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Subject: Examples
Author: IpGuru
In response to: CIDR -- Classless Inter-Domain Routing
Posted on: 12/17/2010 03:23:04 PM
10.11.12.13 --> 10.11.12.13/32 ==> match
10.11.12.13 --> 10.11.12.0/24 ==> match
10.11.12.13 --> 10.11.0.0/16 ==> match
10.11.12.13 --> 10.0.0.0/8 ==> match
>
> On 12/17/2010 03:17:57 PM IpGuru wrote:
CIDR stands for Classless Inter-Domain Routing which is a methodology of allocating IP addresses and routing Internet Protocol packets.
An IP address is interpreted as composed of two parts: a network-identifying prefix followed by a host identifier within that network.
CIDR blocks are identified using a syntax similar to that of IPv4 addresses: a four-part dotted-decimal address, followed by a slash, then a number from 0 to 32: A.B.C.D/N.
The number following the slash is the prefix length, the number of shared initial bits, counting from the most significant bit of the address.
An IP address is part of a CIDR block, and is said to match the CIDR prefix, if the initial N bits of the address and the CIDR prefix are the same.
References:
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