Difference between revisions of "CIDR"
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CIDR stands for Classless Independent Domain Routing. It replaced Classes A, B, C networks on the Internet. The CIDR notation counts how many left-most bits are contained in a [[netmask]]. So that a class A would be a /8, a class B would be a /16 and a class C would be a /24. A /32 is an individual [[IP]] and /0 represents the entire Internet often used with [[firewall]]ing. | CIDR stands for Classless Independent Domain Routing. It replaced Classes A, B, C networks on the Internet. The CIDR notation counts how many left-most bits are contained in a [[netmask]]. So that a class A would be a /8, a class B would be a /16 and a class C would be a /24. A /32 is an individual [[IP]] and /0 represents the entire Internet often used with [[firewall]]ing. | ||
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| + | == IPv6 == | ||
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| + | An IPv6 CIDR notation is natural because you have a prefix and a prefix length. If the prefix length is 64 then the notation would be fd00:f00::/64 or similar. | ||
Revision as of 11:10, 15 December 2011
CIDR stands for Classless Independent Domain Routing. It replaced Classes A, B, C networks on the Internet. The CIDR notation counts how many left-most bits are contained in a netmask. So that a class A would be a /8, a class B would be a /16 and a class C would be a /24. A /32 is an individual IP and /0 represents the entire Internet often used with firewalling.
IPv6
An IPv6 CIDR notation is natural because you have a prefix and a prefix length. If the prefix length is 64 then the notation would be fd00:f00::/64 or similar.
