Thursday, 16 July 2009

CIDR - Conversion Calculator

Just to make my life easier

http://www.subnet-calculator.com/cidr.php

2 comments:

  1. CIDR/Netmask is a simple subnet calculator that can be used to quickly convert & display subnet information.

    CIDR Calculator enables CIDR network calculations using IP address, and subnet information.
    Some examples of supported queries on the w3dt server are:
    Use IP & CIDR Netmask: 10.0.0.1/22
    Or IP & Netmask: 10.0.0.1 255.255.252.0
    Or IP & Wildcard Mask: 10.0.0.1 0.0.3.255

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  2. Classless Inter-Domain Routing (CIDR) is an expansion of the IP addressing system that allows for a more efficient and appropriate allocation of addresses. CIDR changed fixed fields into variable-length fields, allowing addresses to be assigned with more granularity. TheCIDR calculator IP address includes a number that tells how the address is split between networks and hosts. For example, in the CIDR address 209.173.53.167/20 the /20 indicates that the first 20 bits are used for network ID and the remaining 12 (there are 32 bits in the IP address) are used for host ID.

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