Diff: IPv4

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+++ Version 1 

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+Internet Protocol, version 4. 

+ 

+Defined by the [IETF] in RFC791, this is the protocol most widely used as the basis of the [Internet]. 

+ 

+It is normally most visible as an [IPAddress], which in version 4 has the format 

+ 

+  ''nnn.nnn.nnn.nnn'' 

+ 

+where ''nnn'' is a number between 0 and 255. 

+ 

+IPv4 is in the process of being superceded by [IPv6], although the transition will take a very long time (like, decades).