | 1 = 00000001 <br /> |

− | 0 = 00000000 | + | 0 = 00000000 <br /> |

− | 192.168.1.0 = 11000000.10101000.00000001.00000000 | + | 192.168.1.0 = 11000000.10101000.00000001.00000000 <br /> |

## Revision as of 20:48, 26 November 2020

_TOC__

## How to convert a number to a binary number

In the networking IP4 calculations, an IP address is composed of 32 bits, divided into 4 octets: 00000000.00000000.00000000.00000000 The binary numbers available per octet are: 128 - 64 -32 -16-8- 4 -2-1

How to translate a number to a binary number? 192.168.1.0

128 - 64 -32 -16-8- 4 -2-1

192 = 128 + 64 = 11000000

168 = 128 + 32 + 8 = 10101000

1 = 00000001

0 = 00000000

192.168.1.0 = 11000000.10101000.00000001.00000000