CIDR: Difference between revisions
From Hackepedia
Jump to navigationJump to search
mNo edit summary |
No edit summary |
||
| Line 1: | Line 1: | ||
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. | ||
== 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. | |||
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.
