DanielleM: Created page with "===Definition=== '''C'''lassless '''I'''nter-'''D'''omain '''R'''outing ('''CIDR''') is a method for allocating IP addresses and routing Internet Protocol packets. It is also ..."

2014-04-18T16:09:44Z

Created page with "===Definition=== '''C'''lassless '''I'''nter-'''D'''omain '''R'''outing ('''CIDR''') is a method for allocating IP addresses and routing Internet Protocol packets. It is also ..."

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===Definition===
'''C'''lassless '''I'''nter-'''D'''omain '''R'''outing ('''CIDR''') is a method for allocating IP addresses and routing Internet Protocol packets. It is also used commonly in the tech world to express a group of IP addresses. The most commonly-used CIDR notation is a /24 'block' of IPs, or 256 IPs. An 'IP Range' is another way of expressing these 'block's.

====CIDR Usage / References====

*'''CIDR''': 255.255.224.0'''/19 - 8192 IP addresses.'''
*'''CIDR''': 255.255.240.0'''/20 - 4096 IP addresses.'''
*'''CIDR''': 255.255.248.0'''/21 - 2048 IP addresses.'''
*'''CIDR''': 255.255.252.0'''/22 - 1024 IP addresses.'''
*'''CIDR''': 255.255.254.0'''/23 - 512 IP addresses.'''
*'''CIDR''': 255.255.255.0'''/24 - 256 IP addresses.'''

====IP Range Usage / References====

*'''/19''' : All IPs from 255.255.'''224.2''' through 255.255.255.256.
*'''/20''' : All IPs from 255.255.'''240.2''' through 255.255.255.256.
*'''/21''' : All IPs from 255.255.'''248.2''' through 255.255.255.256.
*'''/22''' : All IPs from 255.255.'''252.2''' through 255.255.255.256.
*'''/23''' : All IPs from 255.255.'''254.2''' through 255.255.255.256.
*'''/24''' : All IPs from 255.255.'''255.2''' through 255.255.255.256.

CIDR notation - Revision history

DanielleM: Created page with "===Definition=== '''C'''lassless '''I'''nter-'''D'''omain '''R'''outing ('''CIDR''') is a method for allocating IP addresses and routing Internet Protocol packets. It is also ..."